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-  2006 

黄河源区基流估算

DOI: 10.11821/yj2006040012

Keywords: 加里宁法,基流,滤波法,敏感性分析,黄河源区,最小二乘法

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Abstract:

摘要: 河川基流在水安全、粮食安全、非点源污染评价、水资源评价和调查、水资源配置、工农业供水和降雨-径流关系模拟中有着重要的应用。黄河源区(唐乃亥水文站以上区域)的产水量占黄河流域的35%以上,是黄河流域的重要产水区,对黄河源区基流的估算就显得尤为重要。根据研究区域的气候特征,对加里宁法在本区域的应用提出了改进,并提出了新的计算程序。在此基础上,和电子滤波法进行了对比分析。结果表明,电子滤波法非常敏感,滤波参数β控制了基流在总径流中的比例,β与基流成负相关关系,对于不同的来水年份,其敏感性分析图形的形态都很相似;改进的加里宁法基流划分过程强烈地依赖于日过程线的起伏情况,基流一般随着退水系数的增加而增大,加里宁法分割的基流对于参数的变化并不敏感。

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