|Yukihiro Shimatani||Last modified date：2019.07.01|
Professor / Laboratory of Hydrosphere Sutainability Engineering / Faculty of Engineering
|Yukihiro Shimatani||Last modified date：2019.07.01|
|1.||Naoya Furuta, Yukihiro Shimatani, Integrating ecological perspectives into engineering practices – Perspectives and lessons from Japan, Inter National Journal of Disaster Risk Reduction, 32, 87-94, 2018.12.|
|2.||HYDRAULIC MODEL EXPERIMENTS ON RIVER BANK PROTECTION USING MASONRY GROIN IN URBAN HIGH GRADIENT RIVER WITH NARROW SECTIO.|
|3.||Rei Itsukushima, Kai Morita and Yukihiro Shimatani, The Use of Molluscan Fauna as Model Taxon for the Ecological Classification of River Estuaries, Water 2017, 2017.06.|
|4.||Tatsuro Sato, Jun’ichiro Ide, M. Alhaqurahman Isa, Faisal Rahadian, Tokihiko Fujimoto, Yukihiro Shimatani, A Challenge for Sustainable Electrification, Respecting the Local Tradition in Ciptagelar Village, West Java, Indonesia: Complementary Approach with a Private Company, Energy Procedia, 2017.06.|
|5.||Rei Itsukushima, Kai Morita, Yukihiro Shimatani, The use of molluscan fauna as model Taxon for the Ecological classification of river estuaries, Water (Switzerland), 10.3390/w9050356, 9, 5, 2017.05, River estuaries are important aquatic environments characterized by large environmental gradients in their water quality, riverbed material, and microtopography in the longitudinal and transverse directions. The geography or habitats in river estuaries differ depending on the energy from the tide, waves, and river; therefore, the biota inhabiting river estuaries vary depending on the river estuary type. In view of this, for effective conservation in river estuaries, there is a need for information about potential habitats and biota based on objective data about the river estuary type. The objective of this study thus was to classify river estuaries by their molluscan fauna and physical indicators to reveal the relationship between molluscan fauna and the physical environment. The classification results using physical indicators indicated three types of river estuaries (wave energy-dominated group, tide energy-dominated group, and low tide and wave energy group). This classification result was similar to the classification of molluscan fauna. Therefore, it was suggested that molluscan fauna is extremely useful as a variable representing the river estuary environment. From the comparison between molluscan fauna and the physical environment, some rivers were not classified into the same group in the classification of molluscan fauna, despite them having similar physical environments. Some of these rivers with a molluscan fauna that diverged from expectations had undergone channel modification, which is expected to have caused a shift in this fauna group. These results suggest that this approach could be used to identify rivers that have been degraded by human activities..|
|6.||Tatsuro Sato, Junichiro Ide, M. Alhaqurahman Isa, Faisal Rahadian, Tokihiko Fujimoto, Yukihiro Shimatani, A Challenge for Sustainable Electrification, Respecting the Local Tradition in Ciptagelar Village, West Java, Indonesia
Complementary Approach with a Private Company, Energy Procedia, 10.1016/j.egypro.2017.11.044, 141, 368-372, 2017.01, Ensuring access to affordable, reliable, sustainable modern energy is a key challenge in reducing poverty in developing countries. Off-grid rural electrification based on decentralized renewable energy has been recognized as an effective way to increase access to energy in remote areas. However, there is some doubt about its long-term sustainability. Previous studies have indicated that once renewable energy generation facilities are installed, the responsibility for operation and maintenance is often handed over to the local community, and, eventually, the project fails because of a lack of maintenance budget. This paper discusses issues related to the sustainability of MHP-based rural electrification as a case study in a remote village in West Java, Indonesia, that is deeply steeped local traditions. A complementary approach between the community and a private company was introduced to improve the economic sustainability of MHPPs while simultaneously conserving local traditions and livelihoods..
|7.||Naoya Furuta, Yukihiro Shimatani, Integrating ecological perspectives into engineering practices - Perspectives and lessons from Japan, International Journal of Disaster Risk Reduction, 10.1016/j.ijdrr.2017.12.003, 2017.01, This article focuses on how ecosystem-based approaches could be mainstreamed in recovery and reconstruction after large scale, rare and infrequent coastal hazards. In doing so, this study reviews historical practices of disaster management in rivers and coasts as well as reconstruction process after the Great East Japan Earthquake (GEJE). It reveals how ecosystem approaches are integrated in river and coast works and highlights some of the relevant policies, technical guidance and guidelines and good practices on the ground. This study also documents how Eco-DRR policy evolved and implemented after the GEJE and addresses some of the challenges in its implementation. In order to draw additional insights, the reconstruction processes of Hurricane Sandy in the United States (US) was also reviewed as GEJE and Sandy shares some common features. Experience from Sandy suggests the importance of the participatory planning process rather than technical guidance or guidelines. Although it is too early to judge whether either reconstruction process was better or not, nor difficult to generalize the conclusion from only two samples, these two experiences suggest only technical guidance and guidelines is not sufficient to mainstream Eco-DRR/CCA in the reconstruction from large scale, rare and infrequent disasters. It is also suggested that the critical role of participatory planning process with cross-sector, cross-professional and interactive design approach may lead more innovative solutions..|
|8.||Yukihiro Shimatani, Jun Nishihiro, Junichi Hirota, Taisuke Miyauchi, Kunihiko Amano, Panel discussion
Resilience of nature and local society under the climate change environment - A future perspective of Ecology and Civil Engineering Society, Ecology and Civil Engineering, 10.3825/ece.20.147, 20, 1, 147-159, 2017.01.
|9.||Yukihiro Shimatani, The resilience of nature and local community under climate change and population decreasing, Ecology and Civil Engineering, 10.3825/ece.20.133, 20, 1, 133-135, 2017.01, In recent years, I feel strongly that social circumstances surrounding ecology and civil engineering society are changing drastically. One of them is the appearance of the concept of green infrastructure. Green infrastructure is a concept of natural resources as an infrastructure which is a lower structure supporting society and furthermore the concept of utilizing the natural environment for sustainable maintenance or development of society and economy. For the society based on ecology and civil engineering, it can be said that it is a concept or approach with extremely high affinity. The initial goal of the establishment of the society was "coexistence of people and living things"" preservation of biodiversity"" sustainment of healthy ecosystems". The green infrastructure aims to "utilize the functions of ecosystems for management of the national land." Boldly speaking about green infrastructure is to shift from" conservation of ecosystem" to "conservation+utilization of ecosystem" and from "civil engineering" to "land management". When considering the development of ecology and civil engineering society, I feel that it is important to clearly position this new concept as a goal of the academic society..|
|10.||Rei Itsukushima, Yukihiro Shimatani, Study of segment-based ecoregions using fish fauna for conserving river environments in Kyushu, Japan, Ecological Engineering, 10.1016/j.ecoleng.2016.10.024, 97, 465-475, 2016.12, Selecting sites for river restoration projects or performing ex post evaluation must be done in ecoregions with comparable biological integrity. Moreover, to evaluate the integrity of a river ecosystem that varies from the headwater to downstream regions, adjustments of the ecoregion according to the longitudinal change in biota must be made. We defined regions where biota are identical according to the direction of change along the stream path as “segment-based ecoregions.” We delineated segment-based ecoregions using fish fauna data for two ecoregions in Japan: the northeast Kyushu, and south Kyushu. The northeast Kyushu ecoregion was divided into three segment-based ecoregions, and south Kyushu ecoregion into five segment-based ecoregions. Classifying fish fauna within the same ecoregion enables classification by differences in the longitudinal change in the stream path rather than by differences in watersheds. Specific topographic regions such as the amphitheater areas of the south Kyushu ecoregion was classified as independent segment-based ecoregions. We further defined indicator fish species for each segment-based ecoregion. Indicator fish species reflected the fish fauna of each ecoregion in the midstream area, such as migratory Gobiidae of the south Kyushu ecoregion. Applying the segment-based ecoregion concept helps compare the biological integrity of fish fauna depending on a common environmental type between watersheds..|
|11.||Sampei Yamashita, Ryoichi Watanabe, Yukihiro Shimatani, Smart adaptation activities and measures against urban flood disasters, Sustainable Cities and Society, 10.1016/j.scs.2016.06.027, 27, 175-184, 2016.11, Frequent inundation has become a serious problem in urban areas. It is necessary to improve rainwater retention/infiltration in the urban watershed. The purpose of this study is to report how private rainwater-retention/harvesting facilities can be spread gradually but steadily in the city by citizen-initiated activities. Rainwater harvesting tanks were installed intensively and a rainwater harvesting house was constructed in the city of Fukuoka, Japan after the city experienced a flood disaster. The former enhanced users’ daily preparedness for emergency, and the latter inspired construction of a rainwater-harvesting housing complex. A public elementary school is in use from April 2016, which is inspired by these facilities. The school premises are located on the land reclaimed from an old irrigation pond. Thus the school needs to be adapted to this condition. 3000 m3 of rainwater can be retained within the premises. The amounts of retention and discharge are monitored, and the data is utilized for science education. In big cities, people tend to depend too much on the top-down, mega-system, which invites more impervious surfaces in urban areas. Bottom-up, individual/collaborative approaches should be adopted in order to achieve multiple purposes of preventing/mitigating disasters, preserving/conserving ecosystems and nurturing/rebuilding communities in the city..|
|12.||Rei Itsukushima, Yukihiro Shimatani, Study of segment-based ecoregions using fish fauna for conserving river environments in Kyushu, Japan, Ecological Engineering, 97, 465-475, 2016.10.|
|13.||Norio Onikura, Tomonori Kawamoto, Kaito Sawa, Yuichi Kitagawa, Akihiko Koyama, Hiroyuki Otsubo, Hironori Hayashi, Tomoko Minagawa, Yukihiro Shimatani, Prioritization procedure for protecting native bitterling species with consideration for invasions by several alien species: A case study around the Kikuchi river basin, Kyushu Island, Japan, Nippon Suisan Gakkaishi, 82, 6, 945-947, 2016.09.|
|14.||Rei Itsukushima, Kazufumi Ideta, Yuki Iwanaga, Tatsuro Sato, Yukihiro Shimatani, Evaluation of infiltration capacity and water retention potential of amended soil using bamboo charcoal and humus for urban flood prevention, Journal of Earth Science and Engineering, 6, 150-163, 2016.09.|
|15.||Itsukushima Rei, Iwanaga Yuki, Ideta Kazufumi, Sato Tatsuro, Shimatani Yukihiro, Study on Outflow Control Effect of On-Site Storage and Soil Improvement for Small Watershed, Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 72, 2, 49-58, 2016.09.|
|16.||Yuichi Kano, David Dudgeon, So Nam, Hiromitsu Samejima, Katsutoshi Watanabe, Chaiwut Grudpan, Jarungjit Grudpan, Wichan Magtoon, Prachya Musikasinthorn, Phuong Thanh Nguyen, Bounthob Praxaysonbath, Tomoyuki Sato, Koichi Shibukawa, Yukihiro Shimatani, Apinun Suvarnaraksha, Wataru Tanaka, Phanara Thach, Dac Dinh Tran, Tomomi Yamashita, Kenzo Utsugi, Impacts of dams and global warming on fish biodiversity in the Indo-Burma hotspot, PLoS One, 10.1371/journal.pone.0160151, 11, 8, 2016.08, Both hydropower dams and global warming pose threats to freshwater fish diversity. While the extent of global warming may be reduced by a shift towards energy generation by large dams in order to reduce fossil-fuel use, such dams profoundly modify riverine habitats. Furthermore, the threats posed by dams and global warming will interact: for example, dams constrain range adjustments by fishes that might compensate for warming temperatures. Evaluation of their combined or synergistic effects is thus essential for adequate assessment of the consequences of planned water-resource developments. We made projections of the responses of 363 fish species within the Indo-Burma global biodiversity hotspot to the separate and joint impacts of dams and global warming. The hotspot encompasses the Lower Mekong Basin, which is the world's largest freshwater capture fishery. Projections for 81 dam-building scenarios revealed progressive impacts upon projected species richness, habitable area, and the proportion of threatened species as generating capacity increased. Projections from 126 global-warming scenarios included a rise in species richness, a reduction in habitable area, and an increase in the proportion of threatened species; however, there was substantial variation in the extent of these changes among warming projections. Projections from scenarios that combined the effects of dams and global warming were derived either by simply adding the two threats, or by combining them in a synergistic manner that took account of the likelihood that habitat shifts under global warming would be constrained by river fragmentation. Impacts on fish diversity under the synergistic projections were 10-20% higher than those attributable to additive scenarios, and were exacerbated as generating capacity increased-particularly if CO2 emissions remained high. The impacts of dams, especially those on river mainstreams, are likely to be greater, more predictable and more immediately pressing for fishes than the consequences of global warming. Limits upon dam construction should therefore be a priority action for conserving fish biodiversity in the Indo-Burma hotspot. This would minimize synergistic impacts attributable to dams plus global warming, and help ensure the continued provision of ecosystem services represented by the Lower Mekong fishery..|
|17.||Rei ITSUKUSHIMA, Shinya IKEMATSU, Miho NAKANO, Mina TAKAGI, Yukihiro SHIMATANI, Optimal Structure of Grated Bottom Intakes Designed for Small Hydroelectric Power Generation, Journal of Renewable and Sustainable Energy, 8, 3, 2016.05.|
|18.||Rei ITSUKUSHIMA, Kazufumi IDETA, Yuki IWANAGA, Tatsuro SATO, Yukihiro SHIMATANI, Evaluation of Infiltration Capacity and Water Retention Potential of Amended Soil Using Bamboo Charcoal and Humus for Urban Flood Prevention, Journal of Earth Science and Engineering, 6, 2016.05.|
|19.||Rei Itsukushima, S. Ikematsu, M. Nakano, M. Takagi, Yukihiro Shimatani, Optimal structure of grated bottom intakes designed for small hydroelectric power generation, Journal of Renewable and Sustainable Energy, 10.1063/1.4948918, 8, 3, 2016.05, Water intake structure is an important element technology for small hydroelectric generation. Currently, intake structures with bar screens have been broadly introduced; however, these require constant maintenance to avoid the clogging of bars by dust or gravel. This study considers the optimal structure of bottom intakes by focusing on two criteria: efficient water intake and prevention of clogs by trapping trash. Grating was selected as the intake structure because it is convenient to construct, widely available, and cheaper than other materials. A flume experiment was conducted to examine the relation between the grating structure and the intake efficiency and trash-trapping rate. Results indicate a clear linear relation between the installation angle and water intake capacity. Furthermore, the trash-trapping rate is low for gratings that have high opening area ratios because their surface areas are small and friction resistance is low..|
|20.||Sampei Yamashita, Sadanori Matsuda, Ryoichi Watanabe, Yukihiro Shimatani, Toshiyuki Moriyama, Hironori Hayashi, Hiroki Iyooka, Teruki Hamada, Terukazu Yamashita, Kumiko Kakudo, Tomoko Minagawa, A Registration System for Preventing/Mitigating Urban Flood Disasters as One Way to Smartly Adapt to Climate Change in Japanese Cities, International Review for Spatial Planning and Sustainable Development, 4, 2, 18-29, 2016.03.|
|21.||Rei Itsukushima, Kazuhumi Ideta, Yuki Iwanaga, Yukihiro Shimatani, Evaluation of infiltration capacity and water retention potential of amended soil using bamboo charcoal and humus for urban flood prevention, 11th International Symposium on Ecohydraulics, 2016.02.|
|22.||Tatsuro Sato, Yuichi Kano, Liangliang Huang, Tomomi Yamashita, Jianhua Li, Yukihiro Shimatani, Relationships between fish richness, habitat diversity and channel parameters in gravel-bed streams in The East Tiaoxi River Basin, China, 11th International Symposium on Ecohydraulics, 2016.02.|
|23.||Hironori Hayashi, Yukihiro Shimatani, Mikako Hattori, A practice of stream restoration project in urban area and its evaluation, 11th International Symposium on Ecohydraulics, 2016.02.|
|24.||Hironori Hayashi, Yukihiro Shimatani, Yusuke Inaguma, Does hydraulic characteristic of fresh water mussel decide its distribution? –A Case Study in Azamenose in Japan, 11th International Symposium on Ecohydraulics, 2016.02.|
|25.||Nakano Miho, Yamashita Terukazu, Shimatani Yukihiro, A case study on installation of small hydropower plants: Focusing on the small hydropower potential survey with resident initiation, 11th International Symposium on Ecohydraulics, 122-129, 2016.02.|
|26.||Tomiyama Yuta, Onikura Norio, Kawamoto Tomonori, Chiwa Masaaki, Shimatani Yukihiro, Trophic variation in the dark chub, 'Candidia temminckii', based on carbon and nitrogen stable isotope ratios in the Tatara river system, Northern Kyushu Island, Japan , 11th International Symposium on Ecohydraulics , 226-231, 2016.02.|
|27.||Sampei Yamashita, Sadanori Matsuda, Ryoichi Watanabe, Yukihiro Shimatani, Toshiyuki Moriyama, Hironori Hayashi, Hiroki Iyooka, Teruki Hamada, Terukazu Yamashita, Kumiko Kakudo, Tomoko Minagawa, A registration system for preventing/mitigating urban flood disasters as one way to smartly adapt to climate change in Japanese cities, International Review for Spatial Planning and Sustainable Development, 10.14246/irspsd.4.2_18, 4, 2, 18-29, 2016.01, Intensive rainfall and frequent inundation have become a serious problem in urban areas all over the world. Climate change and heat island effect may be the cause of the phenomena. Widespread impervious pavement/surface of the ground makes things worse. In order to promote an effective river basin management in urban areas and reduce runoff, a registration system called "Safety Plan for 100mm/h-Rainfall" ("100mm/h Anshin Plan" in Japanese), a scheme for preventing and mitigating inundation caused by extremely heavy, short-term rainfall (such as 100mm/h-rainfall) was established in April 2013 by the central government in Japan. This study carried out a questionnaire survey to examine how municipalities effectively utilize the registration scheme for their watershed management. As a result, it is found that there are municipalities who have started/revised subsidizing installation of private rainwater retention/infiltration facilities in association with the registration system; however, municipalities in general are not so active in promoting runoff reduction by subsidizing private facilities. In addition, in the plans emphasizing public works for runoff reduction, public involvement is not so active, whereas in the plans devised with relatively new committees of watershed management, public involvement as well as private retention activities tend to be active. Based on the results, prospects of how a safety plan should be utilized in an urban watershed are discussed and examined from practicality's point of view..|
|28.||Futoshi Nakamura, Yukihiro Shimatani, Jun Nishihiro, Kazuaki Ohtsuki, Rei Itsukushima, Hiroyuki Yamada, Investigation team for the 2015 flood disaster in Kinu river organized by the president of ecology and civil engineering society
Report on flood disaster in Kinu river, occurred in September, 2015., Ecology and Civil Engineering, 119, 2, 259-267, 2016.01.
|29.||Rei Itsukushima, Tatsuro Sato, Kento Nishida, Yuki Masago, Tomonori Sakata, Yukihiro Shimatani, Existing knowledge about step-pool structures and their application to river engineering in mountain rivers, Ecology and Civil Engineering, 119, 2, 165-180, 2016, Here, we review existing knowledge about step-pool structures in mountain rivers with reference to their morphology, process of formation, destruction, hydraulic function, restoration, and ecological function. First, we present the constructive factors of steppool structures and their appearance, focusing on channel bed profile. Second, we summarize the processes driving the formation and destruction of step-pools, concentrating on current and sedimentation. The untidune and keystone theories are discussed as the key concepts of step-pool formation in relation to the installation of artificial step-pool structures. Third, with reference to previous studies, we discuss the relationship between step-pool structures and river course characteristics. Fourth, we describe the law of resistance and velocity in a mountain river. Finally, with reference to their ecological function, we discuss the use of step-pool structures in restoration projects. Based on earlier studies of step-pool structures, we discuss future issues and propose studies to technologize and standardize step-pool structures for river improvement and restoration..|
|30.||Norio Onikura, Tomonori Kawamoto, Kaito Sawa, Yuichi Kitagawa, Akihiko Koyama, Hiroyuki Otsubo, Hironori Hayashi, Tomoko Minagawa, Yukihiro Shimatani, Prioritization procedure for protecting native bitterling species with consideration for invasions by several alien species
A case study around the Kikuchi river basin, Kyushu Island, Japan, Nippon Suisan Gakkaishi, 10.2331/suisan.16-00044, 82, 6, 945-947, 2016.
|31.||Rei ITSUKUSHIMA, Yukihiro SHIMATANI, Relationship between Estuarine Shellfish Fauna and Physical Environmental Characteristics For Estuary Conservation In Kyushu, Japan, Curr World Environ 2015, 10, 3, 2015.12.|
|32.||Masayuki Horio, Sawako Shigeto, Ryota Ii, Yukihiro Shimatani, Masato Hidaka, Potential of the 'Renewable Energy Exodus' (a mass rural remigration) for massive GHG reduction in Japan, Applied Energy, 10.1016/j.apenergy.2015.03.087, 160, 623-632, 2015.12, For the utilization of renewable energy from sources widely distributed in low-density non-urban areas the grid augmentation for its transmission to urban areas of high population density is often discussed under the premise that the present demand distribution remains invariant. Instead of grid augmentation, this study examined an alternative option of creating a power demand close to renewable sources and inducing population movements (i.e., Renewable Energy Exodus). First, the capacity of renewable energy to maintain populations in hilly and mountainous farming areas of Japan was evaluated from two perspectives: Task (1) a challenging nationwide balance based on possible energy demand saving scenario for the future, and Task (2) a conservative nationwide balance based on the current per capita energy demand and on the region-by-region generation-consumption matching concept. Because Task (2) indicated that Hokkaido, the northern-most island, has a huge capacity, Task (3) was conducted for Hokkaido by examining both energy balance and economic evaluation including job creation for the following two scenarios: (A) a supply to Tokyo scenario and (B) a local demand generation scenario, keeping the same conservativeness as Task (2) by using the current data for energy consumption per capita. The nationwide Renewable Energy Exodus estimates gave 48 million people for Task (1) (with the future per capita energy demand) and 10 million people for Task (2) (with the current per capita energy demand and region-by-region self-sustained balance), respectively. For Hokkaido Task (3) (with an additional economic assessment) gave 1 million people. The Renewable Energy Exodus concept combined with the green economy promotion was found to have a significant merit for a sustainable future of countries like Japan where economic and social disparities are serious between urban areas and non-urban areas..|
|33.||Wataru Tanaka, Rottapon Wattanasiriserekul, Yuta Tomiyama, Tomomi Yamasita, Wikit Phinrub, Tosapol Chamnivikaipong, Apinun Suvarnaraksha, Yukihiro Shimatani, Influence of Floodplain Area on Fish Species Richness in Waterbodies of the Chao Phraya River Basin, Thailand, Open Journal of Ecology, 5, 9, 434-451, 2015.09.|
|34.||Sampei Yamashita, Ryoichi Watanabe, Yukihiro Shimatani, Smart Adaptation to Flooding in Urban Areas, Procedia Engineering, 10.1016/j.proeng.2015.08.449, 118, 1096-1103, 2015.01, Frequent inundation has become a serious problem in urban areas all over the world in recent years. It is necessary to improve rainwater retention and infiltration in the urban watershed. The purpose of this study is to report how private rainwater-retention/harvesting tools/facilities can be spread gradually but steadily in the city, as a smart way to responding to urban flood-disaster risks. Rainwater harvesting tanks (0.2 m3) were installed intensively in 2010 and a rainwater harvesting house (42 m3) was constructed in 2012 in the city of Fukuoka, Japan after the city experienced a flood disaster in 2009. The former enhanced users' daily preparedness for emergency, and the latter inspired construction of a rainwater-harvesting housing complex (108m3) in an adjacent city. An elementary school is under construction from November of 2014 by another, nearby municipality inspired by these facilities. The school premises are located on the land reclaimed from an old irrigation pond. Thus the school needs to be adapted to this condition. 3,800 m3 of rainwater can be retained within the school premises. The water is used to flush the toilet and water flowers to be grown by pupils. The amounts of retention and discharge will be monitored, and the data will be utilized for science education. In big cities, people tend to depend too much on the top-down, mega-system involving dredging rivers, strengthening drainage systems, constructing flood walls, etc., which invites more man-made, impervious surfaces in urban areas. Bottom-up, individual and/or collaborative approaches should be adopted in order to achieve multiple purposes of preventing/mitigating disasters, preserving/conserving ecosystems and nurturing/rebuilding communities in the city..|
|35.||Jia Liu, Hironori Hayashi, Yusuke Inakuma, Shinya Ikematsu, Yukihiro Shimatani, Tomoko Minagawa, Factors of Water Quality and Feeding Environment for a Freshwater mussel’s (Anodonta lauta) Survival in a Restored Wetland, Wetlands, 10.1007/s13157-014-0549-7, 34, 5, 865-876, 2014.10, Wetland plays important roles in river ecosystems. However, the area of wetland decreased considerably due to excessive construction and land use with economic development. For recovering river ecosystem, the wetland named Azame-no-se was restored in the Matsuura River, which is located in Saga Prefecture in Kyushu, Japan. Anodonta lauta, a freshwater mussel that lives in the lentic water of wetlands, played an important role in a river. However, A. lauta lost its habitat and became endangered in Japan. A. lauta was found surviving in the Azame-no-se Wetland; however, only recently researchers have begun to understand the mechanisms that allow this mussel to now prosper there. This study investigated mussel survival mechanisms in the restored Azame-no-se Wetland. Mussel motility, coverage of Trapa japonica (an aquatic plant) and water quality were investigated in three pools (Shitaike, Ueike, and Tomboike) of the Azame-no-se Wetland and in still water in the Matsuura River (May 2011–2012). A feeding behavior experiment was also conducted in Ueike Pool two times in 2012. Results showed that this pool had abundant nutrients (thanks to its high flood frequency) that supported the growth of certain phytoplankton species possibly important for A. lauta. Dissolved oxygen was another important factor. Although Shitaike Pool shared similar conditions with Ueike Pool, the mussel became extinct when the dissolved oxygen decreased because of the lush growth of T. japonica in Shitaike Pool. This study indicated that the factors essential for A. lauta’ survival in the restored wetland were dissolved oxygen (DO), nutrients, and phytoplankton species. These results could be helpful for understanding functions of restored wetland and further offer suggestions for managing river–floodplain system..|
|36.||Sampei Yamashita,, Ryoichi Watanabe,, Yukihiro Shimatani, Rainwater Harvesting for Urban Flood-Disaster Mitigation, Proceedings of 4th Int’l Conference of Urban Biodiversity and Design, P178-P179, 2014.06.|
|37.||Yukihiro Shimatani, Liangliang Huang, Jianhua Li, Yuichi Kano, Tatsuro Sato, Jyunichi Kitamura, Zhiqiang Wu, Microhabitat Use and Population Structure of a Chinese Kissing Loach, Leptobotia tchangi, in the North Tiaoxi River, China, Open Journal of Ecology, 4, pp337-pp345, 2014.06.|
|38.||Yukihiro Shimatani, Jia Liu,, Yusuke inaguma,, Hironori Hayashi, Shinya Ikematsu, Tomoko Miangawa, Factors of Water Quality and Feeding Environment for a Freshwater mussel’s (Anodonta lauta) Survival in a Restored Wetland,, Wetland, Volume 34, Volume 34, P865-P876, 2014.05.|
|39.||Mina Takagi, Yoshinobu Watanabe, Shinya Ikematsu, Takayoshi Hayashi, Tokihiko Fujimoto, Yukihiro Shimatani, 3D-printed pelton turbine
How to produce effective technology linked with global knowledge, Energy Procedia, 10.1016/j.egypro.2014.12.179, 61, 1593-1596, 2014.01, Small scale hydropower energy goes a long way to fire up community development. Until 1920-30s, Japanese hydropower techniques had been established on a global level in each local area. However, after the second World War, the main energy resource was changed. This has resulted in a local decline in micro-hydro technical expertise and fewer waterwheel makers throughout Japan. At the present, we are going to work to re-make small scale hydropower technologies and markets. In this paper, we discuss and propose improvements to the "Japanese small scale hydropower technology and production techniques, especially Pelton type wheel. The Pelton wheel technology of Nepal was freely available in the public domain so we decided to design a system based on that. We decided to designed by 3D-CAD and to make our Pelton buckets using a 3D printer. We compared the power generation capacity of our waterwheel with one purchased from New Zealand to investigate its effectiveness and efficiency. In our results of the experiment, the power generation curves for each turbine are approximately equal. The power increases continuously with increases in the flow rate. The maximum power generated by each turbine is approximately the same. This shows that it is possible to design a Pelton bucket that has a power generation efficiency comparable to a purchased bucket. The next step, the Pelton turbine designed in this study was chosen to be included in the Itoshima micro-hydro power generation system. So we scaled up and redesigned the Pelton turbine. In addition, we conducted a survey involving waterwheel makers regarding connecting to cost reduction. Using a 3D printer has the following advantages: 1.) Design deficiencies and failed designs can be identified at an early stage. 2.) Different forms of waterwheel can be made at low cost and in a short amount of time, which can then be used to run water experiments..
|40.||Masayuki Horio, Sawako Shigeto, Yukihiro Shimatani, Ii Ryota, Masato Hidaka, The potential for massive ghg reduction by mass rural remigration (the renewable energy exodus)
A case study for Japan, Energy Procedia, 10.1016/j.egypro.2014.12.143, 61, 1442-1445, 2014.01, To break the 'carbon lock-in' mindset adopted by policy makers, the potential for mass rural remigration, as an alternative to the current trend of moving from rural to urban areas was examined. The capacity of renewable energy to maintain populations in hilly and mountainous farming regions was evaluated from two perspectives: (1) an average nationwide estimate based on the future energy demand, and (2) a conservative estimate based on the current energy demand. Because estimate (2) indicated that Hokkaido has a huge capacity, a preliminary cost effectiveness analysis was conducted first for: (A) a Supply to Tokyo scenario, and second for (B) a Local Demand Generation scenario. Both renewable energy exodus scenarios were found to have merit in promoting a sustainable future..
|41.||R. Lopa, Yukihiro Shimatani, Relationship between scenery of flow ecology habitat and physical environment, 7th International Conference on Fluvial Hydraulics, RIVER FLOW 2014 Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2014, 2331-2338, 2014, In small urban rivers, a quantitative study of how many are related to what extent environmental factors such as riverbed materials and other physical environmental factors and the flow rate was classified from the perspective of the landscape has not yet been established. In order to evaluate this environmental restoration project in the Kamisaigo River, Fukuoka Prefecture, Japan, the research study about the basic relationships of habitat and the physical environment was performed. Here we provide a frame of flow ecological habitat evaluation and are measured at 50 m terrain. The results of habitat landscape are as follows; we create a diagram of the depth-velocity-substrate distribution, Reynolds number as a-biotic environment was the best criterion for objectively classifying the rapid/riffle, run and glide respectively, and Froude number was the best criterion for objectively classifying the run, slack/shallow and scour/pool respectively..|
|42.||Yuichi Kano, Yôichi Kawaguchi, Tomomi Yamashita, Tsuneo Sekijima, Yukihiro Shimatani, Yoshinori Taniguchi, A passive integrated transponder tag implanted by a new alternative surgical method
Effects on the oriental weather loach (Misgurnus anguillicaudatus) and application in a small irrigation system, Landscape and Ecological Engineering, 10.1007/s11355-011-0152-5, 9, 2, 281-287, 2013.07, We validated the effects of a passive integrated transponder (PIT) tagging process on the oriental weather loach Misgurnus anguillicaudatus. Laboratory experiments were conducted to assess the effects of PIT tagging on fish survival, growth, wound healing, and tag omission. Two tagging protocols, standard syringe injection versus insertion through a small hole pierced by a fine needle-shaped awl, were compared using a 12.5 × 2.07 mm2 tag. A control group was also included. In comparison with the awl technique, syringe injection heightened the mortality of the loach and delayed healing of the wound caused by tag insertion. No effects of either PIT tagging method were detected on the growth of surviving loach. We also field-tested similarly tagged populations within a river-based irrigation system of Sado Island, Japan. Two different sized tags (long, 12.5 × 2.07 mm2; short, 8.5 × 2.12 mm2) were compared by using antenna loggers which detected fish movement through gates and automatically logged tagged fish's tag IDs and timestamps. By comparing logged data and actual fish collection surveys both below and above the gates, 77% and 30% of actual loach movements were confirmed to have been successfully logged for the long and short tags, respectively. The awl insertion technique with the longer tag is therefore recommended for use in similar studies of smaller fish species..
|43.||Yuichi Kano, Mohad Shalahuddin Adnan, Chaiwut Grudpan, Jarungjit Grudpan, Wichan Magtoon, Prachya Musikasinthorn, Yoshihiro Natori, Stefan Ottomanski, Bounthob Praxaysonbath, Koneouma Phongsa, Achariya Rangsiruji, Koichi Shibukawa, Yukihiro Shimatani, Nam So, Apinun Suvarnaraksha, Phanara Thach, Phuong Nguyen Thanh, Dac Dinh Tran, Kenzo Utsugi, Tomomi Yamashita, An online database on freshwater fish diversity and distribution in Mainland Southeast Asia, Ichthyological Research, 10.1007/s10228-013-0349-8, 60, 3, 293-295, 2013.07.|
|44.||Yuichi Kano, Tatsuro Sato, Liangliang Huang, Chris Wood, Kazuhiro Bessho, Tomotaka Matsumoto, Yukihiro Shimatani, Jun Nakajima, Navigation disturbance and its impact on fish assemblage in the East Tiaoxi River, China, Landscape and Ecological Engineering, 10.1007/s11355-011-0181-0, 9, 2, 289-298, 2013.07, We provide the first evidence for navigation impact on resident river fish in China. The survey was conducted in the East Tiaoxi River that discharges into Lake Taihu near Shanghai, on which cargo ship traffic has dramatically increased in the recent economic development period. Water turbidity, ship traffic and other environmental factors were evaluated at 29 sites on the river. In a multiple regression model with the stepwise method, turbidity was significantly correlated with ship traffic (R 2 = 0.53). Another survey was conducted at 46 sites in the same area of the river, in which environmental factors were evaluated and fish individuals were electrofished. A generalised linear model with the stepwise method was applied to predict ecological indicators of the fish assemblage (species richness, individual density and Shannon's diversity index) based on environmental factors. The results showed that the indicators were negatively correlated with turbidity and presence of artificial shore embankment structures. Another analysis further showed that the negative effect of turbid water was especially considerable for fish of smaller size. In conclusion, cargo ship traffic has a negative impact on fish assemblage, especially on smaller individuals, in the East Tiaoxi River. A higher profile for conservation actions and consideration of environmental impacts of such traffic should be given increasing focus for this and other similar East Asian water courses..|
|45.||Jun Nakajima, Tatsuro Sato, Yuichi Kano, Liangliang Huang, Jyun Ichi Kitamura, Jianhua Li, Yukihiro Shimatani, Fishes of the east Tiaoxi river in Zhejiang Province, China, Ichthyological Exploration of Freshwaters, 23, 4, 327-343, 2013.03, We conducted fish sampling at 90 sites in the East Tiaoxi River, Yangtze River basin, China. Seventy-seven species belonging to 19 families were recorded, and photographs of live specimens are provided for all species. Three exotic species were recorded: Cirrhinus cirrhosus, C. molitorella, Gambusia affinis. The top 3 species-rich families were Cyprinidae (46 %), Cobitidae (5 %) and Gobiidae (5 %). The species composition in the East Tiaoxi River is similar to that of the Yangtze River Basin; however, the East Tiaoxi River has quite a diverse fish fauna for a small river system..|
|46.||Kohei Fujii, Kenichi Tsukahara, Hironori Hayashi, Yasuhiro Mitani, Hiro Ikemi, Cham Tau Chia, Yukihiro Shimatani, Investigation report on the flooding condition in the midstream area of Chao Praya river during the Thai flooding in 2011, Journal of Disaster Research, 10.20965/jdr.2013.p0424, 8, 3, 424-431, 2013.01, Various investigations about the flood condition and dam operation have been conducted on 2011 Chao Praya river flooding. Investigations about the lower reaches of the Chao Praya river, which was heavily damaged, have been conducted, but investigation reports about the flood form of the midstream Chao Praya river, i.e., upstream where the Ping and Nan rivers meet, have hardly been reported. This investigation sorts out the conditions of flooding and the reservoir of the midstream Chao Praya river and the reflow into river channels fromthe floodplain, which is reflooding, inspects them based on field investigations and considers the possibility of reducing flood damage in the lower reaches using the floodplain in the midstream area..|
|47.||Sampei Yamashita, Yukihiro Shimatani, Ryoichi Watanabe, Toshiyuki Moriyama, Tomoko Minagawa, Kumiko Kakudo, Terukazu Yamashita, Comprehensive flood control involving citizens in a Japanese watershed, Water Science and Technology, 10.2166/wst.2013.293, 68, 4, 791-798, 2013, In July 2009, the city of Fukuoka, Japan experienced a flood disaster along the Hii River, which runs through densely populated, concrete-covered areas of the city. The drainage system was overwhelmed and the river overflowed due to heavy rainfall and rapid runoff. The event led citizens in its watershed to plan and implement comprehensive flood control. The plan aims not only to mitigate floods but also to revitalize the river environment and populated communities in urban areas. This study reports the activities led by the citizens. They organized and carried out civic forums, workshops, and fieldwork to share views as to how the flood disaster was caused, how floods in the watershed should be controlled, and how the river environment should be rehabilitated. This study illuminates how people, including the flood victims and municipal engineers, can change drastically and communicate effectively in the course of discussing and implementing the comprehensive flood control measures..|
|48.||R. Lopa, Yukihiro Shimatani, Environmental assessment method for a small-river restoration plan, International Journal of Sustainable Development and Planning, 10.2495/SDP-V8-N4-523-536, 8, 4, 523-536, 2013, Although more than 23,000 river restoration projects have been conducted during the past 15 years in Japan, reliable environmental assessment methods have not yet been identified. The environment of the Kamisaigo River is assessed before restoration. The river had been canalized with concrete revetments, reducing its biological function. In 2007, the Fukutsu City Government initiated a program to restore the environmental quality of the river. The aim of this paper was to determine the best method of assessing the river environment. The fish and the physical environment to assess the environmental condition of the river are surveyed. A fish index developed by Kyushu University adequately represented characteristics of river health and was used to determine which sites warranted restoration, rehabilitation priorities, and appropriate methods. The authors calculated 14 regionally developed indices using the ecological features of the fish at several river sites. The environmental quality of the river varied substantially across seven sampling sites. Using these assessment results, the authors determined the specific weaknesses that affected the condition of each site. A restoration and improvement program based on these findings accomplished several goals, including restoring the floodplain, incorporating a variety of flow rates, and enhancing vegetation for fish spawning..|
|49.||Rei Itsukushima, Yukihiro Shimatani, Yôichi Kawaguchi, The effectiveness of delineating ecoregions in the Kyushu region of Japan to establish environmental indicators, Landscape and Ecological Engineering, 10.1007/s11355-011-0171-2, 9, 1, 27-46, 2013, Throughout Japan, numerous restoration projects and efforts to conserve the river environment are underway. However, in spite of such efforts, effective measures to conserve the river ecosystem or post-evaluation of restoration projects remain insufficient due to a lack of environmental indicators. In many European countries and the United States, a number of biological indicators have been developed and adapted. However, it appears to be difficult to directly apply these indicators to Japan, because its biota is finely classified according to its many islands and peninsulas. The ultimate goal of this study is to comprehensively evaluate indicators of aquatic biodiversity from both physical and biological aspects. We divided the Kyushu region in Japan into several ecoregions as a preliminary step to establish an indicator. We delineated the ecoregions of the Kyushu region using the fish fauna data of 21 rivers within the Kyushu region. Presence-absence (0/1) data for each fish species were used to run a two-way indicator species analysis (TWINSPAN analysis). As a result, the Kyushu region was divided into four ecoregions (A: northwest Kyushu, B1: northeast Kyushu, B2: south Kyushu, and C: Amami-Oshima Island). Each ecoregion was characterized by the following fish species: (A) Cyprinidae, in particular Acheilognathinae, is abundant; (B1) Gobiidae is abundant, while Cyprinidae such as Tanakia limbata (not confirmed in B2) are also present; (B2) Gobiidae is abundant, while Rhingobius sp. DA and Rhingobius sp. CO (not confirmed in B1) are present. These results indicate that the fish fauna of the Kyushu region is finely delineated, and that an assessment standard for biological integrity should be established, based on differences in fish fauna..|
|50.||安永文香 島谷幸宏 藤本穣彦 , SMALL SCALE HYDROPOWER GENERATION TOWARD COMMUNITY DEVELOPMENT :A CASE STUDY OF JAPANESE RURAL AREA, P1-7, 2012.07.|
|51.||Hironori Hayashi, Yukihiro Shimatani, Kotaro Shigematsu, Jun Nishihiro, Shinya Ikematsu, Yôichi Kawaguchi, A study of seed dispersal by flood flow in an artificially restored floodplain, Landscape and Ecological Engineering, 10.1007/s11355-011-0154-3, 8, 2, 129-143, 2012.07, Riverine floodplains play many important roles in river ecosystems. However, many floodplains have suffered degradation or loss of ecological function due to excessive river improvements or through changes in agricultural systems. As a result, many floodplain restoration projects are being conducted worldwide. One of the many methods being implemented to restore floodplain vegetation is flood water seed dispersal. In this technique, precisely estimating the effect of seed dispersal by flood water is important in order to achieve successful floodplain revegetation. Here, we focus our attention on sediment transport by flood water into the Azamenose Swamp, a restored floodplain. We attempt to estimate the function of seed deposition in the restored floodplain and explain how the seeds are deposited in the floodplain by flood water. The result suggests that the restored floodplain functions as a more appropriate deposition site for seeds than the riverbanks of the main river. It was also found that the distance from the inflow site and the weight of the sediment were related to seed deposition..|
|52.||Yitao Liu Tatsro Sato Yukihiro Shimatani・Tomomi Ymashita・Shinya Ikematsu, The Assessment of Restoration Works of a Japanese Mountain Stream：Case Study on the YAMATUKI Stream
, 3thInternational Symposium on Aquatic Environment and Biodiversity Conservation in the East Asian Region, P67-78, 2011.12.
|53.||Tatsuro Sato, Jun Nakajima, Liangliang Huang, Yukihiro Shimatani, Shun K. Hirota, Chris Wood, Yuichi Kano, Distribution pattern of loaches (teleostei
Cobitoidea) in the river east Tiaoxi, China, Folia Zoologica, 60, 4, 328-334, 2011.12, The distribution patterns of loaches (Teleostei: Cobitoidea) were revealed in the River East Tiaoxi in China. Eight loach species (Cobitis sinensis, C. dolichorhynchus, C. laterimaculata, Misgurnus anguillicaudatus, Paramisgurnus dabryanus, Leptobotia tchangi, Vanmanenia pingchowensis and V. stenosoma) were found in field surveys at 90 sites. A macroscale analysis of the geographical distribution showed that related species were segregated in accordance with longitudinal alterations along the river course. M. anguillicaudatus was widely distributed from the middle reaches to upstream of the river whereas the related species, P. dabryanus, was distributed only downstream. Three spined loaches, namely C. dolichorhynchus, C. sinensis, and C. laterimaculata, were distributed in the middle reaches, the middle to upstream reaches, and the upstream section of the river, respectively. The distribution of V. pingchowensis was further upper stream than that of V. stenosoma in the upstream section. More detailed microscale analysis revealed that L. tchangi and the two Vanmanenia species, V. stenosoma and V. pingchowensis were mostly found in the 'Riffle' (lotic) habitats, whereas the two spined loaches, C. laterimaculata and C. sinensis preferred the 'Pool' (lentic) habitats. These results demonstrated that related loach species preferred similar habitat units in the River East Tiaoxi system..
|54.||劉義濤 佐藤辰郎 島谷幸宏 山下奉海 池松伸也 , THE ASSESSMENT OF RESTORATION OF MOUNTAIN STREAM :CAST STUDY OF YAMATUKI STREAM, EAEP2011 The5th International Symposium on the East Asian Enironmental Problems, 119-124, 2011.11.|
|55.||Yuichi Kano・Yoichi Kawaguchi・Tomomi Yamashita・Yukihiro Shimatani , Distribution of the oriental weatherloach,Misgurnus angullicaudatus,in paddy fields and its implications forconservation in Sado Island,Japan
, 日本魚類学会 2012学会賞受賞, P180-188, 2011.07, 佐渡島でのドジョウの分布に関する論文である。.
|56.||Yuichi Kano・Katsutoshi Watanabe・Shin Nishida・Ryo Kakioka・Chiris Wood・Yukihiro Shimatani・Youichi Kawaguchi, Population genetic structure ,diversity and stocking effect of the oriental weatherloach (misgurnus anguillicaudatus)in an isolated island
, Environmental Biology of Fishes 90号, P211-222, 2011.05.
|57.||Rita Lopa Yukihiro Shimatani Hayashi Hronori Nakajima Jun , Applying a fish biological integrity index to a restoration plan in a small-sized river：case study in the Kamisaigo River
, Water Resources Management Ⅵ （WIT Transactions on Ecology and the Environment）〈Vol．145〉 , P113-124, 2011.05.
|58.||Yuichi Kano, Katsutoshi Watanabe, Shin Nishida, Ryo Kakioka, Chris Wood, Yukihiro Shimatani, Yôichi Kawaguchi, Population genetic structure, diversity and stocking effect of the oriental weatherloach (Misgurnus anguillicaudatus) in an isolated island, Environmental Biology of Fishes, 10.1007/s10641-010-9733-7, 90, 3, 211-222, 2011.03, Genetic endemism of island organisms and the threat to such organisms provided by artificially introduced genes are aspects of major interest in evolutionary and conservation studies of fishes. In this paper the genetic population structure of the oriental weatherloach, Misgurnus anguillicaudatus, in Sado Island of Japan was elucidated by phylogeographic analysis based on partial mitochondrial control region sequences. The specimens were sampled at 62 sites in Sado Island and 14 sites on the mainland close to the island. We found various haplotypes of different origins, most of which had already been reported from the mainland and other places of Japan. This suggests that the loach has been historically introduced to the island from various regions of Japan. Of the 62 sites on the island, cultured/nonnative individuals were confirmed to have been stocked at eight specific sites for feeding of re-introduced Japanese crested ibis (Nipponia nippon). By a Mantel test, geographical and genetic distances were not significantly correlated among the local populations in Sado Island. However a significant correlation was found when the eight stocked local populations were excluded from the analysis. This implied that the genetic distribution pattern of the loach on the island has been disturbed by the stocking. In addition, the nucleotide diversity values of stocked local populations were significantly higher than those of other local populations, also a likely outcome of the stocking. In conclusion, the loach on the island likely had their origins in multiple historical introductions and colonizations, where more recent stocking for the ibis has caused further genetic disturbance to their local populations..|
|59.||A STUDY ABOUTHYDRAULIC CHARACTERISTICS OF UNIONOIDA UNDER FLOWING WATER
|60.||EVALUATION BY BENTHOS OF THE GENTLE SLOPE REVETMENT WHICH WAS PROVIDED IN A TIDAL RIVER.|
|61.||島谷幸宏 田中亘 鹿野雄一 山下奉海 斉藤慶 河口洋一, 佐渡島の河川のドジョウ密度を決定する要因とその保全策への応用, Vol14.No1.P1-9, 2011.01.|
|62.||R. Lopa, Hironori Hayashi, Yukihiro Shimatani, J. Nakazima, Applying a fish biological integrity index to a restoration plan in a small-sized river
Case study in the Kamisaigo River, 6th International Conference on Sustainable Water Resources Management, WRM 2011 Water Resources Management VI, 10.2495/WRM110101, 145, 113-124, 2011.01, Although many river restoration projects have been conducted in Japan, reliable results concerning the environmental assessment methods have not yet been obtained. Therefore, we conducted a study on the Kamisaigo River, a tributary of the Saigo River, which flows through the city of Fukutsu, Japan. The study river had been canalized for alignment, with concrete revetment of the river bank, in turn reducing the biological function of the river. In 2007, Fukutsu City Government initiated a restoration program to improve the environmental quality of the river. The aim of the present study was to determine the optimal method of evaluating the river environment. We surveyed the fish fauna and physical environment to assess the environmental condition of the river using a fish index developed by Kyushu University. This index incorporates 16 indicators based on fish behaviour and life history (e.g. preferred flow rate, environmental requirements for spawning). The survey results from seven sampling stations indicated that the environmental quality of the river substantially varies across sites. Due to the presence of a diversity of habitat types, station 1 was in good condition compared with the other six stations. In contrast, stations 2 and 6 were in moderate to poor condition with low values of at least one indicator. Using these assessment results, we will be able to determine the specific weaknesses that affect the condition of a given station. Based on these findings, a restoration and improvement program should be established to accomplish several goals, including restoring the flood plain, incorporating a variety of flow rates, and enhancing vegetation for fish spawning..
|63.||Mohd Shalahuddin Adnan, Yukihiro Shimatani, Zulkafli Abd Rashid, Anthropogenic impacts on water quality and water resources of the Pahang River, Malaysia, 5th International Symposium on Integrated Water Resources Management, IWRM 2010 and the 3rd International Symposium on Methodology in Hydrology Hydrological Cycle and Water Resources Sustainability in Changing Environments, 350, 90-97, 2011, River water quality in the Pahang River and its adjacent tributaries is facing degradation due to increasing anthropogenic activities along the river bank. This study was initiated with the aim of investigating the effects of human activities and its impacts on water quality and water quantity. The spatial and temporal changes, as well as the human activities along this river are determined by analysing and calculating the water quality Index (WQI) and applying statistical approaches: principal component analysis (PCA) and cluster analysis (CA), to explore the relationship between anthropogenic activities and environmental variables. From the results obtained, it was seen that the WQI was highly correlated with the activities along the river bank. Human disturbance has severely degraded the water quality and ecosystem integrity, thereby depleting water resources. In addition, we speculate the significant decreasing trend between upstream and downstream of the Pahang River. Thus, serious mitigation steps should be proposed to protect our valuable resources..|
|64.||Wataru Tanaka, Yuichi Kano, Tomomi Yamasita, Kei Saitou, Yoichi Kawaguchi, Yukihiro Shimatani, Determinants of the Misgurnus anguillicaudatus population and its application to conservation planning in Sado Island, Japan, Ecology and Civil Engineering, 10.3825/ece.14.1, 14, 1, 1-9, 2011, This paper aims to propose concrete measures for the conservation of the mud loach (Misgurnus anguillicaudatus) in Sado Island of Japan, associated with the reintroduction of Japanese crested ibis (Nipponia nippon) that has a predilection to feed on the loach. The field survey was conducted at 80 sites on 7 rivers in the island in August 2007 and March 2008, in which the loach density and the micro-scale environmental factors (water depth [WD], degree of aquatic vegetation [AV], degree of riparian forest [RF], current velocity [CV], mud river bed [MB], concreted river bed [CB], and river bed pebble size [PS]) of the habitats were surveyed. Additionally, the macro-scale factors (paddy fields area [PA] and reservoirs area [RA] within a specific buffer circle) were also obtained using GIS software. The analysis using GLM and AIC showed that the AV (positive), MV (positive), CB (negative) and RA (positive), and AV (positive), MV (positive) and PA (positive) effect the loach density in August and March, respectively, indicating that the loach preferred the less artificial habitat surrounded by the paddy fields. The potential maps of the loach density were drawn by adapting the models on the rivers in the island: The loach density was especially high in the Kuninaka Plain that situated at central region of the island in both August and March, indicating the region was priority area for the conservation of the loach. In conclusion, removal of concrete revetment in the habitats and improvement of creek networks between rivers and landscape elements (paddy field and reservoirs) in the Kuninaka Plain would be the effective conservation measurements for the loach..|
|65.||ASSESSING RIVERINE ENVIRONMENTS FOR BIOLOGICAL INTEGRITY ON THE BASIS OF ECOLOGICAL FEATURES OF FISH.|
|66.||Toward a Regeneration of Relations between Humans and Nature.|
|67.||HOW DO WE ADVANCE THE INTEGRATED WATERSHED MANAGEMENT FOR FLOOD CONTROL AND LIBING ENVIRONMENT USING ON-SITE STROM WATER STRAGE SYSTEM?
|68.||THE ENDOTHERMIC EFFECT OF NATURAL SUBTROPICAL ESTUARIES AND A POLICY FOR CONSERVATIONS OF AN ENDAMEGED FISH LARVAE.|
|69.||THE COMPARISON OF THE SEDIMENT DEPOSITION SPEED IN THE DIFFERENT AREA OF CROSS-SECTIONAL PROFILE ON A SAND BED RIVER IN FUKUOKA PREFECTURE.|
|70.||A CASE STUDY ABOUT MAINTENANCE MANAGEMENT ON RIVER RESTORATION PROJECT.|
|71.||ASSESSMENT OF RIVER ENVIRONMENT IN THE EAST TIAOXI BASIN, CHINA USING GPS-LOGGER, GOOGLE EARTH AND LANDSAT IMAGES.|
|72.||REDUCTION IN CO2 EMISSIONS BY DIFFERENCES IN RIVER WORKS METHODS.|
|73.||Mohd Shalahuddin Adnan, Yukihiro Shimatani, Jamaluddin Ibrahim, Zulkafli Abd Rashid, Applying a Fish-Based Index of Biotic Integrity to Assess the Ecological Health of the Pahang River, Pahang, Malaysia, Hydrology and Environment National Conference, 2010.06.|
|74.||Mayumi Sato, Yoichi Kawaguchi, Hiroki Yamanaka, Tomoyuki Okunaka, Jun Nakajima, Yasuhiro Mitani, Yukihiro Shimatani, Takahiko Mukai, Norio Onikura, Predicting the spatial distribution of the invasive piscivorous chub (Opsariichthys uncirostris uncirostris) in the irrigation ditches of Kyushu, Japan: a tool for the risk managenment of biological invasions, biol Invasions, DOI 10.1007/s10530-010-9762-3, 2010.05.|
|75.||Rei Itsukushima, Yukihiro Shimatani, Jun Nakajima, Yoichi Kawaguchi, SEGMENT-BASED ECOREGIONS BASED ON FISH FAUNA AS A BIOLOGICAL INDICATOR, Journal of Hydroscience and Hydraulic Engineering, Vol.28, No.1, P55-67, 2010.05.|
|76.||Mayumi Sato, Yôichi Kawaguchi, Hiroki Yamanaka, Tomoyuki Okunaka, Jun Nakajima, Yasuhiro Mitani, Yukihiro Shimatani, Takahiko Mukai, Norio Onikura, Predicting the spatial distribution of the invasive piscivorous chub (Opsariichthys uncirostris uncirostris) in the irrigation ditches of Kyushu, Japan
A tool for the risk management of biological invasions, Biological Invasions, 10.1007/s10530-010-9762-3, 12, 11, 3677-3686, 2010.05, The piscivorous chub (Opsariichthys uncirostris uncirostris) has widely invaded Kyushu Island in Japan, and its presence in irrigation ditches known as creeks around Ariake Bay has caused particular concern because various native freshwater fishes are also known to exist in the region. In order to examine the habitat characteristics that are related to its occurrence, we developed a species distribution model for piscivorous chub that inhabits creeks in the Kase river catchment by using geographic and habitat variables that were both biotic and abiotic. We then evaluated the model by using a different data set from the adjacent Chikugo river catchment. The resulting multiple logistic regression model, whose performance was supported by a high value of 0. 881 for the area under the receiver operating characteristics curve (AUC), indicated that the occurrence of piscivorous chub was strongly affected by the watercourse distance from the source populations in the Kase river. The model's performance was still high (AUC = 0. 792) when tested with the data set from the Chikugo river catchment. We also produced a GIS map that projects the predicted distribution of piscivorous chub across all creeks within the Kase river catchment. The result is likely to reflect the connectivity between static and lentic habitat and is not merely a question of the simple distance from the source populations. We also discuss how the potential distribution map can be applied to the management of piscivorous chub..
|77.||Yuichi Kano, Yôichi Kawaguchi, Tomomi Yamashita, Yukihiro Shimatani, Distribution of the oriental weatherloach, Misgurnus anguillicaudatus, in paddy fields and its implications for conservation in Sado Island, Japan, Ichthyological Research, 10.1007/s10228-009-0146-6, 57, 2, 180-188, 2010.04, The distribution of the oriental weatherloach, Misgurnus anguillicaudatus, together with related environmental factors were surveyed at 185 paddy field locations on Sado Island in Japan. This was associated with the reintroduction of the Japanese crested ibis, Nipponia nippon, which prefers to feed on the loach. Loach were found to be present at 90 locations (49%). Analysis with GIS, GLM and AIC revealed that positive factors for the loach distribution included the presence of an earth ditch, the connections at outlets and the proportion of paddy field area within an 800 m radius. Conversely, pumping-up water irrigation and flow irrigation affected loach distribution negatively. In an interview survey that was conducted concurrently, older farmers in the area recalled that the loach had once been distributed over almost the entire island (89/96, 93%) about half a century ago. The farmers also suggested that the impact of agricultural chemicals was one of the main reasons for loach reduction or local extinction. A map of the current potential loach distribution was made using the best fit model from GIS variables. The loach was expected to be distributed in the Kuninaka region with high probability (60-100%) and in patches in the Osado and Kosado regions with low-medium probability (10-50%). As a feasible scenario for the conservation of the loach, another predictive map of the loach distributions was made using a model fit based on the GIS variables and outlet connection, in which the all of the outlets were presumed to be connected to the ditches without gaps. In this case, the loach were expected to be distributed almost throughout the paddy fields with medium-high probability (40-100%). In another scenario that presumed the complete land consolidation of all the paddy fields, the probability of loach occurrence was low (0-30%) throughout the island with the exception of the island's center in the Kuninaka region..|
|78.||Tomomi Yamashita, Yôichi Kawaguchi, Yoshinori Taniguchi, Yuichi Kano, Taeko Ishima, Mami Oishi, Wataru Tanaka, Kei Saitou, Tsuneo Sekijima, Yukihiro Shimatani, Evaluation of irrigation weir improvement for fishes in a stream, Sado Island, Japan. Ecol. Civil Eng. 13(1), 61-76, 2010, Ecology and Civil Engineering, 10.3825/ece.13.61, 13, 1, 61-76, 2010.|
|79.||Yukihiro SHIMATANI, Procedure of Research on Ecological Engineering Assessment in the Taihu Lake Watershed, The 1st International Symposium in Aquatic Environment and Biodiversity Conservation in the Lake Taihu Basin, ｐｐ12, 2009.11.|
|80.||Hironori HAYASHI, Yukihiro SHIMATANI, Yoichi KAWAGUCHI, A study on Seed Dispersal by Hydrochory in Floodplain Restoration, The Third Interagency Conference on Research in the Watersheds, ｐｐ233-235, 2009.10.|
|81.||Hiroki IYOOKA, Akihito NAKAO, Tetsuya KUSUDA, Yukihiro SHIMATANI, The Change of The Salinity Effect and Phototaxis on The Larval Vertical Distribution of Japanese Brackish Crab, Deiratonotus Japonicas, Proceedings of The Third International Conference on Estuaries and Coasts, Vol.1, 336-340, 2009.09.|
|82.||Kazuaki OHTSUKI, Ayama UENO, Yukihiro SHIMATANI, Youichi KAWAGUCHI, Akihiko SHINOMIYA, Cooling Functions of Tidal Flats and Mangroves in Association with Conservation of Ryukyu-ayu, Plecoglossus Altivels Ryukyuensis, Proceedings of The Third International Conference on Estuaries and Coasts, Vol.1, ｐｐ380-387, 2009.09.|
|83.||Mayumi SATO,Yoichi KAWAGUCHI, Jun NAKAJIMA, Takahiro MUKAI, Yukihiro SHIMATANI, Norio ONIKURA, A review of the research on introduced freshwater fishes: new perspectives, the need for research, and management implications, Landscape Ecol Eng , 10.1007/s11355-009-0086-3, 2009.08.|
|84.||Movement Limit Tachometry Experiment Between Mussels on Fixed Bed Channel.|
|85.||A Case Study on Consensus-Building with Citizns on River Restoration.|
|86.||The Record and Analysis of Science Cafe about Reintroduction of Crested Ibis into Sado Island -The Study of the Guide for Scientists for Science Cafe Administration-
|87.||A CASE STUDY ON ECOLOGY AND TRANSPORTATION SYSTEM OF ANODONTA (BIVAL VIA:UNIONIDAE)IN FLOODPLAIN RESTORATION.|
|88.||THE OBSERVATION FOCUSED ON THE COOLING FUNCTIONS OF TIDAL FLAT AND MANGROVE FOR THE PROTECTION OF THE RYUKYU-AYU.|
|89.||SEGMENT BASED ECOREGIONS BASED ON FISH FAUNA FOR BIOLOGICAL INDICATOR.|
|90.||林博徳、島谷幸宏、河口洋一, A study on seed dispersal by hydrochory in floodplain restoration, Third Interagency Conference on Research in the Watersheds, P47-48, 2008.09.|
|91.||Enviornmental Conservation Measures at the back sea water of Island City Construction Project.|
|92.||Advance in Technology and Assignment of Nature Friendly River Management.|
|93.||The Landscape and Hydraulic Model Experiment at the Special Emergenｃy Project for Serious Disaster in the Sendai River.|
|94.||Relationship ｂetween Landscape of Saga Plain Region and Water Managemt.|
|95.||Yukihiro Shimatani, The viewpoint expected in the Society of Ecology and Civil Engineering. Ecol. Civil Eng. 10(1), 59-62, 2007, Ecology and Civil Engineering, 10.3825/ece.10.59, 10, 1, 59-62, 2007.01, Although development of national land was started from introduction of rice cropping, over 2000 years ago, in Japan, biodiversity had not been threatened by human impacts until Edo period. But modern science and technology, modern water management and quick economic growth have been depriving biodiversity. Ecology and civil engineering society was born as applied science aimed at changing national land from development type into natural symbiosis type 10 years ago. Four next viewpoints are important for future development of the society. 1. How incorporate human impacts in natural structure and ecosystem modeling. 2. How handle scientific universality and environmental severalty as study. 3. How deal with a social problem in this society. 4. How deal with global environment problem in this society..|
|96.||Field surveys of effects of the maintenance flow discharge change on river environment in the Ohyama River.|
|97.||Characteristics of flow regime of 10 rivers in Kyusyu island.|
|98.||Longtitudial distribution of sediment composition in the Kita River.|
|99.||Review of Research on Ecological Engineering in JSCE.|
|100.||Nobuhiro Suzuki, Takaaki Uda, Yukihiro Shimatani, Takayuki Miyamoto, Kouji Otsuka, Kazushi Kobayashi, Chizuko Kusakabe, Kenichi Kato, Yoshiyuki Hirayama, Takahiro Kazama, Kazuo Yamamoto, Evaluation of Rehabilitation of Tidal Flat System at the Ibi River Mouth. Ecol. Civil Eng. 5 (2), 241-255, 2003, Ecology and Civil Engineering, 10.3825/ece.5.241, 5, 2, 241-255, 2003.01, Wide-spread ebb tidal flat has been lost around the river mouth area of the Kiso, Nagara and Ibi Rivers due to the ground subsidence in the Nobi Plains since 1965. Recovery of ebb tidal flat once lost to create the waterfront with a variety of lives without hindrance in river rehabilitation can contribute rehabilitation of river environment. To this purpose, beach nourishment by using sand dredged from the river channel was planned and carried out in front of the river revetment in the regions separated by groins. As a result, the intertidal zone with much biodiversity between mean tide level and mean low water level was widened due to the action of wind waves. Stable beach was formed by the construction of groins and river environment with a variety of lives was recovered corresponding to the distribution of well-sorted bed materials and water depth of the intertidal zone..|
|101.||Yukihiro Shimatani, Restoration of river channel morphology at the Nagata Area in the Tama River. Ecol. Civil Eng. 5(2), 233-240, 2003, Ecology and Civil Engineering, 10.3825/ece.5.233, 5, 2, 233-240, 2003.01, The Keihin River Works Office, the Tama River Ecological Research Group and citizen groups have planed an interesting river restoration project at the Nagata Area in the Tama River. Although the big gravel bar was seen 20 years ago in the Tama River, it is covered with the forest today. Some specific species depending on gravel bars have been endangered. Therefore, restoration project started in the Tama River in 2001. Some woods were cut, a part of riverbed was excavated and gravel bar was restored. Now, it is under verification about its effect. The argument piled up repeatedly about the restoration method. Here, the process of the argument and restoration methods are described and discussed..|
|102.||Yukihiro Shimatani, What is a healthy ecosystem? for its evaluation and restoration. Ecol. Civil Eng. 4(1), 19-25, 2001, Ecology and Civil Engineering, 10.3825/ece.4.19, 4, 1, 19-25, 2001.01, In this report, I discussed what a healthy ecosystem means from my own experience. I think that ecosystem health is determined by the conditions under which “the organisms that should be found in that ecosystem can properly survive”. Then, what sorts of species, species assemblages, local populations and individuals are those “that should be found there”? Does “properly survive” mean that the standing crop is bigger than certain size? Can they complete the life cycle? Don't they become extinct in the course of natural fluctuations in abundance? in order to answer those questions, we should consider with historical changes of the natural environment and interactions between people and water environments. It is clear that evaluation and restoration of “healthy ecosystem” should be based on mutual relationships between nature and human beings..|
|103.||Masatoshi Denda, Yukihiro Shimatani, Takashi Ozawa, Toshitaka Iwamoto, Jyuzou Kukita, The Development and application of Multitelemetry system for monitoring wildlife, Japanese Journal of Ecology, 51, 3, 215-222, 2001.|
|104.||Masatoshi Denda, Yuichi Kayaba, Yukihiro Shimatani, A method to estimate flooding frequency of backwaters in the Chikuma River, Nagano central Japan. Ecol. Civil Eng. 2(1), 63-72, 1999, Ecology and Civil Engineering, 10.3825/ece.2.63, 2, 1, 63-72, 1999.01, Backwaters in rivers are important habitats for plants and animals. The flooding frequency on backwaters is an important parameter to define the character of the waters. However, methods for estimation of the flooding frequency have not been developed. In this paper we proposed a practical method to estimate flooding frequency of backwaters with an example studied in the Chikuma River. Flooding frequency of the backwaters in the Chikuma River was estimated based on the map with contour lines at every 0.25 m. Assuming the water elevation rise to 0.25 m, 0.5 m, the water was estimated to run into the backwaters through the lower part of river terrace. When the water elevation rise to 0.75 m, flooding situation changed drastically. The flooding stream was estimated to occur on the river terrace and many backwaters was inundated. The important point was that flooding frequency at the backwater was not dependent on the backwater elevation..|
|105.||Yukihiro Shimatani, Human impacts toward river environment and restoration goal for river management. Ecol. Civil Eng. 2(1), 47-50, 1999, Ecology and Civil Engineering, 10.3825/ece.2.47, 2, 1, 47-50, 1999.01, In this paper, 7 factors of river ecosystem are categorized from the view point of human impacts referring to Karr et al. (1986). The factors are 1) energy sauce; 2) water quality; 3) habitat quality; 4) flow regime; 5) sediment transport; 6) biotic interaction; and 7) human use. Based on the review of targets of conservation and restoration of river environment, I proposed that the target of river restoration is to restore the equilibrium dynamic system to keep the function of habitat quality..|
|106.||K. Nakamura, M. Tsukidate, Yukihiro Shimatani, Characteristic of ecosystem of an artificial vegetated floating island, Proceedings of the 1997 1st International Conference on Ecosystems and Sustainable Development Advances in Ecological Sciences, 1, 171-181, 1998.01, The Artificial Floating Island (AFI) was constructed near Tsuchiura Port on Lake Kasumigaura. It measures 92 m long by 9.5 m wide, consisting of 40 smaller segments. Initially, six aquatic plants were vegetated on this structure. After three years, an abundant Common Reed community was established, producing a standing crop of 4,047 kg dry weight for the whole AFI. The AFI also attracted fish and other aquatic animals, including aquatic insects that were more numerous than in control areas. Although the number of species of terrestrial insects was almost the same in all waterside stations, its population in the AFI was smaller than those in other control stations, especially since ground surface insects could hardly be found due to the surface condition of no soil..|
|107.||Keigo Nakamura, Yukihiro Shimatani, A basic study on comprehensive water indices using glass fiber filters and a spectrophotometer, Proceedings of the 1996 18th Biennial Conference of the International Association on Water Quality. Part 4 Water Science and Technology, 10.1016/S0273-1223(96)00740-8, 34, 7-8 -8 pt 4, 163-168, 1996.12, Chemical and biotic indices of water quality have some problems. They need a lot of time to measure and technology, therefore we considered evaluating water color objectively and quantitatively. This method is as follows; after filtering sampling water on the glass fiber filter, absorbance spectrum of this filter is measured by the spectrophotometer. This method does not need, technology and cost. We surveyed the relation between absorbance spectrum and conventional water indices. As a result, this method is very effective to evaluate water quality change from the water color point of view abd it can also evaluate turbidity and Chlorophyll-a very easily. We expect this method to lead to a new water quality index..|