磨刀门水道近50年河床演变及其冲淤成因分析

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。

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

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 deformation 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 provide a scientific basis for river management and development in the future.