用抽水资料推求取水半径的试算法  

The Trial Calculating Method of Radius of Influence in Isolated-well Discharge Formulas Using Pumping Data

作　　者：刘元会[1] 常安定[1] 

机构地区：[1]长安大学理学院,西安710064

出　　处：《灌溉排水学报》2008年第2期74-76,85,共4页Journal of Irrigation and Drainage

基　　金：陕西省自然科学基础研究计划项目(2006D25);长安大学科技发展基金项目(0305-1001)

摘　　要：分析了无上、下补给,井内定水位且初始水位呈水平时,均质含水层中的割离井渗流模型的出水量公式,引进了仅与相对井径(抽水井半径与取水半径之比)有关的函数,称其为割离井法的井流函数;对出水量公式进行数学变换,找到一条不含水文地质参数、仅与相对井径有关的理论曲线,该理论曲线也可由抽水资料获得。在该曲线上取2点,得到含有相对井径和另一参数的2个方程组,分析方程组的性质,采用试算法求解得到取水半径的值,最后用实例进行验证。By analyzing and simplifying the isolated-well discharge formulas with the water level in the well fixed and the homogeneous isotropic aquifer having no recharge from up and down, the theory curves have been inducted, which are only related with the relative diameter of the well, which have been called well flow-functions. The theory curves have been found which are only related with the relative diameter of the well and not comprise the hydrogeology parameters are taken on pumping data, by conducting mathematical manipulation to the isolated-well discharge formulas. Two equations of only comprising the relative diameter of the well and a another parameter are chalked up. By analyzing their property, radius of influence is taken. In the end, being verified by examples, the results is resemble with these of the other methods.

关 键 词：割离井法 流量公式 取水半径 试算法 

分 类 号：P641.7[天文地球—地质矿产勘探]