Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (6): 1854-1861.doi: 10.13278/j.cnki.jjuese.20180323

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Optimization of Hydrogeological Parameters Based on Ergodic Search Algorithm

Qiu Shuwei1,2,3, Wu Yamin1,2,3, Ke Yuqi1,2,3, Yan Baizhong1,2,3   

  1. 1. School of Water Resources & Environment, Hebei GEO University, Shijiazhuang 050031, China;
    2. Key Laboratory of Sustained Utilization & Development of Water Resources, Hebei Province, Shijiazhuang 050031, China;
    3. Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Hebei Province, Shijiazhuang 050031, China
  • Received:2018-12-09 Published:2020-12-11
  • Supported by:
    Supported by Water Conservancy Science and Technology Planning Project of Hebei Province(2017060),Doctoral Research Fund Project of Hebei GEO University(BQ2017006),Professional Degree Teaching Case Base Construction Project of Hebei Province (KCJSZ2020095) and Institution of Higher Learning Science and Technology Research Project of Hebei Province (ZD2019082)

Abstract: The traditional Theis wiring method cannot use all the pumping test data, the manual wiring efficiency is low, and the parameter calculation is greatly affected by human subjective factors. In order to solve these problems, based on the pumping test data and Theis formula and superposition principle, the maximum value of Nach-Sutcliffe efficiency coefficient of theoretical calculation drawdown and measured drawdown was taken as the objective function. Through Matlab software programming, the hydraulic conductivity coefficient T and water storage coefficient S are traversed within their corresponding ranges by using the ergodic search algorithm, by which the automatic and accurate solution of hydrogeological parameters is realized. The ergodic search algorithm was applied to determine the hydrogeological parameters of two pumping test cases,and the results were compared with those of the traditional methods. The results show that the results obtained by ergodic search algorithm are similar to those obtained by traditional methods,which shows that the ergodic search algorithm is effective and reliable in solving hydrogeological parameters. The values of Nach-Sutcliffe efficiency coefficient of theoretical calculation drawdown and measured drawdown obtained by the ergodic search algorithm for the two pumping test examples are 0.996 5 and 0.970 8 respectively, which are closer to 1.000 0, indicating a better fitting degree compared with the parameter results obtained by the traditional methods.

Key words: optimization solution, hydrogeological parameters, ergodic search algorithm, Theis formula, superposition principle

CLC Number: 

  • P641.1
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