| 1. |
Reproducibility of Numerical Experiments for Environmental Assessment of the Coastal Ocean : Tidal Currents. |
| 2. |
High-resolution unstructured grid model was developed using DREAMS_Dash (DR_D) as open boundary conditions based on FVCOM (Chen et al., 2003) to reproduce and predict sea state fluctuations in coastal waters with complex coastal and seafloor topography. UCHI (Unstructured-grid Coastal model with High-resolution Information) was developed. This year, we introduced a rainfall runoff inundation analysis model (RRI model, Sayama et al., 2012) into the UCHI model, and examined it for highly accurate reproduction of the physical environment of the inner bay with complex topography. As a result, the introduction of RRI has made it possible to accurately evaluate the inflow of rivers, confirming the improvement in the reproducibility of the physical environment of the coastal waters.. |
| 3. |
Numerical simulation was conducted to estimate potential sources of pen shell Atrina spp. larvae using finite volume community ocean model FVCOM with particle tracking. To reproduce the hydrographic field around sea channels between Ariake Sea and Yatsushiro Sea, a potential site of larvae source, present simulation newly incorporated Yatsushiro Sea and the sea channels into the calculation domain using fine unstructured triangular mesh and evaluated the validity of the numerical simulation by comparison with observed data. Comparison results between cases with Yatsushiro Sea and without it revealed that the incorporation of Yatsushiro Sea and the sea channels reproduced the hydrographic field in Ariake Sea more accurately than previous modelling results in terms of tidal current and density field, resulting in change of residual current. Based on the reproduced hydrographic field, passive particles were released just above the seabed over the whole Ariake Sea in 2008 to 2010. Large number of particles released from western area of Ariake Sea head reached the settling area of juvenils in 2008 and 2010. In addition, sea areas off Arao city to Kumamoto city in Kumamoto pre. were considered to be an effective site of larvae source to the head area where juveniles were frequently settled.. |
| 4. |
Particle tracking model to estimate path of fan-mussel larvae in Ariake Sea taking into consideration advection and diffusion effects on the larva transportation based on three dimensional hydrodynamic model was developed. Larvae were released from the bottom in southern area and at the head of Ariake Sea. Larvae from the southern area were transported toward both the head due to the estuarine circulation and out of the sea. Some larvae released from the sea head were transported toward the mouth and other remained at the sea head.. |
| 5. |
ON REPRODUCTION OF HYPOXIA FORMATION IN ARIAKE SEA BY ECOHYDRODYANAMIC MODEL. |
| 6. |
FLOW AND ITS TEMPORAL CHANGE IN THE INNER AREA OF THE ARIAKE SEA. |
