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RIVER MOUTH SANDBAR AND BED VARIATION ANALYSIS DURING LARGE FLOOD: JULY 2011 FLOOD IN THE AGANO RIVER

2013; Volume: 69; Issue: 4 Linguagem: Inglês

10.2208/jscejhe.69.i_1009

2185-467X

Masaki TATEYAMA, Tatsuhiko UCHIDA, Shoji FUKUOKA, Nariyuki TANABE,

Earthquake and Tsunami Effects

In the Agano River estuary flowing into Japan Sea, bars at the mouth are developed from both river banks. The bar causes the river discharge capacity to decrease and the water level to rise. Therefore, it is important to understand mechanism of river mouth bar flushing during a flood event. One of the authors has shown that flow and bed variation during a flood event may be explained by means of a suitable numerical analysis method using temporal changes in observed water surface profiles effected by various events in the river. The objective of this paper is to clarify flushing at river mouth bar during a large flood by temporal observed water surface profiles and the numerical analysis.