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利用不同的方法对贡嘎山黄崩溜沟水文站实测日径流资料进行了基流分割,并利用数理统计方法对基流指数的均值、均方差、变异系数进行了计算,并对黄崩溜沟基流过程和地表径流、基流的滞后时间进行了分析。黄崩溜沟基流分割指数为0.65~0.74,平均值为0.71;枯水期,黄崩溜沟地表径流量相对降雨量滞后时间为2.7~14.5d,平均滞后8d,基流量相对地表径流滞后0.7~3d,平均滞后1.8d;丰水期,黄崩溜沟地表径流量相对降雨量滞后时间为0.7~3.7d,平均滞后1.8d,基流量相对地表径流滞后0.9~2.6d,平均滞后1.5d;考虑流域整体,计算黄崩溜沟流域降雨入渗补给系数为0.16~0.28。研究表明:利用数字滤波法中F4方法对黄崩溜沟径流进行基流分割,其结果的稳定性与可靠性最佳;丰水期黄崩溜沟地表径流量相对降雨量滞后时间明显比枯水期短,而其基流量相对地表径流滞后时间丰水期、枯水期相差不大;对某一流域径流进行基流分割时应选取多种方法,并需要对其分割结果的稳定性与可靠性进行讨论,按照流域计算降雨入渗补给地下水补给问题应考虑流域整体,尤其是在山区。
By using different methods, the daily runoff data of Huangbengchuogou Hydrological Station in Gongga Mountain were divided into several parts and the mean value, mean square error and coefficient of variation of base flow index were calculated by mathematical statistics. Ditch flow process and surface runoff, base flow lag time were analyzed. In the dry season, the relative precipitation lag time of surface runoff of the Huang-a-puchou ditch was 2.7 ~ 14.5 days, with an average lag of 8 days. The relative flow rate of the base flow was 0.7 ~ 3d, average lag 1.8d. During the wet season, the relative rainfall lag time of surface runoff of Huangfan slippery slope was 0.7 ~ 3.7d with an average lag of 1.8d, and the relative lag of base flow was 0.9 ~ 2.6d with an average lag of 1.5d. Considering the whole basin, the recharge coefficient of rainfall infiltration in the Huang-Buchi watershed is calculated to be 0.16 ~ 0.28. The results show that: the F4 method of digital filtering method is applied to the base flow segmentation of runoff in the avalanches, and the results show the best stability and reliability; Short, but its basal flow relative to the surface runoff lag time is not much difference between the wet season and the dry season; a lot of methods should be selected for the base flow segmentation of a certain river basin runoff, and the stability and reliability of the segmentation results need to be discussed , The basin should be considered as a whole, especially in mountainous areas, according to the calculation of rainfall infiltration and groundwater recharge.