大规模采砂后富春江富阳河段河床演变分析

Fluvial Process of Fuyang Reach of Fuchun River after Exploiting Sand in A Large Scale

根据钱塘江富春江富阳河段近 1 0年的采砂情况和近 30年的河道实测资料分析 ,发现大规模和无序采砂使得河床严重变形 ,纵剖面形成过度下凹型形态 ,影响到河势稳定。另一方面 ,大规模采砂扩大了河道过水面积 。

Based on analysis about the situation of exploiting sand in recent ten years and the field data of river topography in recent thirty years in Fuyang reach of Fuchun River,the authors find that massive and irregular exploiting sand from the river bed has caused new problems.For example,the river longitudinal profile is tending to be excessive concave shape,and the stability of river configuration is affected as well.On the other hand,exploiting sand in a large scale resulted in enlarging the river cross-section,lowering the flood level.