北江下游枯水河床下切与水位下降分析

Downcutting of Low Water Riverbed and Lowering of Water Level at Downstream Beijiang River

由于大规模挖沙,北江河床剧烈下切,导致水面线异常变动,两者变化均呈溯源性规律。本文引入水位变化强度参数,建立其沿程变化函数,为北江河床仍在进行的溯源性变化提供借鉴。

In Beijiang River, excessive sand dredging resulted in great downcutting of riverbed and extraordinary variation of water profile, the variation of which both followed the retrogressive law. In this paper, the parameter of water stage variation strength was introduced and its streamwise variation function was established, providing a reference for the retrogressive variation which is still going on in Beijiang riverbed.