摘要
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。
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 1980 to 2008 to research.The results show that incoming runoff hydrological series of AGZ,GN,HBZ reservoir from 1980 to 2008 has 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.
出处
《水资源与水工程学报》
2012年第6期188-192,共5页
Journal of Water Resources and Water Engineering
关键词
降雨径流
一致性分析
差异分析
下垫面
rainfall runoff
consistency analysis
analysis of difference
underlying surface
