窟野河流域实测水沙量锐减原因分析

Analysis on the Causes of Sharp Reduction of Observed Silt and Discharge of the Kuye River Basin

根据窟野河流域40多年降水、径流和泥沙等资料进行的分析,认为该流域近年来实测水沙量锐减的原因主要包括:①雨强明显减小;②生态蓄水能力增强;③煤矿开采后形成的塌陷区出现裂缝渗漏;④河道采沙形成的沙坑需要大量的填洼水;⑤城市绿化用水和橡胶坝蓄水。

In terms of the data analysis of more than 40 years of the rainfall,runoff and silt,the main causes of sharp reduction of observed silt and discharge could be summarized as the following five points,i.e.a） Rainfall intensity decreased evidently.b） Ecological storage capacity of water increased.c） The cracks leakage in the subsidence area which was formed by coal mining.d） The bunker caused by collecting sand in the riverbed need a lot of filling water.e） Urban greening water use and rubber dam water storage.