摘要
本文在实际供水水源地水文地质勘察水资源评价计算中,摸索并编制了地下水不稳定井流的第一类越流含水层系统定流量井函数近似求解程序,具有一定的使用价值。第一类越流含水层系统定流量井函数是一个复杂的无穷积分函数,一般难以求得其精确解,其实在实际计算结果中不必要很高的精度。利用有限的等对数间距梯形分割近似求解积分值即井函数,适合井函数本身特征的求解,截取的误差在分割求积中得到补偿,精度完全可满足水文地质实际计算需要。程序简单易行,求解速度快,失去微小误差却换来了高效率。程序适用一般微机计算。
Based on the experience of groundwater resource evaluation, the authors draw up a program to solve an approximate solution of type I leaky aquifer well function with steady flow. For the function is a quite complicated function of infinite integral, generally it is difficult to get an accurate solution. In fact,there is not necessary to have such an accurate solution normally. It is suitable for well function to use division of finite-equal - logarithm span to approach an approximate answer. Its permissible error can meet the requirement of ground water estimation. Otherwise, the program is very simple, runs fast, and it is suitable to microcomputers.
