采用数字滤波法对黄崩溜沟3个不同尺度流域1995-2007年日径流量进行了基流分割,结果表明:本区基流所占比重较大,黄崩溜沟、观景台沟、马道沟水文站多年平均基流指数分别为0.539、0.721、0.552。基流量受降雨量、降雨历时、雨型、雨强、下垫面条件的共同影响,下垫面条件的不同是决定该区不同流域基流指数差异的关键因素。地表水及地下水中化学元素含量与基流指数大小的一致性及其相关性分析证实了该区基流量主要来自地下水。其相关分析也为基流估算提供了新的思路。

 By using the digital filter method,base flow separation is carried out based on the daily runoff data from 1995 to 2007.Results show that the proportion of base flow is great in this area,the annual average base flow indice of Huangbengliu Gully Station,Guangjingtai Gully Station,Madaogou Station are 0.539,0.721,0.552 respectively.Base flow is affected by the comprehensive influence of rainfall capacity,rainfall duration,rainfall style,rainfall intensity.The difference of underlying surface condition is the key factor influencing the base flow index in different basins.The consistency of element contents in surface flow and groundwater and base flow index and its correlation analysis prove that the base flow in this area comes mainly from groundwater.