基于逐个修正法的含水层参数反演

含水层参数的确定,是进行地下水资源科学管理的基础和关键。针对含水层参数反演解往往不唯一的问题,提出采用最优化方法中的逐个修正法,将反问题转化为一系列的正问题进行求解;利用正问题的解是适定的这一性质,克服了反问题不适定问题;最后以无界承压含水层井流模型为例,讨论了逐个修正法在含水层参数反演中的应用,实例分析结果表明,此种方法有很好的稳定性,是一种值得在实际中推广应用的含水层参数反演方法。

Identifying aquifer parameters based on the algorithm of modifying parameters one by one

Identification of aquifer parameters plays a primary and pivotal role in ensuring proper management of groundwater resources.Due to no unique solution of identifying the aquifer parameters frequently that will be proposed making use of the modifying parameters one by one,the inverse problem has been researched by means of changing the inverse problem into a set of the forward problem,the ill-posedness of the inverse problem has been overcome by applying for the property that the forward problem is posed,and finally with the well flow model of unbounded confined aquifer as an example,the application of algorithm which modifying parameters one by one in the aquifer parameters inversion is discussed.Application of this method to the practical example shows that algorithm can be well used in modifying aquifer parameters,and the computational results testify that the method has very strong stability.This indicates that algorithm has good application foreground in the optimization problem in water science.