2010 Fiscal Year Final Research Report
Transition of hydraulic and sedimentary conditions in a river estuary under seasonal flow variations
| Project/Area Number |
20360217
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Hydraulic engineering
|
|---|
| Research Institution | Tokyo Institute of Technology |
|---|
Principal Investigator |
ISHIKAWA Tadaharu Tokyo Institute of Technology, 大学院・総合理工学研究科, 教授 (50159696)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Keywords | 河川感潮域 / 水環境 / 塩水楔 / 河床材料 / 現地観測 / 航空写真解析 / 数値計算 |
|---|
| Research Abstract |
In an estuarine reach of a river, hydraulic condition changes largely in flood term and normal flow term, the flow characteristics of which have been discussed separately. Considering continuity of the two conditions, the phenomena listed below were studied quantitatively in the Tone River Estuary by field experiments, sediment analysis, aerial photo analysis and numerical simulation ; (1) dynamic motion of saline wedge in a transitional condition between flood flow and normal flow ; (2) variation of bed sediment characteristics through flood season and low water season ; (3) scouring of fine bed sediment during a flood and their returning under saline wedge intrusion.
|
