SIP和PCG2两种迭代法在地下水数值计算中的应用对比

对两种目前最受地下水工作者喜欢的数值迭代法SIP和PCG2做一对比 ,主要分析了这两种方法的原理及其使用效果的差异 ,并结合简单的实例进行验证 ,得出结论 :SIP法在方法本身和人为操作两方面都具有难以避免的不精确 ,而PCG2法则就这两方面而言却是一种行之有效、精确性极高的数值迭代法 ,而且在地下水数值计算领域具有很高的推广价值。

Contrasting the application of the SIP and PCG2 methods for groundwater matrix numerical solution

SIP and PCG2 are the most accepted iterative methods of groundwater matrix solution. The two methods' rational and effects are analyzed, and a series of simulations was performed with SIP and PCG2 methods while adjusting the matrix solution parameters sequentially one at a time. The analysis and simulation results show that an accurate result would be made with PCG2, but an inaccurate result would be made with SIP. A conclusion is made that PCG2 is the most effective and most accurate iterative method, and the method would be popularized in the field of groundwater matrix numerical solution.