抄録
Topographic changes of the river mouth bar and terrace of the Sagami River were investigated through field observations and numerical analysis of waves and nearshore currents. The river mouth bar of the Sagami River has retreated and deformed largely, resulting in the sand deposition to the navigation channel of Hiratsuka fishing port. In order to improve this condition, fundamental mechanism of sand movement around the terrace off the mouth was investigated. Sand deposition into the navigation channel was accelerated by the longshore sand transport along the marginal line of the terrace.
