调水调沙对黄河高村段的影响分析

Analysis on Influence of Water and Sediment Regulation of the Yellow River to Gaocun Section

根据高村水文站水文资料,对调水调沙之前和2002—2008年调水调沙期间高村段河道的演变情况及原因进行了对比分析。结果表明:调水调沙改变了导致黄河下游河道严重淤积的不利水沙组合,形成了有利于下游河道减淤的水沙条件;高村段河道在调水调沙期间总体呈冲刷态势,平滩流量增大,河道行洪能力得到了提高。

The paper conducts contrastive analysis on the channel evolution and its reasons of Gaocun section before and during the period of water and sediment regulation of 2002-2008.The outcomes show that a) the water and sediment regulation has changed unfavorable combination of silt and discharge which causes serious sedimentation on the lower Yellow River,forming silt-discharge condition that is favorable to sediment reduction of the lower river;b) the channel of Gaocun section is in the statement of scouring,both bankfull discharge and flood capacity of the channel have been increased during the regulating period.