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为了使Tennant法更适用于计算我国北方季节性河流的生态基流,对其计算方法进行改进,即引入回归分析的思想,用origin软件处理径流系列,对多年同期月径流量进行多次拟合分析,得出最符合其变化趋势的曲线回归方程,以此求出各平水年对应拟合方程的径流量,将该流量平均值的10%作为当月生态基流量,最后根据各月生态基流得出河流生态基流。桃河生态基流计算结果表明,使用回归分析Tennant法计算得出的生态基流占多年平均径流的10.2%,较传统Tennant法更符合桃河径流现状。
In order to make Tennant method more suitable for calculating the ecological base flow of seasonal rivers in northern China, the calculation method is improved, that is, the idea of regression analysis is introduced, the runoff series is processed by origin software, and the monthly runoff of multiple years The regression equation of the curve which is most suitable to the change trend is obtained, and then the runoff of the fitting equation corresponding to each flat water year is obtained. Taking 10% of the average value of the flow as the ecological base flow of the current month, Draw river ecological base flow. The results of eco-basal flow calculation in Taohe River show that the eco-basal flow calculated by regression analysis Tennant method accounts for 10.2% of the average annual runoff, which is more in line with the current situation of Tao River runoff than the traditional Tennant method.