飞来峡水利枢纽运行对北江河道演变的影响分析

按列维输沙率公式估算，北江横石站推移质年产沙量46万t，飞来峡水库运行将会导致部分推移质泥沙淤积在库内，但总量不大。根据估算推移质沙量来看，近十多年来北江下游河道采沙量偏多，河道采沙要参考河流产沙量有计划地开采。

Analyses on the effect of the Feilaixia hydraulic project operationon the river bed evolution of Beijiang River

According to the formula for transport rate of bed load, the estimating amount of annual bed load at Hengshi hydrologic station in Beijiang river is about 460 thousand tons. The operation of Feilaixia reservoir bring some sedimentation along the backwater, but not serious. Comparing with the incoming bed load, it is excessive to excavate sand from downstream bed of Beijiang river.Therefore it is necessary to make a guideline for sand excavating with consideration of the amount of incoming bed load.