磨刀门水道近50年河床演变及其冲淤成因分析

Evolution and causes of the Modaomen River during the Last 50 Years

为弄清磨刀门水道河床演变及其冲淤成因,利用历年实测地形资料,建立DEM模型,进行河床演变分析,结果表明:磨刀门水道主槽不断冲刷,滩地有淤有冲。从上游来水来沙条件、河床边界条件、人类活动等方面进行冲淤成因分析,确定主要影响因素,预测河床演变趋势,为将来河道治理与开发提供科学依据。

Use of historic terrain data, Digital Elevation Model for the evolution of the reach is established. The results indicate that：1 ）Modaomen reach main channel keeps being eroded;2）beaches is general charactered by siltation. In order to clarify the reasons of riverbed deformation, We analyze the reason of the riverbed de- formation from upstream inflow and sediment conditions, riverbed boundary conditions and human activities, etc. we determine the main influence factors and forecast riverbed evolution trend. The research results pro- vide a scientific basis for river management and development in the future.