北江大堤河床下切成因的分析

广东北江大堤河段河床近期来不断下切，改变河势，流态以及分流的比较，威胁大堤安全。要克服这些问题的发生，必须研究河床下切的原因，才能提出有针对性的解决措施，本文运有数理统计方法，对河床变化现状以及输沙平衡原理等方面进行研究。从中找出河床下切的主要原因，为决策单位提供根治床下切的可靠依据。

Analysis of Causes of Riverbed Entrenchment along the North River Grand Dyke

Continuous entrenchment of riverbed along the North River Grand Dyke in recent period has changed the river situation,flow condition and diffluence ratio,thus threatening the Grand Dyke.It is essential to study the causes of riverbed entrenchment,so as to find out correct control measures.In this paper,studies on the status of bed change and the principle of sediment transport equilibrium by using mathematic statistics method to find out the key causes of entrenchment, thus providing a reliable basis for decision_making.