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确定含水层参数是建立含水层模拟模型工作中最困难的问題之一。近年来开始采用大面积长期地下水动态观测资料反求含水层参数。起初,广泛采用试算法,但由于缺乏一种收敛的逐次修正参数的方法,往往费了大量机时也不一定能得到令人满意的结果。而用常规的线性代数方法反求参数,由于反求问题的不适定性,会使水位观测上的少量误差,引起所求得的参数的大幅度跳动,甚至出现大量不应有的负参数。
Determining aquifer parameters is one of the most difficult issues in establishing aquifer simulation models. In recent years, a large area of long-term groundwater dynamic observations began to reverse the aquifer parameters. Initially, the trial method was widely used, but due to the lack of a convergent, successive correction parameter approach, it was not always possible to obtain satisfactory results with a large number of machines. However, with the conventional linear algebra method, the parameter is inversely determined. Due to the ill-posedness of the inverse problem, a small amount of error in the observed water level results in a large jump in the obtained parameters and even a large number of negative parameters that should not be found.