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本文介绍了用Galerkin法推导的二维地下水运动有限元方程和溶质运移有限元方程。在此基础上编制了通用计算程序,可用以计算各种边界条件下潜水和承压水水位、等水位线、流线、溶质浓度、浓度等值线及在忽略扩散项时咸淡水界面到达时间等。用数值法对明沟排水和田面保持淹灌水层情况下,冲洗种稻改良盐碱地的效果进行了分析计算,并与现有解析解和实验资料进行了对照。
In this paper, the two-dimensional groundwater motion finite element equation and solute transport finite element equation derived by the Galerkin method are introduced. On this basis, a general calculation program has been developed, which can be used to calculate the submerged and confined water level, contour line, streamline, solute concentration and concentration contours under various boundary conditions and the time of arrival of brackish water interface Wait. The numerical method was used to analyze and calculate the effect of flushing paddy soils to improve saline land under the conditions of ditch drainage and surface watering.