河北4座水库降雨径流一致性分析

降雨径流关系是否发生变化,即不同时期降雨径流关系有无显著差异是水文演算中迫切需要解决的问题.以河北省海河流域四座水库的降雨径流系列为基础,通过降雨径流双累积曲线的特性分析、年径流系数的变化过程分析、秩和检验、回归方程的差异分析等,对四座水库的1980-2008年入库径流水文系列一致性进行研究.结果表明:AGZ水库、GN水库、HBZ水库1980-2008年的入库径流资料具有一致性,虽年径流深、年径流系数有差异,但降雨径流关系并无显著差异.而WK水库1980-2008年的入库径流资料则不具有一致性,降雨径流机制发生变化,分析了下垫面变化的影响,并对其天然径流资料进行修正.

Consistency analysis of rainfall runoff in four reservoirs in Hebei Province

Whether the rainfall runoff mechanism has significant difference in different stages is an urgent problem to be solved in practice. In this paper, the consistency of rainfall-runoff series is analysed concerning the hydrologic data of four reservoirs in Hebei Province, Haihe river basin as the foundation. Through the double mass curve of rainfall- runoff relation, the change process of annual runoff coefficient and the rank sum test method, the paper selected incoming runoff hydrological series consistency of the four reservoirs from 1980to 2008to research. The results show that incoming runoff hydrological series of AGZ, GN,HBZ reservoir from 1980to 2008has consistency, though the annual runoff, runoff coefficient were different, but the relation of rainfall and runoff has no significant differences. WK reservoir incoming runoff hydrological series are inconsistent, Rainfall runoff mechanism has changed. It is necessary to analyze the underlying surface change and modify natural runoff data.