河川感潮域に設置された水制群周辺の流れと物質輸送について

抄録

In the Kikuchi River, which is located in the northern part of Kumamoto prefecture, sediment deposition at the estuary has become a serious social problem in recent years. In this study, in order to grasp the present situation of sediment transport around spur dikes at bend in the Kikuchi River estuary, the flow velocity was measured along the water-route and across the river by Acoustic Doppler Current Profiler (ADCP) in the period of spring tide. Furthermore, automatic water sampler was placed on the river side to extract suspended solids and nutrient salts from the stream water.

The results showed that flow velocity was transversely uniformed at flood tide. Furthermore, the transport of the suspended solids was activated in the period of the strongest flood current.