基于电导率质量平衡法的基流分割方法研究

Study on base flow separation method based on conductivity mass balance method

本研究通过综合运用电导率质量平衡法(CMB)、数字滤波法、ECK滤波法、HYSEP法以及BFI法对科罗拉多河流域的典型水文站点进行基流分割计算,并根据电导率质量平衡法的结果对其他的基流分割方法进行参数修正。结果表明:(1)以CMB法为标准,ECK滤波法和数字滤波法的结果比HYSEP法以及BFI法更为准确;(2)根据CMB法对其他方法进行参数修正,2个水文站修正后结果准确性分别提高了5%~40%和10%~50%;(3)综合评定最适合科罗拉多河流域的基流分割方法是经过CMB法参数修正后的ECK滤波法,2个水文站经过修正后的ECK法相较于CMB法结果的误差百分比分别为1.836%和2.506%。

This study comprehensively applied the conductivity mass balance method(CMB),digital filtering method,ECK filtering method,HYSEP method,and BFI method to perform base flow separation calculation on typical hydrological stations in the Colorado River Basin.Based on the results of the conductivity mass balance method,other basic flow separation methods were parameter corrected.The results showed that:①using CMB method as the standard,the results of ECK filtering method and digital filtering method were more accurate than HYSEP method and BFI method;②according to the CMB method,parameter modifications were made to other methods.The accuracy of the results obtained by the two hydrological station modified methods compared to the empirical method was improved by 5%~40%and 10%~50%respectively;③the most suitable base flow separation method for the Colorado watershed was the ECK filtering method after parameter modification by the CMB method.The error percentages of the two hydrological station modified ECK methods compared to the CMB method results were 1.836%and 2.506%respectively.