降水入渗补给系数与地层的相关分析与应用

Correlation analysis and application of precipitation infiltration coefficient and stratum area weight

降水入渗补给系数与地层相关分析的目的，是为推求山丘区降水入渗补给量．鲁中山丘区是由各种不同地层出露组成的山丘区域．在多个水文流域基流分割基础上，建立流域年均降水入渗补给系数与各种地层出露面积占流域总面积权重间的最佳回归方程，利用该回归方程和地层分布及降水量推算不同地下水流域的降水入渗补给量．在地下水开发利用不高的山丘区，降水入渗补给量即为地下水补给量．

According to the base flow separation results from hydrographs in many watershed,the best regression equation expressing the relationship between annual precipitation infiltration coefficient and the weight of different strata area to total area of the watershed is established.The equation can be used to calculate the precipitation infiltration recharge for different ground water basins in which the strata distribution and the precipitation are given.The precipitation recharge is equivalent to the ground water recharge in some mountainous area where the exploitation of ground water resources are far from being sufficient.