地下水流数值模拟中抽水井水位的校正  

Emendation of drawdown in pumping wells for numerical modeling of groundwater flow

作　　者：陈崇希[1] 王旭升[2] 胡立堂[3] 

机构地区：[1]中国地质大学环境地质研究所,湖北武汉430074 [2]中国地质大学水资源与环境学院,北京100083 [3]北京师范大学水科学研究院,北京100875

出　　处：《水利学报》2007年第4期481-485,共5页Journal of Hydraulic Engineering

基　　金：国家自然科学基金项目(40542011)

摘　　要：总结了已有的抽水井水位校正方法后，通过引入不稳定井流解析解，提出了基于矩形网格和不规则多边形网格二维有限差分模型的井中水位校正公式。采用该公式分别对小尺度模型和大尺度模型进行分析，计算结果表明，常规数值法得到的井中水位降深明显偏小，甚至只有实际井中水位降深的1／3～1／4，而经本文公式校正后得到的井中水位则与实际水位接近，相对误差较小，具有较高精度。A formula for emendation of drawdown in pumping wells for analysis of 2-D finite difference method with rectangular grid or unstructured polygon grid is proposed by introducing the approximate analytical solutions of unsteady well flow suggested by Theis. The formula is applied to the calculations both for small scale model and large scale model. It is found that the drawdown calculated by means of conventional numerical method is underestimated by 2/3 to 3/4 of the actual value, and the revised drawdown obtained from the proposed method is approximately equal to the analytical solution.

关 键 词：地下水 数值法 水位降深 抽水井 校正模型 

分 类 号：P641.2[天文地球—地质矿产勘探]