| 酉阳河流域典型年汛期的基流分割研究 |
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| 引用本文： | 雷宇宽.酉阳河流域典型年汛期的基流分割研究[J].水文,2021,41(1):35-41. |
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| 作者姓名： | 雷宇宽 |
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| 作者单位： | 酉阳土家族苗族自治县水利局 |
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| 摘 要： | 基流分割是水文学研究中的重难点问题之一,目前基流分割也存在许多方法。基于酉阳河典型年汛期实测日平均流量资料,分别采用Chapman-Maxwell改进方程数字滤波法一次滤波(参数N=1)以及二次滤波(参数N=2)、BFI(f)法、HYSEP固定步长法、HYSEP滑动步长法、HYSEP局部最小值法进行基流分割并对其结果进行分析对比。研究结果表明:不同方法下得到的基流分割线各不相同,各年份基流指数的统计特征也存在一定差异,采用Chapman-Maxwell改进方程数字滤波法二次滤波得到的基流成果更符合基流的一般特征以及酉阳河流域的降水径流关系特点。
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| 关 键 词： | 基流分割 典型年 汛期 数字滤波法 基流指数法 HYSEP法 |
Research on Base Flow Separation at Youyang River Basin in Flood Season of Typical Flow Years |
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| LEI Yukuan.Research on Base Flow Separation at Youyang River Basin in Flood Season of Typical Flow Years[J].Hydrology,2021,41(1):35-41. |
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| Authors: | LEI Yukuan |
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| Institution: | (Youyang Tujia and Miao A utonomous County Water Resources Bureau,Youyang 409899,China) |
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| Abstract: | Base flow separation is one of the most important and difficult problems in hydrological research.At present,there are many methods to solve it.Based on the daily average flow data in the flood season of typical flow years,this paper used 6 meth-ods,including the Chapman-Maxwell Improved Equation Digital Filtering method(filtering once:N=1,filtering twice:N=2),BFI(Base Flow Index)method,Fixed Interval HYSEP(Hydrograph Separation Program)method,Sliding Interval HYSEP method and Local Minimum HYSEP method to separate the base flow.By analyzing their base flow separation lines and statistical characteristic data,the results show that:among the six methods,use the Chapman-Maxwell Improved Equation Digital Filtering method for fil-tering twice is most in line with the base flow general characteristics,and it is the best method to reflect the characteristics of precipitation-runoff relationship in Youyang River basin. |
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| Keywords: | base flow separation typical flow year flood season digital filtering method BFI(Base Flow Index)method HYSEP(Hydrograph Separation Program)method |
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