Kyushu University Academic Staff Educational and Research Activities Database
List of Presentations
Kazuaki Hiramatsu Last modified date:2021.10.07

Professor / Division of Bioproduction Environmental Sciences / Department of Agro-environmental Sciences / Faculty of Agriculture


Presentations
1. Kunihiko Hamagami, Ayane Mizunashi, Masayoshi Harada, Akinori Ozaki, Toshinori Tabata and Kazuaki Hiramatsu: Characteristics of Short-term Vertical Migration of Cyanobacteria in Closed Waters, Proceedings of the 2020 Annual Conference of Tohoku Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, pp.6-7, 2020.
2. Asari Takada, Kazuaki Hiramatsu, Ngoc Anh Trieu, Masayoshi Harada and Toshinori Tabata, Evaluation of Impact of Climate Change and Rural Development on Rainfall-Runoff in a Southeast Asian Watershed by a Distributed Model Incorporated with Tank Models for Several Land Uses, The 22nd Congress of International Association for Hydro-Environment Engineering and Research (IAHR), Asia Pacific Division (APD), 2020.09.
3. Masayoshi Harada, Kosuke Hayami, Kazuaki Hiramatsu and Toshinori Tabata, Water Environment Improvement in an Organically Polluted Closed Water Body by Artificial Water Surface Cooling, The 22nd Congress of International Association for Hydro-Environment Engineering and Research (IAHR), Asia Pacific Division (APD), 2020.09.
4. Ren Yamamoto, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata:Estimation of Class-differentiated Chl.a by Multi-wavelength Excitation Fluorometer using Three-layered Feedforward Artificial Neural Network, Proceedings of the 2020 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper Number 2-65, 2020.
5. Sai Hong Anh, Toshinori Tabata, Kazuaki Hiramatsu, Le Viet Son and Masayoshi Harada, Assessment of Floodwater Impact on Residential Areas in the Floodplain Areas along the Day River System in the case of Emergency Solution to Protect Hanoi Capital, The 7th JASID (The Japan Society For International Development) Western Japan Research Meeting, 2020.08.
6. Takuma Kobayashi, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata, Seasonal Changes in Phytoplankton characteristics in a Hyper-eutrophic Water Area under Nitrogen Limitation, International Workshop on “Integrated Land & Water Management and Climate Change in Vietnam and Japan” between Vietnam National University of Agriculture and Kyushu University, 2019.11.
7. Misaki Kawara, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata, Experimental Suppression of Phytoplankton Growth Employing Bactericidal Effects of Copper Ions under Eutrophic Conditions, International Workshop on “Integrated Land & Water Management and Climate Change in Vietnam and Japan” between Vietnam National University of Agriculture and Kyushu University, 2019.11.
8. Makoto Fukui, Kazuaki Hiramatsu, Shinji Fukuda, Dario Pineda, Toshinori Tabata and Masayoshi Harada, Development of long-term rainfall-runoff model and scenario analyses for water-saving effect in rice farming in the Ibague Watershed, Colombia, International Workshop on “Integrated Land & Water Management and Climate Change in Vietnam and Japan” between Vietnam National University of Agriculture and Kyushu University, 2019.11.
9. Toshinori Tabata, Akihiro Fukuda, Kazuaki Hiramatsu and Masayoshi Harada, Applicability of a Three-Dimensional Dissolved Oxygen Model, International Workshop on “Integrated Land & Water Management and Climate Change in Vietnam and Japan” between Vietnam National University of Agriculture and Kyushu University, 2019.11.
10. Sai Hong Anh, Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada, Evaluation of Flood Mitigation Function of the Van Coc Lake in a Catastrophic Flood Event of the Red River, Northern Vietnam, International Workshop on “Integrated Land & Water Management and Climate Change in Vietnam and Japan” between Vietnam National University of Agriculture and Kyushu University, 2019.11.
11. Asari Takada, Kazuaki Hiramatsu, Ngoc Anh Trieu, Masayoshi Harada and Toshinori Tabata, Development of a Distributed Rainfall-Runoff Model Incorporated with Tank Models of Several Land Uses and Evaluation of Impact of Climate Change on Rainfall-Runoff in a Vietnamese Watershed, International Workshop on “Integrated Land & Water Management and Climate Change in Vietnam and Japan” between Vietnam National University of Agriculture and Kyushu University, 2019.11.
12. Akihiro Fukuda, Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada, Salinity Analysis for Tracking the Behavior of Large Freshwater Discharge into Hakata Bay Due to Heavy Rainfall Using a Three-Dimensional sigma-Coordinate Model, International Workshop on “Integrated Land & Water Management and Climate Change in Vietnam and Japan” between Vietnam National University of Agriculture and Kyushu University, 2019.11.
13. Ren Yamamoto, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata: Improvement of Generalization Ability of Hierarchical FFNN in Short-Term Prediction of Class-divided Chl.a in an Eutrophic Reservoir, Proceedings of the 27th Annual Conference of Japan Rainwater Catchment Systems Association, pp.101-106, Matsue Campus, Tottori University, November 10, 2019.
14. Masayoshi Harada, Kazuaki Hiramatsu, Toshinori Tabata and Kosuke Hayami: Recovery from Anoxification and Suppression of Algae Over-Growth by Water Surface Cooling in an Organically Polluted Closed Water Body, Proceedings of the 27th Annual Conference of Japan Rainwater Catchment Systems Association, pp.96-100, Matsue Campus, Tottori University, November 10, 2019.
15. Noe Otsuki, Asari Takada, Kazuaki Hiramatsu, Ngoc Anh Trieu, Masayoshi Harada, Toshinori Tabata: Development of a Distributed Runoff Model and Scenario Analyses in Ari Anh Water shed, Southern Vietnam, Proceedings of the 27th Annual Conference of Japan Rainwater Catchment Systems Association, pp.72-75, Matsue Campus, Tottori University, November 10, 2019.
16. Akihiro Fukuda, Toshinori Tabata, Kazuaki Hiramatsu, Masayoshi Harada: Salinity analysis after heavy rainfall in Hakata Bay using 3-dimensional σ-coordinate model, Proceedings of the 2019 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No. 10-34, Fuchu Campus, Tokyo University of Agriculture and Technology, September 6, 2019.
17. Sai Hong Anh, Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: Scenario analyses for the emergency solution to protect Hanoi Capital from flood disaster of the Red River, Proceedings of the 2019 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No. 10-27, Fuchu Campus, Tokyo University of Agriculture and Technology, September 6, 2019.
18. Asari Takada, Kazuaki Hiramatsu, Ngoc Anh Trieu, Masayoshi Harada, Toshinori Tabata: Proposal of optimization method for effective Rule Curves for water supply and flood control of a multipurpose reservoir in Southeast Asian watershed, Proceedings of the 2019 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No. 5-43, Fuchu Campus, Tokyo University of Agriculture and Technology, September 6, 2019.
19. Misaki Kawara, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata: Experimental Study on Bactericidal Effect of Copper Ion for Phytoplankton Growth under Eutrophic Condition, Proceedings of the 2019 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No. 5-25, Fuchu Campus, Tokyo University of Agriculture and Technology, September 5, 2019.
20. Masayoshi Harada, Tran Tuan Thach, Kazuaki Hiramatsu and Toshinori Tabata: Water Quality Dynamics above Bottom Sediment under Long-term Anaerobic Condition in Organically Polluted Reservoir, Proceedings of the 2019 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No. 5-23, Fuchu Campus, Tokyo University of Agriculture and Technology, September 5, 2019.
21. Takuma Kobayashi, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata: Seasonal Change of Phytoplankton in Hyper-eutrophic Water Area under Nitrogen Limitation, Proceedings of the 2019 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No. 5-11, Fuchu Campus, Tokyo University of Agriculture and Technology, September 5, 2019.
22. Makoto Fukui, Kazuaki Hiramatsu, Shinji Fukuda, Masayoshi Harada and Toshinori Tabata: Development of long-term rainfall-runoff model and scenario analyses for water saving effect of rice farming in the Ibague Watershed, Proceedings of the 2019 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No. 5-3, Fuchu Campus, Tokyo University of Agriculture and Technology, September 4, 2019.
23. Mai Quoc Khanh, Kazuaki Hiramatsu, Toshinori Tabata and Masayoshi Harada, Numerical Simulations of Discharge Change Propagation in Open Channel Irrigation Systems, 6th JASID (The Japan Society For International Development) Western Japan Research Meeting, 2019.08.
24. Sai Hong Anh, Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada, An Optimal Scenario for the Emergency Solution to Protect the Hanoi Capital from Flood Disaster of the Red River by Using the Van Coc Lake, 6th JASID (The Japan Society For International Development) Western Japan Research Meeting, 2019.08.
25. Vu Thi Hoai Thu, Assessing the effects of sea level rise and sea dike construction on salinity distribution of the Can Gio Bay, Southern Vietnam, East Asian Summit Workshop on Estuary Harnessing, Protection and Management, 2019.08.
26. Asari Takada, Kazuaki Hiramatsu, Trieu Anh Ngoc, Masayoshi Harada and Toshinori Tabata: Towards the proposal of optimum operation method for a multipurpose reservoir considering flood control and water supply in Southeast Asian watershed, The 31 Symposium of Research Group of Hydrology and Water Environment of the Japanese Society of Irrigation, Drainage and Rural Engineering, November 30, 2018, Kobushi Hall, Faculty of Agriculture, Ibaragi University.
27. Akinori Ozaki, Kazuaki Hiramatsu and Takehide Hama, Survey of Agricultural Reservoirs Damaged by Torrential Rains in Northern Kyushu on July 2017, International Conference 2018 of the International Society of Paddy and Water Environment Engineering (PAWEES) and International Network for Water and Ecosystem in Paddy Fields (INWEPF), 2018.11, [URL], The torrential rains that hit northern Kyushu, Japan, on July 5–6, 2017, caused serious damage, especially in Asakura City, Fukuoka Prefecture, and in Hita City, Oita Prefecture. The primary meteorological mechanism that caused these torrential rains can be summarized as record-breaking heavy rains caused by linear rainbands in northern Kyushu. These heavy rains triggered hillside collapse, with the massive volume of driftwood and soil destroying downstream areas. Shortly after the immediate damage caused by the torrential rains was confirmed, the agricultural reservoirs were suspected to have exacerbated the flood damage in downstream areas. However, it is considered that the reservoirs helped mitigate flood impacts. To verify the disaster mitigation effect of the reservoirs on these torrential rains, the Japan Society of Irrigation, Drainage and Rural Engineering (JSIDRE) organized a survey team to investigate the damaged agricultural reservoirs in Asakura City. From the survey, 4 of 11 surveyed reservoirs were confirmed ravaged because of the massive driftwood and soil volume from the hillside area. However, the other reservoirs remained intact, and two distinctive characteristics were found to have helped prevent the flood from worsening. One was the reservoirs’ capacity to store soil; they had a large water capacity, and their strong walls kept the soil inside at their full water level. The other was spillway type and location. The reservoirs that had side-overflow spillways were able to discharge driftwood. Therefore, the water storage capacity of the reservoirs, dike strength, and spillway type and location are important factors that may help mitigate flooding..
28. Asari Takada, Kazuaki Hiramatsu, Trieu Anh Ngoc, Masayoshi Harada and Toshinori Tabata, Development of an optimizing method for the operation rule curves of multi-purpose reservoir in Southeast Asian watershed, International Conference 2018 of the International Society of Paddy and Water Environment Engineering (PAWEES) and International Network for Water and Ecosystem in Paddy Fields (INWEPF), 2018.11, [URL], Water scarcity in the dry season and flooding in the rainy season constitute major problems for developing countries located within the tropical climatic region of Southeast Asia. In addition, regional water consumption is increasing and water usage patterns are changing because of lifestyle changes and recent socioeconomic activities. Therefore, an advanced framework for water resource management that considers both water supply and flood control is needed urgently. Multipurpose reservoirs are used widely to manage water resources efficiently; however, water-related problems occur for reservoirs in watersheds in Southeast Asia because of inadequate operation rule curves. We developed a method for constructing optimal operation rule curves for Dau Tieng Reservoir, which is one of the largest multipurpose reservoirs in Vietnam. The reservoir is used for flood control, domestic water supply, industrial uses, regulation of environmental flows, and agricultural uses in order of priority. The operation rule curves of the Dau Tieng Reservoir comprise five reference water levels: the retarding water level, upper water level, lower water level, critical water level, and dead water level. Water release from the reservoir is determined based on the relationship between the reservoir level and the rule curves. In this study, the rule curves were newly determined using the SCE-UA global optimization method (Shuffled Complex Evolution method of the University of Arizona). The objective function for optimization was defined by focusing on the improvement of insufficient supply for agricultural uses and environmental flow downstream of the Dau Tieng Reservoir. Inadequate solutions were prevented by introducing penalty functions into the objective function. Following the optimization, it was concluded that the proposed optimization method efficiently searched for rule curves considered effective for ensuring both flood control and water supply..
29. Toshinori Tabata, Wataru Hayashi, Akihiro Fukuda, Kazuaki Hiramatsu and Masayoshi Harada, Development of Three Dimensional Dissolved Oxygen Model in the Ariake Sea, Japan, International Conference 2018 of the International Society of Paddy and Water Environment Engineering (PAWEES) and International Network for Water and Ecosystem in Paddy Fields (INWEPF), 2018.11, [URL], In semi-enclosed bay in Japan, due to eutrophication accompanying high economic growth in the 1960's, the occurrence of anoxic water mass has been a serious problem and its dynamic analysis has been the urgent issue. Currently, the most widely used model for analyzing the dynamics of anoxic water mass is the ecosystem model. The ecosystem model can model the material circulation in the area in detail, and can analyze the influential factors precisely. However, as the number of required state variables increases, the number of parameters to be determined also increases. Therefore, the ecosystem model requires not only a long time calculation but also a considerable period to build the model. Therefore, in this study, a three dimensional dissolved oxygen (DO) model was constructed in the Ariake Sea where dynamic analysis of anoxic water mass is required. DO model is a model that adds a net oxygen consumption term to the turbulent diffusion equation of DO and is much more simply than an ecosystem model. In the previous studies, the DO model was applied only to a vertical one-dimensional model, and the oxygen consumption term was given as a constant. In this study, DO model was applied to a three-dimensional model and analyzed dynamics of anoxic water mass by giving seasonal change and locational change to oxygen consumption term. As a result, it was possible to reproduce the anoxic water mass generated in 2010 in the Ariake Sea. Although the reproduction of the short-term fluctuation of DO was a future task, the DO model developed in this study was an effective method for analyzing the dynamics of anoxic water mass in the Ariake Sea..
30. Misaki Kawara, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata: Basic Study on Control of Phytoplankton Growth by Bactericidal Effect of Copper Ion, 2018 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, October 25, 2018, Hotel Kumamoto Terrsa, Kumamoto City, Japan.
31. Makoto Fukui, Kazuaki Hiramatsu, Masayoshi Harada, Toshinori Tabata and Shinji Fukuda: Development of long-term runoff model and scenario analysis for water saving in the South American watershed, 2018 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, October 25, 2018, Hotel Kumamoto Terrsa, Kumamoto City, Japan.
32. Mitsuhiro Inoue,Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: Numerical Anaiyses of Stream Regime and Sediment Transport at Yamada-zeki Headworks in Chikugo River, 2018 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, October 25, 2018, Hotel Kumamoto Terrsa, Kumamoto City, Japan.
33. Takuma Kobayashi, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata: Influence of envioronmental factors on the seasonal changing of phytoplankton in eutrophic water area, 2018 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, October 25, 2018, Hotel Kumamoto Terrsa, Kumamoto City, Japan.
34. Vu Thi Hoai Thu, Toshinori Tabata, Kazuaki Hiramatsu, Trieu Anh Ngoc and Masayoshi Harada, Assessing Spatial Distribution of River Water Quality in Can Gio Mangrove Forest, International Symposium on Lowland Technonogy (ISLT 2018), 2018.09, [URL], The Can Gio mangrove forest, located in Ho Chi Minh City in Vietnam, has been an important environmental conservation focus for this region. Over time, the Can Gio mangrove forest has been negatively affected by erosion and environmental degradation caused by climate change and human activities. In this region, the Soai Rap and Long Tau Rivers, located at the downstream end of the Saigon River Basin, significantly affect the hydrodynamic regime of their subbranches. As such, the water quality of the Soai Rap and Long Tau Rivers directly affects the environmental health of the Can Gio mangrove forest. In this study, we used different technologies to assess the water quality along the Soai Rap and Long Tau Rivers based on various water quality indices including dissolved oxygen (DO), oxidation reduction potential (ORP), turbidity, pH, and salinity. These indices were measured continuously using commercial sensors and data loggers attached to the side of a moving boat and were combined with water depth and geographic information system (GIS) location data. Additional salinity data was collected using commercial data loggers for an extended time at upstream (Phu Xuan) and midpoint (Nga Bay) locations in the Can Gio mangrove forest, and salinity profiles were developed at select points along the Soai Rap and Long Tau Rivers. Field results indicated that several water quality indices varied by spatial location. The DO ranged from 4.90 to 6.46 mg/L, depending on river location. Similarly, the pH was consistently higher than 6.90 but differed between primary and secondary river locations. The salinity also differed considerably, depending on the river cross section, river depth, and distance to the sea. Conversely, the ORP and turbidity did not differ by location but were instead affected by the river’s flow conditions and human activities..
35. Asari Takada, Kazuaki Hiramatsu, Trieu Anh Ngoc, Masayoshi Harada and Toshinori Tabata, Development of a mesh-based distributed runoff model incorporated with tank models of several land utilizations in a Southeast Asian watershed, The 21st Congress of International Association for Hydro-Environment Engineering and Research (IAHR), Asia Pacific Division (APD), 2018.09, [URL], We propose a new long-term rainfall-runoff model for a Southeast Asian watershed. To reflect the impact of land use changes associated with rural development, and the nonuniformity of rainfall in tropical regions, a mesh-based distributed runoff model was constructed. Four tank models (paddy, upland field, urban, and forest) were incorporated into each mesh element, to capture the outflow from different land uses. Each mesh element was connected to the river network to reproduce the rainfall-runoff flow processes. By incorporating a watershed groundwater tank, we improved the representation of the baseflow component which is important in long-term runoff analysis. To shorten the calculation time and improve the application to other watersheds, we introduced an inflow/outflow matrix that defines the direction of rainwater flow between adjacent mesh elements. The model was applied to the Dau Tieng watershed in Southern Vietnam, with an area of 2,700 km2. The model was run for the period 1999-2009, and the calculated discharge was compared with the observed values, and a good model fit was achieved. As the model represents the flow processes from rainfall to river discharge with highly versatile tank models, it can be applied to watersheds where hydrological data for model verification are scarce, which is a common issue for many developing countries in Southeast Asia..
36. Toshinori Tabata, Kodai Nakashima, Kazuaki Hiramatsu and Masayoshi Harada, Investigation of the effects of human activities using multi-box ecosystem model in the Ariake Sea, Japan, The 21st Congress of International Association for Hydro-Environment Engineering and Research (IAHR), Asia Pacific Division (APD), 2018.09, [URL], In this research, the effect of human activities has been investigated in the Ariake Sea located in Kyushu Island, Japan. The Ariake Sea has been suffering from environmental degradation for more than a decade with unstable fisheries productivity. Therefore, it is important to understand the change of environmental characteristics in the Ariake Sea quantitatively. Moreover, it is concerned that the fertilizer applied for the aquaculture is effecting to the ecosystem in the sea. Also, since nutrient loading from rivers are so high that red tide or anoxic water mass occurs every year, it is significant to evaluate the effect of nutrient load to the sea. Therefore, in order to characterize the coastal environment and investigate the effect of human activities, Muti-Box Ecosystem model have constructed to simulate the water quality items in the Ariake Sea. The sea was divided into 12 boxes. Each box is comprised of three layers which is water, oxidative bottom and reductive bottom layer. Simulation period was set from 1st January 2000 to 31st December 2012. The model reproduced the water quality items well. Then, the model calculated with two different scenarios about the fertilizer application to the aquaculture and nutrient load from the river. The result showed that the fertilizer for the aquaculture has no effect to the coastal ecosystem and coastal environment would improve if the nutrient load reduced by half..
37. Masayoshi Harada, Tran Tuan Thach, Kazuaki Hiramatsu and Toshinori Tabata, Biochemical characteristics of water quality dynamics near the bottom sediment under anaerobic state in the organically polluted reservoir, The 21st Congress of International Association for Hydro-Environment Engineering and Research (IAHR), Asia Pacific Division (APD), 2018.09, [URL], Anoxic conditions, occurring in enclosed water bodies from an overabundance of organic matter, cause further deterioration of the aquatic environment through nutrient elution and hydrogen sulfide production. The quantitates of biochemical reactions under anaerobic state, such as denitrification, iron reduction and sulfate reduction are important research topics when considering conservation and improvement of water quality environment. This study involved regular observations for two years in the reservoir, in which overabundant organic matter was prominent due to humic acid, to evaluate the water quality dynamic near the bottom during long-term anoxic periods. Based on the temporal changes of dissolved oxygen, nitrate-nitrogen, ammonia-nitrogen, phosphate-phosphorus, sulfide, total iron ions and sulfate, this study focused specifically on the influence of the redox state of the sediment surface during the early stage of thermal stratification on the anaerobic biochemical reactions. As a result, nitrate-nitrogen started to decrease to zero due to denitrification as soon as the anoxic sate occurred, and then both ammonia-nitrogen and phosphate-phosphorus increased linearly with time due to iron reduction after nitrate-nitrogen had decreased to zero. Sulfide began to increase linearly due to sulfate reduction as soon as nitrate-nitrogen disappeared. Also, the initial redox state of sediment impacted on the change characteristics of phosphate-phosphorus, ammonia-nitrogen and sulfide in the points of increasing timings, duration and rates. It was concluded that our results would provide important finding about the mechanisms of aqueous environmental deterioration due to organic pollution as well as beneficial information for the modification of water quality prediction model..
38. Akihiro Fukuda, Toshinori Tabata, Yori Honda, Kazuaki Hiramatsu and Masayoshi Harada, Simulation of large fresh water behavior in Hakata Bay due to torrential rain using nested two-dimensional model, The 21st Congress of International Association for Hydro-Environment Engineering and Research (IAHR), Asia Pacific Division (APD), 2018.09, [URL], In this study, a numerical simulation consisting of a two-dimensional model of Hakata Bay, Kyushu Island, Japan, was conducted to analyze the impact of large river discharges due to torrential rain. Since Fukuoka city, one of the largest cities in Japan, surrounds Hakata Bay, the bay has a very complex environment, including an artificial island (Island City) in its eastern region and small bay (Imazu Bay) where tideland is spread with rich ecosystems in its western region. Tank models were applied to calculate the discharges of the 38 rivers that flow into Hakata Bay, and a two-way nesting technique, “edge nesting,” was developed and applied in the model to capture the influence of complex geographical features, such as the Island City area and the Imazu Bay area, which were nested with a high resolution mesh. The model accurately reproduced the observed tidal current and salinity data. To simulate the behavior of large river discharges, an historical simulation period including a torrential rain event (163.5 mm/d) was input into the model. The results showed that after the rain event, low-salinity water covered the entire inner part of Hakata Bay, and fresh water covered the entire area of the tidal flats and flowed out from the mouth of Imazu Bay. The behavior of this large mass of fresh water was remarkably different from usual discharge river flow. These results indicate that the environment in the bay can be significantly changed by torrential rain events.
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39. Akihiro Fukuda, Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: Simulation of Large Fresh Water Behavior Using Nested Two-Dimensional Model, the 2017 Annual Conference of Applied Hydraulics Research Divison of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2017.12.
40. Toshinori Tabata, Akihiro Fukuda, Wataru Hayashi, Kazuaki Hiramatsu and Masayoshi Harada: Development of Three-Dimensional Sigma Coordinate Model for the Dynamic Analysis of Anoxic Water Mass in the Ariake Sea, the 2017 Annual Conference of Applied Hydraulics Research Divison of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2017.12.
41. Mitsuhiro Inoue, Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: The flow analysis of Yamada weir by two dimensional numerical model, the 2017 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2017.11.
42. Kosuke Hayami, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata: Vertically-one-dimensional numerical analysis in a stratified closed water body considering convection flow due to surface cooling, the 2017 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2017.11.
43. Vu Thi Hoai Thu, Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada, Impact assessment of sea level rise and sea dike construction on Flood Inundation in Can Gio Bay, South of Vietnam, International Symposium on Agricultural, Food, Environmental and Life Sciences in Asia (AFELiSA 2017), 2017.11.
44. Tran Tuan Thach, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata, Improvement of vertical one-dimensional prediction model of water quality based on ecosystem model in an organically polluted reservoir, International Symposium on Agricultural, Food, Environmental and Life Sciences in Asia (AFELiSA 2017), 2017.11.
45. Sai Hong Anh, Toshinori Tabata, Kazuaki Hiramatsu, Masayoshi Harada and Le Viet Son, Impact of Flood to Residential Areas in Van Coc Lake, Hanoi Vietnam, the 2017 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2017.08.
46. Akihiro Fukuda, Toshinori Tabata, Yuri Honda, Kazuaki Hiramatsu and Masayoshi Harada: Behavior of Large Fresh Water Discharges into Hakata Bay Due to Torrential Rain Using Two-Dimensional Convective-Dispersive Model, he 2017 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2018.08.
47. Toshinori Tabata, Kodai Nakashima, Kazuaki Hiramatsu and Masayoshi Harada: Evaluation of Human Activity for Coastal Environment Using Multi-Box Ecosystem Model in the Ariake Sea, the 2017 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2017.08.
48. Masayoshi Harada, Miki Ichiyasu, Kazuaki Hiramatsu and Toshinori Tabata: Evaluation on Effects of Water Quality Improvement by LED Irradiation considering Impact of Macroalgae on Oxygen Production, the 2017 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2017.08.
49. Toshinori Tabata, Wataru Hayashi, Emi Otsubo, Kazuaki Hiramatsu and Masayoshi Harada, Appropriate Water Quality Environment for Protecting the Coastal Ecosystem in the Ariake Sea, Japan, The 37th World Congress of the International Association for Hydro-Environment Engineering and Research (IAHR), 2017.08.
50. Asari Takada, Kazuaki Hiramatsu, Masayoshi Harada and Toshinori Tabata: Development of a Distributed Flood Runoff Model Integrated with an Inflow/Outflow Matrix, Proceedings of the 2016 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 140-143, 2016.
51. Wataru Hayashi, Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: Cluster analysis of the environment in the Ariake sea using geostatistical analysis, Proceedings of the 2016 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 138-139, 2016.
52. Akihiro Fukuda, Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: Application of the Three Dimensional Sigma Coordinate Hydrodynamic Model in the Hakata Bay, Proceedings of the 2016 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 136-137, 2016.
53. Vu Thi Hoai Thu, Toshinori Tabata, Kazuaki Hiramatsu, Trieu Anh Ngoc, Harada Masayoshi, Effects of tides and upstream flow on inundation of Can Gio mangrove forest, Vietnam, 2016 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2016.09.
54. Toshinori Tabata, Kodai Nakashima, Kazuaki Hiramatsu and Masayoshi Harada: Environment Assessment of the Ariake Sea using Multi -Box Ecosystem Model, Proceedings of the 2016 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No.10-4, 2016.
55. Masayoshi Harada, Koudai Akiba, Kazuaki Hiramatsu and Toshinori Tabata: Influence of Dissolved Organic Matter and Oxidation Sate of Bottom Sediment on Water Quality Dynamics under the Anaerobic Condition, Proceedings of the 2016 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No.5-19, 2016.
56. Hoang Quang Duong, Takayoshi Nishioka, Harada Masayoshi, Kazuaki Hiramatsu, Toshinori Tabata, Water Quality Dynamic above the Bottom Sediment under an Anaerobic State in an Organic Polluted Reservoir, 2016 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2016.08.
57. Ayaka Oniki, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata: Influence of Long-term Anoxic State on Improvement Effect of DO Environment in an Organic Polluted Water Body using an Underwater LED, Proceedings of the 2016 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper No.5-16, 2016.
58. Sai Hong Anh, Toshinori Tabata, Kazuaki Hiramatsu, Harada Masayoshi, Le Viet Son, A research about the behaviors of floodwaters in Van Coc lake in case of receiving floodwaters from Red river, The 3rd JASID(The Japan Society For International Development) Western Japan Research Meeting, 2016.08.
59. Shinji Fukuda, Kazuaki Hiramatsu, Harada Masayoshi, Assessment of depth measurement using an acoustic Doppler current profiler and a CTD profiler in a small river in Japan, The 9th International Conference on Intelligent Robotics and Applications, ICIRA2016, 2016.08.
60. Masayoshi Harada, Yosuke Kawano, Kazuaki Hiramatsu, Toshinori Tabata: Experimental study on improvement effect of DO environment in an organic polluted water body using an underwater LED considering optical absorption property of chlorophyll a, AH-JSIDRE..
61. Vu Thi Hoai Thu, Toshinori Tabata, Kazuaki Hiramatsu, Harada Masayoshi, Applying a Two-Dimensional Finite Difference Model with a Wet and Dry Scheme to Cangio Bay, Vietnam, Joint Symposium between Kyushu University and Vietnam National University of Agriculture, 2015.11.
62. Toshinori Tabata, Emi Otsubo, Kazuaki Hiramatsu, Harada Masayoshi, Evaluation of Environmetal Influence to the Bivalve Production in the Ariake Sea using Artificial Neural Network, Joint Symposium between Kyushu University and Vietnam National University of Agriculture, 2015.11.
63. Takayoshi Nishioka, Harada Masayoshi, Kazuaki Hiramatsu, Toshinori Tabata, Analysis of Water Quality Dynamics under the Anaerobic State in a Closed Water Body by Laboratory Enperiment, Joint Symposium between Kyushu University and Vietnam National University of Agriculture, 2015.11.
64. Kodai Nakashima, Kazuaki Hiramatsu, Toshinori Tabata, Harada Masayoshi, Environmental Assessment of the Ariake Sea using a Multi-Box Ecosysytem Model, Joint Symposium between Kyushu University and Vietnam National University of Agriculture, 2015.11.
65. Hoang Quang Duong, Takayoshi Nishioka, Harada Masayoshi, Kazuaki Hiramatsu, Quantitative Estimation of Water Quality Dynamics under the Anoxic Condition near the Bottom of an Organic Polluted Reservoir, Joint Symposium between Kyushu University and Vietnam National University of Agriculture, 2015.11.
66. Masayoshi Harada, Kazuaki Hiramatsu, Toshinori Tabata, Kohei Nishiyama: Quantitative Assessment of Inhibition Effects of Algae Growth in a Farm Pond by Partially Floating Lightshading Boards, the 2015 Annual Conference of the JRCSA, 2015.11.1, Nagoya..
67. Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: Development of the Three Dimensional Sigma Coordinate Hydrodynamic Model in the Ariake Sea, the 2015 Annual Conference of Kyushu-Okinawa Branch of the JSIDRE, 2015.10.28, Naha, Japan..
68. Ayaka Oniki, Masayoshi Harada, Kazuaki Hiramatsu and Toshinori Tabata: Influence of Nitrate Nitrogen on Water Quality Dynamics under the Anaerobic Condition, the 2015 Annual Conference of Kyushu-Okinawa Branch of the JSIDRE, 2015.10.28, Naha, Japan..
69. Shinji Fukuda, Kazuaki Hiramatsu, Akihiko Kamoshita, Kensuke Okada and Mana: Contribution of Rural Engineering to Latin American Low-input Rice Production System, the 2015 Annual Conference of the JSIDRE, 2015.9.2, Okayama, Japan..
70. Masayoshi Harada, Kaede Matsutor and Kazuaki Hiramatsu: A Basic Study on Water Quality Improvement Technique using an Underwater LED in an Organic Polluted Reservoir, the 2015 Annual Conference of the JSIDRE, 2015.9.1, Okayama, Japan..
71. Toshinori Tabata, Emi Otsubo, Kazuaki Hiramatsu and Masayoshi Harada: The Investigation of Decreasing Production of Bivalve in the Ariake Sea using Artificial Neural Network Model, the 2015 Annual Conference of the JSIDRE, 2015.9.1, Okayama, Japan..
72. Takayoshi Nishioka, Masayoshi Harada and Kazuaki Hiramatsu: Characteristic of Water Quality Dynamics under the Anaerobic State near the Bottom of an Organic Polluted Reservoir, the 2015 Annual Conference of the JSIDRE, 2015.9.1, Okayama, Japan..
73. Shinji Fukuda, Luis Armando Castilla, Lorena López-Galvis, Taro Takahashi, Akihiko Kamoshita, Kensuke Okada, Kazuaki Hiramatsu, Application of Random Forests for modelling rice yield from monthly weather data in Ibague, Colombia, The 1st International Conference on Asian Highland Natural Resources Management,International Conference, 2015.01.
74. Nguyen Viet Anh, Kazuaki Hiramatsu, Shinji Fukuda, Masayoshi Harada, Application of the SWAT model and the indicators hydrologic alteration (IHA) method to hydrologic cycle assessment in the Cong Watershed, Vietnam, Tthe 8th International Symposium on the East Asian Environmental Problems (EAEP2014), 2014.12.
75. Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: Characterization of the Water Quality in the Ariake Sea for the Environmental Improvement, the 2014 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2014.10.29, Saga, Japan.
76. Takayoshi Nishioka, Masayoshi Harada and Kazuaki Hiramatsu: Analyses of Water Quality Dynamics in the Anoxic State due to Organic Pollution by Laboratory Experiment, the 2014 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2014.10.29, Saga, Japan.
77. Masayoshi Harada, Kazuaki Hiramatsu, Shinji Fukuda, Short-term Prediction of Chlorophyll-a in a Eutrophic Closed Water Body using Chaos Recurrent Neural Network, The 19th Congress of Asia and Pacific Division of the International Association of Hydraulic Engineering and Research, 2014.09.
78. Shinji Fukuda, Masayoshi Harada and Kazuaki Hiramatsu: Evaluation of applicability of ultra-sonic telemetry to micro-habitat survey in small-scale rivers, Annual Autumn Conference of The Japanese Society of Fisheries Sciences, 2014.9.21, Fukuoka, Japan.
79. Shinji Fukuda, Taichi Tanakura, Kazuaki Hiramatsu and Masayoshi Harada: Application of 2D Ecohydraulic model for assessing fish habitat quality and its diversity, the 2014 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2014.8.27, Niigata, Japan.
80. Osama Eljamal, Kazuaki Hiramatsu, Masayoshi Harada, MODELING OF PHOSPHORUS RETENTION IN CALCIUM CARBONATE MATERIALS; MODEL APPLICATION TO COLUMN EXPERIMENTS, JSPS Core-to-Core Program SOWAC Project 2014 Fifth Joint Seminar between Water Resources University, Vietnam and Kyushu University, Japan, 2014.08.
81. Trieu Anh Ngoc, Dang Dong Nguyen, Vu Thi Hoai Thu, Kazuaki Hiramatsu, FRAMEWORK FOR FLOOD DAMAGE ASSESSMENT CONSIDERING ABNORMAL CONDITIONS BY USING THE HYDRAULIC AND GIS MODELING, JSPS Core-to-Core Program SOWAC Project 2014 Fifth Joint Seminar between Water Resources University, Vietnam and Kyushu University, Japan, 2014.08.
82. Nguyen Viet Anh, Shinji Fukuda, Kazuaki Hiramatsu, Masayoshi Harada, APPLICATION OF SWAT MODEL TO THE HYDROLOGIC CYCLE AND SEDIMMENT TRANSPORT ASSESSMENT IN THE CONG WATERSHED, VIETNAM, JSPS Core-to-Core Program SOWAC Project 2014 Fifth Joint Seminar between Water Resources University, Vietnam and Kyushu University, Japan, 2014.08.
83. Toshinori Tabata, Kazuaki Hiramatsu, Masayoshi Harada, Numerical Analysis for Effective Transplant and Seabed Restoration for Recovery of Pen shell Resources in the Ariake Sea, Japan, The 2014 5th International Conference on Environmental Engineering and Applications (ICEEA 2014), 2014.07.
84. Shinji Fukuda, Keisuke Tanaka, Mio Hanada, Masayoshi Harada, Kazuaki Hiramatsu, Application of ultrasonic telemetry for habitat suitability assessment of freshwater fish: a case study in a small river in Japan, International Symposium on Ecohydraulics (ISE2014), 2014.06.
85. Taichi Tanakura, Shinji Fukuda, Kazuaki Hiramatsu and Masayoshi Harada: Microhabitat assessment by an ecohydraulic model using machine learning, 2013 Annual Conference of Kyushu Branch of the Ecology and Civil Engineering Society, December 2013.
86. Shinji Fukuda, Kazuaki Hiramatsu, and Masayoshi Harada: Discussion on the impact of the quality of habitat data on species distribution modelling, 2013 Annual Conference of Kyushu Branch of the Ecology and Civil Engineering Society, December 2013.
87. Do Thuy Nguyen, Kazuaki Hiramatsu, Masayoshi Harada, Development of mathematical model to simulate the water quality of a reservoir under scarce underwater light environment, The 7th International Symposium on the East Asian Environmental Problems (EAEP2013), 2013.11.
88. Nguyen Viet Anh, Shinji FUKUDA, Kazuaki Hiramatsu, Masayoshi Harada, Application of SWAT model to hydrologic cycle assessment in the Cong watershed, Vietnam, The 7th International Symposium on the East Asian Environmental Problems (EAEP2013), 2013.11.
89. Yosuke Kawano, Masayoshi Harada, Kazuaki Hiramatsu and Shinji Fukuda: Development of Water Quality Improvement Technique for Dysoxic Water Body using White-LED, Proceedings of the 2013 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, pp.8-11, November 2013.
90. Masayoshi Harada, Kazuaki Hiramatsu, Shinji Fukuda and Narumi Tada: Water Environment Analysis of Eutrophic Reservoirs based on Survey of Water Quality and Phytoplankton, Proceedings of the 2013 Annual Conference of Kyushu-Okinawa Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, pp.4-7, November 2013.
91. Shinji Fukuda, Marie Yamaguchi, Norio Onikura, Kazuaki Hiramatsu, Masayoshi Harada, and Jun Nakajima: Random Forests as a tool to assess habitat suitability of seven bittering species in northern Kyushu, Japan, Proceedings of the 2013 Symposium of the Ichthyological Society of Japan, Paper Number 6, October 2013.
92. Shinji FUKUDA, Marie Yamaguchi, Norio Onikura, Jun Nakajima, Masayoshi Harada, Kazuaki Hiramatsu, Application of Random Forests for assessing the invasion risk by the non-native rosy bittering subspecies Rhodeus ocellatus ocellatus in northern Kyushu, Japan, ISEM2013, 2013.10, [URL].
93. Shinji Fukuda, Marie Yamaguchi, Norio Onikura, Kazuaki Hiramatsu, Masayoshi Harada, and Jun Nakajima: Modelling co-occurrence patterns of the non-native rosy bittering subspecies and native bittering species using random forests, Proceedings of the 17th Conference of the Ecology and Civil Engineering Society, Paper Number G30, September 2013
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94. Masayoshi Harada, Takeshi Sakuragi, Kazuaki Hiramatsu and Shinji Fukuda: Quantitative Estimation of Water Quality Environment under the Anaerobic State in an Organic Polluted Reservoir, Proceedings of the 2013 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper Number 6-42, September 2013
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95. Ayaka Kanda, Trieu Anh Ngoc, Kazuaki Hiramatsu, Masayoshi Harada and Shinji Fukuda: Estimation of Land Use by Satellite Remote Sensing and Prediction of Nutrient Runoff Load by Unit Load Method in a Data-Scarce Watershed, Proceedings of the 2013 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper Number 2-31, September 2013
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96. Shinji Fukuda, Marie Yamaguchi, Norio Onikura, Jun Nakajima, Kazuaki Hiramatsu and Masayoshi Harada: Effects of initial conditions on habitat modeling using Random Forests, Proceedings of the 2013 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper Number 2-19, September 2013
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97. Yori Honda, Kazuaki Hiramatsu, Toshinori Tabata, Masayoshi Harada and Shinji Fukuda: Examination of Nesting Techniques in Small-scale Coastal Waters, Proceedings of the 2013 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper Number 4-01, September 2013
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98. Osama Eljamal, Junya Okawauchi, Kazuaki Hiramatsu, SOIL COLUMN EXPERIMENTS TO STUDY THE REMOVAL OF PHOSPHORUS FROM WATER, JSPS Core-to-Core Program SOWAC Project 2013 Third Joint Seminar between Water Resources University, Vietnam and Kyushu University, Japan, 2013.08, [URL].
99. Trieu Anh Ngoc, Kazuaki Hiramatsu, Masayoshi Harada, DEVELOPMENT OF MATHEMATICAL MODEL FOR OPTIMIZING OPERATION OF MULTI-PURPOSE RESERVOIR IN BALANCE OF HUMAN AND ENVIRONMENT FLOW REQUIREMENTS, JSPS Core-to-Core Program SOWAC Project 2013 Third Joint Seminar between Water Resources University, Vietnam and Kyushu University, Japan, 2013.08, [URL].
100. Nguyen Do Thuy, Masayoshi Harada, Kazuaki Hiramatsu, GENERATION OF HYDROGEN SULFIDE IN THE DEEPEST PART OF A RESERVOIR UNDER ANOXIC WATER CONDITIONS, JSPS Core-to-Core Program SOWAC Project 2013 Third Joint Seminar between Water Resources University, Vietnam and Kyushu University, Japan, 2013.08, [URL].
101. Kazuaki Hiramatsu, Mathematical Tools for Water Environment Conservation from a View Point of Integrated Watershed Management, JSPS Core-to-Core Program SOWAC Project 2013 Third Joint Seminar between Water Resources University, Vietnam and Kyushu University, Japan, 2013.08, [URL].
102. Toshinori Tabata, Kazuaki Hiramatsu, Masayoshi Harada and Shinji Fukuda: A Study of Resource Conservation in the Ariake Sea Using a Two-Dimensional Convective-Dispersion Model, Proceedings of 2012 Annual Conference of Applied Hydrailics Research Divison of the Japanese Society of Irrigation, Drainage and Rural Engineering, pp.53-59, December 2012
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103. Trieu Anh Ngoc, Kazuaki Hiramatsu, Harada Masayoshi, Optimal Operation of Multi-purpose Reservoir by Constrained Genetic Algorithms, 6th International Symposium on the East Asian Environmental Problems (EAEP2012), 2012.11.
104. Taichi Tanakura, Shinji Fukuda, Kazuaki Hiramatsu and Masayoshi Harada: Fish Habitat Assessment of Agricultural Canal using a Two-Dimensional Hydrodynamic Model and Support Vector Machines, Proceedings of the 2012 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, pp.172-173, November 2012.
105. Toshinori Tabata, Kazuaki Hiramatsu, Masayoshi Harada and Michinobu Hirose: Numerical Simulation on Predicting Pen Shell Larvae Distribution aiming to Investigate the Effective Ground to Implement Seabed Improvement, Proceedings of the 2012 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, pp.14-15, November 2012.
106. Junya Okawauchi, Osama Eljamal, Kazuaki Hiramatsu and Masayoshi Harada: Phosphorus Adsorption Characteristics Using Natural Materials and their Mathematical Modeling, Proceedings of the 2012 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, pp.12-13, November 2012.
107. Tomochika Shimoda, Masayoshi Harada and Kazuaki Hiramatsu: Experimental Study on Effectiveness of Water Quality Improvement Technology using Light Emitting Diodes, Proceedings of the 2012 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, pp.6-7, November 2012.
108. Yuri Honda, Kazuaki Hiramatsu, Harada Masayoshi, Comparative Study on Two Nesting Techniques of Overlap and Sponge-Layer in Two-dimensional Numerical Calculations of Tidal Currents in Coastal Waters , 2012.10.
109. Toshinori Tabata, Kazuaki Hiramatsu, Harada Masayoshi, Optimal Configuration of Nori Aquafarming Grounds in the Ariake Sea using a Two-dimensional Convective-Dispersion Model and an index of Nitrogen Assimilation Rates, 4th International Conference on Estuaries and Coasts, ICEC2012, 2012.10.
110. Nguyen Manh Hung, Le Van Chinh, Kazuaki Hiramatsu, Harada Masayoshi, Dao Ngoc Tuan, Scenario Analyses of Flood Inundation Using a Distributed Tank Model in an Urbanizing Agricultural Area of Song Nhue Hydraulic Structure Scheme in Hanoi, Joint Symposium between Kyushu University and Hanoi University of Agriculture - Innovative Approaches to Land, Water and Environmenttal Research in Vietnam and Japan, 2012.09.
111. Masayoshi Harada, Akifumi Douma, Kazuaki Hiramatsu and Atsushi Marui: Short-term Prediction of Chlorophyll-a Time Series using Recurrent Neural Network with Periodic Chaos Neurons, Proceedings of the 2012 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper Number 6-33, September 2012
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112. Toshinori Tabata, Kazuaki Hiramatsu, Masayoshi Harada and Michinobu Hirose: Proceedings of the 2012 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper Number 4-10, September 2012.
113. Do Thuy Nguyen, Harada Masayoshi, Kazuaki Hiramatsu, Development of three-dimensional eco-hydrodynamic model for a closed water body under scarce underwater light environment, 平成24年度農業農村工学会大会講演会, 2012.09.
114. Yuri Honda, Kazuaki Hiramatsu and Masayoshi Harada
Study on Nesting Techniques for Tidal Flow Simulations in Coastal Waters: Proceedings of the 2012 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Paper Number 4-08, September 2012
平成24年(2012)9月19日
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115. Taichi Tanakura, Shinji FUKUDA, Kazuaki Hiramatsu, Harada Masayoshi, Effect of Variable Species Distribution Models on the Evaluation of Habitat Suitability for Japanese Medaka (Oryzias Latipes), 9th International Symposium on Ecohydraulics (ISE 2012) , 2012.09.
116. Shinji FUKUDA, Maho Kiyota, Shinya Masuda, Shun-ichiro Ishibashi, Kazuaki Hiramatsu, Harada Masayoshi, Diel Change of Habitat Preference of Japanese Medaka (Oryzias Latipes), 9th International Symposium on Ecohydraulics (ISE 2012) , 2012.09.
117. ELJAMAL OSAMA, Junya Okawauchi, Kazuaki Hiramatsu, Harada Masayoshi, An Investigation of Phosphorus Removal from Aqueous Solution using Byproduct Materials, JSPS Core-to-Core Program SOWAC Project 2012 First Joint Seminar between Water Resources University, Vietnam and Kyushu University, Japan, 2012.08, [URL].
118. Do Thuy Nguyen, Yuichiro Yoshimura, Kazuaki Hiramatsu, Simulating Mechanism of Acid-votile Sulfide in a Regulating Pond with Scarce Underwater Light Environment, JSPS Core-to-Core Program SOWAC Project 2012 First Joint Seminar between Water Resources University, Vietnam and Kyushu University, Japan, 2013.08, [URL].
119. Nguyen Thuy Do,Masayoshi Harada and Kazuaki Hiramatsu: Application of Simple Genetic Algorithm for calibrating an Aquatic Ecosystem Model, Joint Research Conference of Internationnal Environmental Leader Training Programs, 2012.3.10.
120. Le Van Chinh, Haruka Iseri, Kazuaki Hiramatsu, Masayoshi Harada and Makito Mori: Simulation of Raifall Runoff and Pollutant Load using a GIS-based Distributed Parameter Model, a Case Study in Chikugo River Basin in Japan, The 5th International Symposium on the East Asian Environmental Problems (EAEP2011), 2011.11.15.
121. Nguyen Thuy Do, Kazuaki Hiramatsu and Masayoshi Harada: Application of Simple Genetic Algorithms for Calibrating an Aquatic Ecosysytem Model, The 5th International Symposium on the East Asian Environmental Problems (EAEP2011), 2011.11.15.
122. Trieu Anh Ngoc, Kazuaki Hiramatsu and Masayoshi Harada: Optimization of Parameters for Two Conceptual Hydrological Models by using a Genetic Algorithm, The 5th International Symposium on the East Asian Environmental Problems (EAEP2011), 2011.11.15.
123. Nguyen Manh Hung, Le Van Chinh, Kazuaki Hiramatsu, Masayoshi Harada and Dao Ngoc Tuan: Flood Inundation Analysis Using a Distributed Tank Model in an Urbanizing Agricultural Area of Song Nhue Hydraulic Structure Scheme in Hanoi, The 5th International Symposium on the East Asian Environmental Problems (EAEP2011), 2011.11.15.
124. Tsuyoshi Inoue, Junko Shibamoto, Masafumi Aoki, Thai Khanh Phong, Katsunori Yoshino and Kazuaki Hiramatsu: Herbicide Runoff from Paddy Blocks and Water Management by a Water-supply Corporation Part 1: Herbicide Runoff from Paddy Blocks, The 29th Conference of Pesticide Environment Science, 2011.10.28.
125. Kiroku Masuno, Masayoshi Harada, Kazuaki Hiramatsu and Atsushi Marui: Analyses of Water Environments of Eutrophic Reservoirs by Self-organizing Maps, 2011 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2011.10.18.
126. Shun-ichiro Ishibashi, Shinji Fukuda, Kazuaki Hiramatsu and Masayoshi Harada: The evaluation of uncertainty on the optimiziation the parameter of patterns of preference level for Japanese medaka (Oryzias latipes), 2011 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2011.10.18.
127. Masayoshi Harada, Kazuaki Hiramatsu, Takafumi Tominaga and Atsushi Marui: Real-time Prediction of Chlorophyll-a Time Series based on Continuous Observation Data, 2011 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2011.10.18.
128. Haruka Iseri, Kazuaki Hiramatsu and Masayoshi Harada: Simulation of Nutrient Load Runoff Based on Detailed Watershed Data for a Semi-urban Watershed, the 2011 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2011.9.7.
129. Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: Optimization of Configuration of Nori Aquafarming Grounds in the Ariake Sea Coastal Waters using Index of Nitrogen Assimilation in Nori Leaf Bodies, the 2011 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2011.9.8.
130. Shinya Masuda, Shinji Fukuda, Kazuaki Hiramatsu and Masayoshi Harada: Comparison between multivariate and univariate models in habitat preference evaluation of Japanese medaka (Oryzias latipes) using a HSI model, the 2011 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2011.9.7.
131. Maho Kiyota, Shinji Fukuda, Shinya Masuda, Shunichiro Ishibashi, Kazuaki Hiramatsu and Masayoshi Harada: Assessing diurnal changes of habitat preference of Japanese medaka (Oryzias latipes) based on a laboratory experiment, the 2011 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2011.9.7.
132. Tsuyoshi Inoue, Junko Shibamoto, Masafumi Aoki, Thai Khanh Phong, Katsunori Yoshino and Kazuaki Hiramatsu: Herbicide Runoff from a Paddy block in Relation to Irrigation and Drainage Water Management, The 62th Annual Conference of Japan Water Works Association, 2011.5.19 .
133. Do Thuy Nguyen, Masayoshi Harada and Kazuaki Hiramatsu: Application of Simple Genetic Algorithm for calibrating an Aquatic Ecosystem Model, The 3rd IWA Asia Pacific Young Water Professionals Conference, Achieving Sustainable Development in the New Era, Singapore, 2010.11.23.
134. Masayoshi Harada, Kazuaki Hiramatsu, Do Thuy Nguyen and Akifumi Douma: Numerical Simulation of Water Quality in a Eutrophic Reservoir using an Ecosystem Model considering Species Composition of Algae, Joint Symposium on Integrated Water and Soil Management between Water Resources University, Vietnam and Kyushu University, Japan, Hanoi, Vietnam, 2010.11.22.
135. Le Van Chinh, Kazuaki Hiramatsu, Masayoshi Harada and Makito Mori: Mathematical Modeling of Surface Water Quantity and Quality for Optimal Management of Water Resources in a Flat Low-lying Agricultural Area, Hydrology Conference 2010, The Changing Physical and Social Environment: Hydrologic Impacts and Feedbacks, San Diego, CA, USA, 2010.10.12.
136. Shinya Masuda, Shinji Fukuda, Kazuaki Hiramatsu and Masayoshi Harada: Habitat suitability analysis for Japanese medaka (Oryzias latipes) using presence-absence data with four different categorization approaches, The 8th International Symposium on Ecohydraulics 2010, Bridging between Ecology and Hydraulics and Leading the Society's New Need - Living with Nature, Seoul, Korea, 2010.9.13
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137. Shinya Masuda, Shinji Fukuda, Kazuaki Hiramatsu and Masayoshi Harada: Assessing transferability of HSI model in habitat prediction of Japanese medaka (Oryzias latipes), 2010 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2010.10.19.
138. Haruka Iseri, Kazuaki Hiramatsu and Masayoshi Harada: Simulation of Nitrogen and Phosphorus Load Runoff by a Distributed Water Quality Model for Zuibaiji River Basin, 2010 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2010.10.19.
139. Yuichiro Yoshimura, Masayoshi Harada, Kazuaki Hiramatsu and Atsushi Marui: Quantification of Water Environment in a Regulation Pond under Progressing Organic Pollution due to Humic Acid, 2010 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2010.10.19.
140. Toshinori Tabata, Kazuaki Hiramatsu and Masayoshi Harada: Numerical Simulations of Convective Dispersion in the Ariake Sea Considering the Optimum Arragement of Aquafarming Grounds, 2010 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2010.10.19.
141. Akifumi Douma, Masayoshi Harada, Kazuaki Hiramatsu and Atsushi Marui: Dynamic Analysis of Chlorophyll-a and Nutrients in Agricultural Reservoirs by using an Ecosystem Model Based on Species Composition of Algae, 2010 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2010.10.19.
142. Do Thuy Nguyen, Masayoshi Harada and Kazuaki Hiramatsu: Optimization of an Ecosystem Model Simulating Water Quality in a Eutrophic Pond using Simple Genetic Algorithm, The 2010 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Kobe, Japan, 2010.9.1.
143. Masayoshi Harada, Akiko Matsumoto, Kazuaki Hiramatsu and Atsushi Marui: Extraction of Water Environmental Characteristics in a Eutrophic Reservoir by Self-Organizing Maps, The 2010 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Kobe, Japan, 2010.9.1.
144. Haruka Iseri, Kazuaki Hiramatsu and Masayoshi Harada: Pollutant Load Analysis by a Distributed Runoff Model Considering Detailed Watershed Data, The 2010 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Kobe, Japan, 2010.9.1.
145. Kazuaki Hiramatsu: 2010 Revision of JABEE Accreditation Criteria and Duty of Notification about Modification of Accredited Program, The 2010 Annual Conference of the Japanese Society of Irrigation, Drainage and Rural Engineering, Kobe, Japan, 2010.9.1.
146. Thai Khanh Phong,Hirozumi Watanabe and Kazuaki Hiramatsu: Uncertainties in modelling pesticide losses from rice fields to an adjacent drainage canal, The 12th IUPAC International Congress of Pesticide Chemistry, Melbourne, Australia, 2010.7.5.
147. Katsunori Yoshino, Thai Khanh Phong,Kazuaki Hiramatsu,Masayoshi Harada,Kei Kondo, Hirozumi Watanabe and Tsuyoshi Inoue: Water management and water balance estimation in a paddy block: A case study in Kurume City, Fukuoka, The 6th Japan-Korea International Joint Symposium, Fukuoka, 2009.11.12.
148. Do Thuy Nguyen, Masayoshi Harada and Kazuaki Hiramatsu: Numerical Simulation of Water Quality in an Agricultural Pond using a One-box Ecosystem Model, The 6th Japan-Korea International Joint Symposium, Fukuoka, 2009.11.12.
149.
Katsunori Yoshino, Thai Khanh Phong,Kazuaki Hiramatsu,Masayoshi Harada,Kei Kondo, Hirozumi Watanabe and Tsuyoshi Inoue: Relationship between Water Management and Pesticide Runoff from a Paddy Block in Kurume City, Fukuoka, Japan, 2009 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2009.10.27.
150. Do Thuy Nguyen, Masayoshi Harada and Kazuaki Hiramatsu: Dynamic Analysis of Chlorophyll-a Concentration in a Eutrophic Pond using an Ecosystem Model, 2009 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2009.10.27.
151. Takafumi Tominaga, Masayoshi Harada, Kazuaki Hiramatsu and Atsushi Marui: Time Series Analysis of Chlorophyll-a Concentration considering Algae Class in a Eutrophic Water Body using Discrete Wavelet Transform, 2009 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2009.10.27.
152. Haruka Iseri, Kazuaki Hiramatsu and Masayoshi Harada: Scenario Analyses in Chikugo River Basin with a GIS-based Distributed Runoff Model, 2009 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2009.10.27.
153. Shinya Masuda, Shinji Fukuda, Kazuaki Hiramatsu and Masayoshi Harada: Comparison of Categorization Approaches of HSI Models in Habitat Evaluation for Japanese Medaka (Oryzias latipes), 2009 Annual Conference of Kyushu Branch of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2009.10.27.
154. Thai Khanh Phong, Katsunori Yoshino, Kazuaki Hiramatsu, Masayoshi Harada, Kei Kondo, Julien Boulange and Hirozumi Watanabe: Water Management: Key Issue in Preventing Pesticide Pollution from Paddy Fields, PAWEES 2009 International Conference on Promising Practices for the Development of Sustainable Paddy Fields, 2009.10.7.
155. Haruka Iseri, Kazuaki Hiramatsu, Masayoshi Harada : Development of GIS Based Distributed Runoff Model for Chikugo River Basin, Annual Conference of JSIDRE, 2009.8.
156. Masayoshi Harada, Tatsuya Yamamoto, Kazuaki Hiramatsu and Atsushi Marui : Three-dimensional Analysis of Dissolved Oxygen in Eutrophic Closed Water under Scarce Underwater Light Environment, Annual Conference of JSIDRE, 2009.8.4.4.
157. Le Van Chinh, Kazuaki Hiramatsu, Masayoshi Harada and Makito Mori: Numerical Modeling of Nitrogen and Phosphorus in a Flat Low-Lying Paddy Cultivated Area, JSPS International Seminar 2008 "Hybrid Rice and Transformation of Farming Systems", 2008.11.
158. Haruka Iseri, Masayoshi Harada, Kazuaki Hiramatsu, Makito Mori and Atsusi Marui: Numerical Analysis of Nutrients Dynamics in Eutrophic Reservoirs using an Ecosystem Model, Annual Conference of JSIDRE Kyushu Branch, 2008.10.
159. Akiko Matsumoto, Masayoshi Harada, Kazuaki Hiramatsu, Makito Mori and Atsusi Marui: Evaluations of Aquatic Environment Reservoirs Based on the Species Composition and the Seasonal Change in Plankton, Annual Conference of JSIDRE Kyushu Branch, 2008.10.
160. Le Van Chinh, Kazuaki Hiramatsu, Masayoshi Harada and Makito Mori: Nitrogen and phosphorus runoff modeling in a flat low-lying paddy cultivated area, Annual Conference of JSIDRE, 2008.8.
161. Koji SAI, Masayoshi HARADA, Kazuaki HIRAMATSU and Makito MORI: Analytical Study on Water Environment in Lake Togo using an Eco-hydrodynamic Model, Annual Conference of JSIDRE, 2008.8.
162. Masayoshi HARADA, Kazuaki HIRAMATSU and Takashi SAITOh: Dynamic Characteristics of Dissolved Oxygen in a Eutrophic Water Body under Scarce Underwater Light Environment, Annual Conference of JSIDRE, 2008.8.
163. Kazuaki HIRAMATSU, Masayoshi HARADA, Mitsunobu IWABUCHI, Shigeru IKEURA, Katsutosi KUNO, Toshio SYUTO and Yukihumi YOSHIDA: Numerical Simulation of Tidal Current in and around Nori Aquafarming Grounds in the Ariake Sea Coastal Waters, Annual Conference of JSIDRE, 2008.8.
164. Makito Mori, Kazuaki Hiramatsu and Masayoshi Harada: Relationship between GPS-derived Precipitable Water Vapor and Surface Vapor Pressure under Low-humidity Conditions, International Symposium on Agricultural Meteorology ISAM2008.
165. Makito Mori, Kazuaki Hiramatsu, Masayoshi Harada and Le Van Chinh: Estimation of Potential Evapotranspiration in a Flat, Low-Lying Area Using Routine Meteorological Data, International Symposium on Agricultural Meteorology ISAM2008.
166. Le Van CHINH, Kazuaki HIRAMATSU, Masayoshi HARADA and Makito MORI: Mathematical Simulation for Optimal Gate Operation of a Main Drainage Canal in a Flat Low-lying Agricultural Area, Joint Workshop between Faculty of Land and Environment, Hanoi Agricultural University and Faculty of Agriculture, Kyushu University "Recent Development in the Research of Soil and Water", 2007.9.
167. Makito MORI, Kazuaki HIRAMATSU, Masayoshi HARADA, Koichi URANO, Shun-ichi ONIMARU and Hour IX: Development of a GIS-based Hydro-environmental Runoff Model and its Application to a Semi-urbanized Basin Area, Joint Workshop between Faculty of Land and Environment, Hanoi Agricultural University and Faculty of Agriculture, Kyushu University "Recent Development in the Research of Soil and Water", 2007.9.
168. Masayoshi HARADA, Kazuaki HIRAMATSU, Makito MORI, Hour IX and Tatsuya YAMAMOTO: Dynamic Analysis of Water Quality in an Agricultural Pond Using a Primary Ecosystem Model, Joint Workshop between Faculty of Land and Environment, Hanoi Agricultural University and Faculty of Agriculture, Kyushu University "Recent Development in the Research of Soil and Water", 2007.9.
169. Ichiro NAKASHIMA, Naoki MATSUO, Masayoshi HARADA, Kazuaki HIRAMATSU, Makito MORI and Toshihiro MOCHIDUKI: Estimation of Runoff Characteristics of Rice Herbicides from a Paddy Plot using the Paddy Model, Annual Conference of JSIDRE Kyushu Branch, 2007.10.
170. Tatsuya YAMAMOTO, Masayoshi HARADA, Kazuaki HIRAMATSU and Makito MORI: Scenario Analyses of Water Quality Environment in an Agricultural Pond using a Primary Ecosystem Model, Japan-Germany International Cooperative Project on Education and Research "Multi-Functionality and Sustainability of Land Use in SE. and E. Asia, 2007.9.
171. Hour IX, Makito MORI, Kazuaki HIRAMATSU and Masayoshi HARADA: Surface Runoff Prediction in an Urbanizing Agricultural Watershed using a GIS-based Watershed Management Model, Japan-Germany International Cooperative Project on Education and Research "Multi-Functionality and Sustainability of Land Use in SE. and E. Asia, 2007.9.
172. Koji SAI, Masayoshi HARADA, Isao YOSHIDA, Kazuaki HIRAMATSU and Makito MORI: Numerical Estimation of Chlorophyll-a Concentration in an Europhic Brackish Lake using Artificial Neural Network Models, Japan-Germany International Cooperative Project on Education and Research "Multi-Functionality and Sustainability of Land Use in SE. and E. Asia, 2007.9.
173. Le Van CHINH, Kazuaki HIRAMATSU, Masayoshi HARADA and Makito MORI: Flood Inundation Analysis and Optimal Gate Operation of a Main Drainage Canal in a Flat Low-lying Agricultural Area, Japan-Germany International Cooperative Project on Education and Research "Multi-Functionality and Sustainability of Land Use in SE. and E. Asia, 2007.9.
174. Hour IX, Kazuaki HIRAMATSU, Masayoshi HARADA and Makito MORI: Ecosystem Modeling and Scenario Analysis of Water Quality Dynamics in an Agricultural Pond, Annual Conference of JSIDRE, 2007.8.
175. Le Van CHINH, Kazuaki HIRAMATSU, Masayoshi HARADA and Makito MORI: Mathematical simulation for optimal gate operation of a main drainage canal in a flat low-lying agricultural area, Annual Conference of JSIDRE, 2007.8.
176. Koji SAI, Masayoshi HARADA, Kazuaki HIRAMATSU and Makito MORI: Development of 3-dimensional Eco-hydrodynamic Model for an Eutrophic Lake, Annual Conference of JSIDRE, 2007.8.
177. Shinji FUKUDA, Shuji OKUSHIMA and Kazuaki HIRAMATSU: Approaches in habitat preference evaluation for Japanese medaka (Oryzias latipes), Annual Conference of JSIDRE, 2007.8.
178. Koji SAI, Masayoshi HARADA, Isao YOSHIDA, Kazuaki HIRAMATSU and Makito MORI: Feasibility of Dynamic Prediction of Chlorophyll a in Eutrophic Lake using an Artificial Neural Network Model, The 4th IWA Specialist Conference on Efficient Use and Management of Urban Water Supply, 2007.5.
179. Makito MORI, Kazuaki HIRAMATSU and Masayoshi HARADA: Prediction of Daily Heavy Precipitation in a Lowland Area using GPS and Surface Weather Data, The 4th IWA Specialist Conference on Efficient Use and Management of Urban Water Supply, 2007.5.
180. Shinji FUKUDA and Kazuaki HIRAMATSU: Prediction accuracy of habitat preference intensity models incorporated with artificial intelligence techniques, Fukuoka 2006 of Ecology and Civil Engineering Society, 2006.12.
181. Makito MORI, Kazuaki HIRAMATSU and Masayoshi HARADA: Prediction of Heavy Precipitation Based on Relation Between Surface Temperature and GPS-derived Precipitable Water Vapor, The 19th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2006.11.
182. Shinji FUKUDA and Kazuaki HIRAMATSU: The use of Akaike information criterion for selecting optimal habitat preference model of Japanese medaka (Oryzias latipes), The 19th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2006.11.
183. Koji SAI, Masayoshi HARADA, Isao YOSHIDA, Kazuaki HIRAMATSU and Makito MORI: Short-term Prediction of Dissolved Oxygen of Lake Koyama, Tottori Prefecture, by Artificial Neural Network Model and Improvement of Prediction Accuracy by Wavelet Analysis, The 19th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2006.11.
184. Lei Van CHINH, Kazuaki HIRAMATSU, Masayoshi HARADA and Makito MORI: Optimal gate operation of a main drainage canal in a flat low-lying agricultural area using a tank model incorporated with a genetic algorithm, JSPS SEMINAR “Science of hybrid rice: breeding, cropping, patterns and the environment”, 2006.11.
185. Hour IX, Kazuaki HIRAMATSU, Masayoshi HARADA and Makito MORI: Water quality conservation in an agricultural pond using an ecosystem model and scenario analysis, JSPS SEMINAR “Science of hybrid rice: breeding, cropping, patterns and the environment”, 2006.11.
186. Koji SAI, Masayoshi HARADA, Isao YOSHIDA, Kazuaki HIRAMATSU and Makito MORI: Short-term Prediction of Dissolved Oxygen of Lake Koyama, Tottori Prefecture, by Artificial Neural Network Model and Improvement of Prediction Accuracy by Wavelet Analysis, The 19th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2006.11.
187. Shinji FUKUDA and Kazuaki HIRAMATSU: The use of Akaike information criterion for selecting optimal habitat preference model of Japanese medaka (Oryzias latipes), The 19th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2006.11.
188. Makito MORI, Kazuaki HIRAMATSU and Masayoshi HARADA: Prediction of Heavy Precipitation Based on Relation Between Surface Temperature and GPS-derived Precipitable Water Vapor, The 19th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2006.11.
189. Kyouhei SAKAKI, Isao YOSHIDA, Masayoshi HARADA, Kazuaki HIRAMATSU and Takafumi NIWA: Evaluation of Water Environment in Lake Koyama from Water Quality Dynamics and Seasonal Variation of Zooplankton and Phytoplankton, Annual Conference of JSIDRE Chu-Shikoku Branch, 2006.10.
190. Shinji FUKUDA and Kazuaki HIRAMATSU: Quantification of fish habitat preference of Japanese medaka (Oryzias latipes) using Resource Selection Functions, Annual Conference of JSIDRE Kyushu Branch, 2006.10.
191. Takashi SAITO, Masayoshi HARADA, Kazuaki HIRAMATSU and Makito MORI: Scenario Analyses for Nitrogen Reduction in an Agricultural Pond using One-box Ecosystem Model, Annual Conference of JSIDRE Kyushu Branch, 2006.10.
192. Koji SAI, Masayoshi HARADA, Kazuaki HIRAMATSU, Makito MORI and Isao YOSHIDA: Evaluation of Water Environment in Lake Togo, Tottori Prefecture, from Seasonal Variation and Spatial Distribution of Water Quality, Annual Conference of JSIDRE Kyushu Branch, 2006.10.
193. Makito MORI, Kazuaki HIRAMATSU and Masayoshi HARADA: Estimation of Monthly averaged Relative Humidity using GPS-derived Precipitable water Vapor, Annual Conference of JSIDRE Kyushu Branch, 2006.10.
194. Masayoshi HARADA, Kazuaki HIRAMATSU, Makito MORI, Koji SAI, Masako MISHIMA and Isao YOSHIDA: Numerical Simulation on Formation and Destruction Processes of Density Stratification in Lake Koyama using One-dimensional Vertical-diffusion Model, Annual Conference of JSIDRE Kyushu Branch, 2006.10.
195. Shinji FUKUDA, Kazuaki HIRAMATSU, Makito MORI, Masayoshi HARADA and Shiomi SHIKASHO: Model selection toward the quantification of fish habitat preference of Japanese medaka (Oryzias latipes), International Conference on Ecological Modelling 2006, 2006.8.
196. Le Van CHINH, Kazuaki HIRAMATSU, Masayoshi HARADA and Makito MORI: Optimal gate operation of main drainage canal in a flat low-lying area using tank model incorporated with genetic algorithm, Annual Conference of JSIDRE, 2006.8.
197. Kyohei SAKAKI, Masayoshi HARADA, Isao YOSHIDA and Kazuaki HIRAMATSU: Numerical Simulation of Water Motion and Salinity Diffusion in Lake Togo by Two-dimensional One-layer Model, Annual Conference of JSIDRE, 2007.8.
198. Koji SAI, Masayoshi HARADA, Isao YOSHIDA and Kazuaki HIRAMATSU: Prediction of Chlorophyll a Dynamics in Eutrophic Lake by Artificial Neural Network Model, Annual Conference of JSIDRE, 2006.8.
199. Masayoshi HARADA, Mayumi FUKUDA, Isao YOSHIDA and Kazuaki HIRAMATSU: Short-term Prediction of Dissolved Oxygen of Lake Koyama by Local Approximation Method incorporated with Wavelet Transform, Annual Conference of JSIDRE, 2006.8.
200. Masao KAMIYA, Kazuaki HIRAMATSU, Masayoshi HARADA, Makito MORI: A three-dimensional sigma-coordinate ocean model with a wetting and drying scheme and its application to Isahaya Bay, Annual Conference of JSIDRE, 2006.8.
201. Makito MORI, Takamichi MIMORI and Kazuaki HIRAMATSU: Evaluation of Regional-Scale Hydrological Environment using GPS-derived Precipitable water Vapor, Annual Conference of JSIDRE, 2006.8.
202. Kazuaki HIRAMATSU: Learning-and-educational Objects and Curriculum Design for Engineering Design Education, Annual Conference of JSIDRE, 2006.8.
203. Kazuaki HIRAMATSU, Kiyoshi KUROSAWA, Makito MORI and Shiomi SHIKASHO: Flood Inundation Analysis in a Flat Low-lying Paddy-cultivated Area of the Red River Delta, Viet Nam, Joint Symposium between Hanoi Agricultural University and Kyushu University, 2005.12.
204. Katsuichirou ABE, Shinji FUKUDA, Kazuaki HIRAMATSU, Makito MORI and Shiomi SHIKASHO: Quantification of Preference Intensity of Japanese Medaka for Environmental Factors in Agricultural Canal, Annual Conference of JSIDRE Kyushu Branch, 2005.10.
205. Yuko OKADA, Kazuaki HIRAMATSU, Shiomi SHIKASHO and Makito MOR: Rainfall Runoff Modeling in a Small Mountainous Basin Using TOPMODEL, Annual Conference of JSIDRE Kyushu Branch, 2005.10.
206. Koichi URANO, Shiomi SHIKASHO, Kazuaki HIRAMATSU and Makito MORI: Applicability of the Long- and Short-Term Runoff Model in a Small Mountainous Basin, Annual Conference of JSIDRE Kyushu Branch, 2005.10.
207. Makito MORI, Takamichi MIMORI, Shiomi SHIKASHO and Kazuaki HIRAMATSU: Estimation of Potential Evaporation in Kyushu Area using GPS Precipitable Water Vapor, Annual Conference of JSIDRE Kyushu Branch, 2005.10.
208. Shinji FUKUDA, Kazuaki HIRAMATSU, Makito MORI and Shiomi SHIKASHO: Numerical quantification of vegetation cover influencing spatial distribution of Japanese Medaka (Oryzias latipes) in an agricultural canal, Annual Conference of Ecology and Civil Engineering, 2005.9.
209. Shinji Fukuda, Kazuaki Hiramatsu, Shiomi Shikasho and Makito Mori: Qantification of habitat preference for Japanese Medaka in agricultural canal, Annual Conference of JSIDRE, 2005.8.
210. Shinji Fukuda, Kazuaki Hiramatsu, Shiomi Shikasho and Makito Mori: Fuzzy Rule-based Modeling of Preference Intensity of Japanese Medaka Fish for Environmental Factors in Irrigation Canal, Annual Conference of JSIDRE Kyushu Branch, 2004.10.
211. Hironobu Tanaka,Kazuaki Hiramatsu,Shiomi Shikasho and Makito Mori: Measurement Parameters of Particle Image Velocimetry (PIV) for an Open Channel Backward-Facing Step Flow, Annual Conference of JSIDRE Kyushu Branch, 2004.10.
212. Hideaki Tasai,Kazuaki Hiramatsu, Makito Mori and Shiomi Shikasho: Long- and Short-Term Runoff Analysis in a Small Mountainous Basin Using TOPMODEL, Annual Conference of JSIDRE Kyushu Branch, 2004.10.
213. Kazuaki Hiramatsu, Shiomi Shikasho, Kiyoshi Kurosawa and Makito Mori: Drainage and Inundation Analysis in Phu Lam Commune, a Flat Low-lying Agricultural Area of the Red River Delta, Viet Nam, Annual Conference of JSIDRE, 2004.9.
214. Shinji Fukuda, Kazuaki Hiramatsu and Shiomi Shikasho: Prediction Accuracy of Fuzzy Preference Intensity Model for Japanese Medaka Fish, Annual Conference of JSIDRE, 2004.9.
215. Makito Mori, Shiomi Shikasho and Kazuaki Hiramatsu: Hydrological Cycle in a Small Mountainous Basin – Seasonal Variation of Runoff Rate and Evapotranspiration, Annual Conference of JSIDRE, 2004.9.
216. Kazuaki Hiramatsu, Shiomi Shikasho and Shinji Fukuda: Mathematical Modeling of Preference Intensity of Japanese Medaka Fish for Instream Water Environment using Fuzzy Reasoning, The 2004 ASAE/CSAE Annual International Meeting, 2004.8.
217. Kazuaki Hiramatsu, Shinji Fukuda and Shiomi Shikasho: Fuzzy Rule-based Quantification of Preference Intensity of Japanese Medaka for Instream Water Environment, The 16th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2003.10.
218. Yuko Okada, Kazuaki Hiramatsu and Shiomi Shikasho: Relationship Between Basin Storage and Discharge in a Small Mountainous Basin, Annual Conference of JSIDRE Kyushu Branch, 2003.10.
219. Takamichi Mimori, Shiomi Shikasho, Kazuaki Hiramatsu and Osamu Kato: Experimental Study on Critical Velocity for the Erosion of the Ariake Bottom Mud using a Annular Flume, Annual Conference of JSIDRE Kyushu Branch, 2003.10.
220. Kazuaki Hiramatsu and Shiomi Shikasho: Short-term Prediction of Water-Stage Time Series in a Tidal River using a State Space Predictor, The 2nd International Workshop on Sustainable Development of Tidal Areas, 2003.9.
221. Shinji Fukuda, Kazuaki Hiramatsu and Shiomi Shikasho: Mathematical Modeling of Preference Intensity of Japanese Medaka for Instream Water Environment using Fuzzy Inference, Annual Conference of JSIDRE, 2003.7.
222. Kazuaki Hiramatsu, Kei Nakayama, Yuji Oshima, Shiomi Shikasho and Tsuneo Honjo: An Approach to Fish-based Miomonitoring Using Behavior Analysis of Japanese Medaka Fish, The 15th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2002.10.
223. Joko Sujono, Shiomi Shikasho and Kazuaki Hiramatsu: Flood Estimation Methods for Tropical River Basins, Annual Symposium of JSIDRE Kyushu Branch, 2002.10.
224. Kazuaki Hiramatsu, Kei Nakayama, Yuji Oshima, Shiomi Shikasho and Tsuneo Honjo: Application of Fractal Dimension Analysis and Wavele Analysis to Biomonitoring for Water Quality, Annual Conference of JSIDRE Kyushu Branch, 2002.10.
225. Toru Fukunishi, Kazuaki Hiramatsu, Suguru Inoue, Kazutoshi Saeki, Shin-Ichirou Wada and Shiomi Shikasho: Inverse Estimation of Butyltin Compounds Contamination in the Ariake Sea, Annual Conference of JSIDRE Kyushu Branch, 2002.10.
226. Daisuke Nojiri, Joko Sujono, Shiomi Shikasho and Kazuaki Hiramatsu: Identification and Synthesis of Storage Function Parameters, Annual Conference of JSIDRE Kyushu Branch, 2002.10.
227. Joko Sujono, Shiomi Shikasho and Kazuaki Hiramatsu: Evaluation of the Storage Function Model Parameters Using Fuzzy Linear Regression Approach,The 13th Congress of the Asia and Pacific Division of the International Association for Hydraulic Engineering and Research, 2002.8.
228. Kazuaki Hiramatsu and Shiomi Shikasho: Spacial Distribution of Japanese Medaka Based on Preference Intensity for Environmental Factors, Annual Conference of JSIDRE, 2002.8.
229. Kazuaki Hiramatsu and Shiomi Shikasho: Experimental Study on the Fish Preference for Hydraulic Environments,The 2002 ASAE Annual International Meeting / CIGR XVth World Congress, 2002.7.
230. Joko Sujono, Shiomi Shikasho and Kazuaki Hiramatsu: Parameter Estimation of the Storage Function Model Using Fuzzy Linear Regression Approach,The XIV International Conference on Computational Methods in Water Resources, 2002.6.
231. Kei Nakayama, Yuji Oshima, Kazuaki Hiramatsu, Issei Nakamura, Nobuyoshi Imada and Tsuneo Honjo: Abnormal Behavior in Fish Schooling due to Environmental Contaminants, Annual Conference of JSWE, 2002.3.
232. Kazuaki Hiramatsu and Shiomi Shikasho: Experimental Study on Preference Intensity of Japanese Medaka for Hydraulic Environments, Annual Conference of JSIDRE Research Division for Applied Hydraulics, 2001.12.
233. Kazuaki Hiramatsu and Shiomi Shikasho: An Approarch to Estimation Of Environmental Preference of Fish from Chaos Engineering, The 14th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2001.10.
234. Kazuaki Hiramatsu and Shiomi Shikasho: Assessment of the Degree of Fish Strain in Water Environment using Fractal Analysis, Annual Conference of JSIDRE Kyshu Branch, 2001.10.
235. Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: Two-dimensional Numerical Modeling of Cohesive Sediment Transportation for Coastal Waters in the Ariake Sea, Japan, The 1st Asian Regional Conference of ICID, 2001.9.
236. Kazuaki Hiramatsu and Shiomi Shikasho: Experimental Study on Preference Curve of Japanese Medaka for Hydraulic Environments, Annual Conference of JSIDRE, 2001.7.
237. Joko Sujono, Shiomi Shikasho, Ken Mori and Kazuaki Hiramatsu: Design Unit Hydrograph Procedure for Eastern New South Wales, Australia,The 12th Congress of the Asia and Pacific Division ofthe International Association for Hydraulic Engineering and Research, 2000.11.
238. Tomohiro Makihira, Ken Mori, Shiomi Shikasho and Kazuaki Hiramatsu: Hydraulic Characteristics in Artificial Fish-habitat Blocks, Annual Conference of JSIDRE Research Branch for Applied Hydraulics, 2000.12.
239. Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: Simulation and Analysis of a Fish School in a Water Tank using a Behavioral Pattern Model,The 12th Congress of the Asia and Pacific Division ofthe International Association for Hydraulic Engineering and Research, 2000.11.
240. Kazuaki Hiramatsu, Yuji Oshima, Shiomi Shikasho, Ken Mori and Suguru Inoue: Muliple-compartment Modeling of Butyltin Compounds Contamination in the Ariake Sea, The 13th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 2000.10.
241. Kazuaki Hiramatsu, Yuji Oshima, Shiomi Shikasho, Ken Mori and Suguru Inoue: Numerical Modeling of the Environmentl Behavior and Fate of Butyltin Compaunds in a Semi-closed Bay, Annual Conference of JSIDRE Kyushu Branch, 2000.8.
242. Takaya Kamisaki, Shiomi Shikasho, Kazuaki Hiramatsu and Ken Mori: Flood Mitigation Function of Flat Low-lying Paddy-Creak Area in Chiyoda District, Saga Prefecture, Annual Conference of JSIDRE Kyushu Branch, 2000.8.
243. Ken Mori, Shiomi Shikasho and Kazuaki Hiramatsu: Flow in a U-shaped Burrow, Annual Conference of JSIDRE Kyushu Branch, 2000.8.
244. Akira Eto, Shouhei Ikeda, Shiomi Shikasho, Ken Mori and Kazuaki Hiramatsu: Shape of Density Current Interface near a Bottom Structure, Annual Conference of JSIDRE Kyushu Branch, 2000.8.
245. Tomijiro Kubota, Shiomi Shikasho, Ken Mori and Kazuaki Hiramatsu: One-dimensional Modeling of Suspended Sediment Transportation in Closed Water Bodies in Reclaimed Area, Annual Conference of JSIDRE, 2000.8.
246. KazuakiHiramatsu, Shiomi Shikasho and Ken Mori: Mathematical Modeling of Fish School Behavior to Hydraulic Environment, Annual Conference of JSIDRE, 2000.8.
247. Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: Numerical Modeling of Fish School Behavior in Hydraulic Environment, Annual Conference of JSIDRE Research Division for Applied Hydraulics, 1999.12.
248. Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: Numerical Simulations of Fish School by Newtonian Dynamics Model, Annual Copnference of JSIDRE Kyushu Branch, 1999.11.
249. Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: The Use of a State Space Predictor with Local Approximation for Short-Term Predictions of River Water-stages,The 8th International Conference on Urban Storm Drainage, 1999.8.
250. Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: Flood Mitigation Function of Flat Low-lying Paddy Area, Annual Conference of JSIDRE, 1999.8.
251. Masayoshi Harada, Kazuaki Hiramatsu, Shiomi Shikasho: Retardation of Settling Velocity in Grid-genarated Turbulent flows, Annual Conference of JSIDRE, 1999.8.
252. Ken Mori, Shiomi Shikasho and Kazuaki HIramatsu: Mixture Characteristics of Density Current Interface Driven by Water Surface Heating and Cooling, Annual Conference of JSIDRE Research Division for Applied Hydraulics, 1998.12.
253. Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: Short-Term Prediction of Water-Stages in a Tidal River using Feedback Artificial Neurtal network Model, The 11th Symposium of JSIDRE Research Division for Hydrology and Water Environment, 1998.10.
254. Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: Flood Mitigation Function of Flat Low-lying Agricultural Area, Annula Conference of JSIDRE Kyushu Branch, 1998.10.
255. Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: The Use of Genetic Algorithm and Artificial Neural Network for the Short-Term Prediction of Water-Stages in a Tidal River,The 11th Congress of Asia and Pacific Division of the International Association for Hydraulic Research, 1998.9.
256. Masayoshi Harada, Kazuaki Hiramatsu, Shiomi Shikasho: Wavelet Analysis of Dynamic Response of Floc in Turbulent Shear Flows -Settling Velocity of Floc in Turbulent Flows(1)-, Annual Conference of JSIDRE, 1998.7.
257. Masayoshi Harada, Kazuaki Hiramatsu, Shiomi Shikasho and Ken Mori: Measuring Method of Suspension Concentration in Open Channel Flow using Image Processing,The 11th Congress of Asia and Pacific Division of the International Association for Hydraulic Research, 1998.9.
258. Kazuaki Hiramatsu, Shiomi Shikasho, Ken Mori and Masayoshi Harada: Retardation of Settling Velocity in Sinusoidally Oscillating Flows -Settling Velocity of Floc in Turbulent Flows(1)-, Annual Conference of JSIDRE, 1998.7.