地下水溶质运移解析法的近似求解  

Approximate Solution of Groundwater Solute Transport Analytical Method

作　　者：赵珍伟[1] 

机构地区：[1]中国辐射防护研究院,山西太原030006

出　　处：《人民黄河》2017年第12期77-79,84,共4页Yellow River

摘　　要：地下水溶质运移解析法是地下水环境影响评价中常采用的一种预测方法。对于实际地下水环境影响评价工作而言,手工查表插值计算显得非常困难,计算机编程语言为解决这一问题提供了方便。以应用最广泛的一维稳定流动二维水动力弥散问题中的连续注入示踪剂-平面连续点源计算公式为例,借助IDL编程语言实现计算公式中第一类越流系统井函数以及第二类零阶修正贝塞尔函数的近似求解,并通过坐标系旋转变换得到与地下水流动方向相一致的污染物浓度值。结果表明:IDL语言结合Surfer软件可以实现地下水溶质运移方程解析解的快速、连续、稳定求解和求解结果的可视化,且所得解析解误差小、精度高,污染物运移方向满足地下水环境影响评价中实际预测的要求。Groundwater solute transport analytical method is a forecasting method often used in groundwater environmental impact assessment. For practical purposes, manual lookup table and interpolation calculation is very difficult. Computer programming language provides a convenient solution to this problem for us. Taking the forynula of continuous injection tracer-flat continuous point source of a one-dimensional steady flow and two-dimensional hydrodynamic dispersion issue as an example, with IDL （Interactive Data Language） programming language, type Ⅰ leaky aquifer well function and type Ⅱzero order modified Bessel function could be approximated to solve,and contaminant transport direc-tion which was consistent with the direction of groundw-ater flow could be achieved by coordinate rotation transforym. The result shows that the analytical solutions of the equations of solute transport in groundwater can be solved and visualization and with IDL programming language and surfer software,and small resulting error,high precision and contaminant transport direction are satisfied with prediction of groundwater envi-ronmental impact assessment.

关 键 词：IDL 坐标系旋转 解析法 溶质运移 地下水 

分 类 号：P641.69[天文地球—地质矿产勘探]