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在地下水数值模拟过程中,由于介质的空间变异性,水文地质参数的最优分区至今仍是一个重要而又难以解决的问题。本文将非饱和带土壤中的优势流概念推广到岩溶裂隙介质中,系统地分析了形成优势流的优势结构面控水机理,结合中国北方岩溶特征提出了实际工作中优势参数分区方法,并依据有限元方法进一步求解。实例计算表明:利用优势面分析方法可以确定参数最优分区,所计算结果与实际情况基本一致。该结论对地下水流数值模拟参数的识别提供一种新的途径,同时对中国北方岩溶区地下水优势流的研究以及地下水资源的科学评价等具有重要的参考价值。
In the numerical simulation of groundwater, the optimal partition of hydrogeological parameters is still an important and difficult problem to solve so far due to the spatial variability of the medium. In this paper, the concept of dominant flow in soil in unsaturated zone is extended to karst fracture medium. The mechanism of dominant structure surface water control for forming dominant flow is systematically analyzed. Based on the karst features in northern China, the method of zoning of dominant parameters in practical work is proposed. Finite element method to solve further. The example calculation shows that the optimal partitioning of parameters can be determined by the dominance analysis method. The calculated results are in good agreement with the actual situation. This conclusion provides a new way for the identification of groundwater flow numerical simulation parameters. At the same time, it has an important reference value for the study on the dominant flow of groundwater and the scientific evaluation of groundwater resources in the karst area of northern China.