Parameter identification for leaky aquifers using global optimization methods

Hund-Der Yeh*, Yu Chung Lin, Yen Chen Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

In the past, graphical or computer methods were usually employed to determine the aquifer parameters of the observed data obtained from field pumping tests. Since we employed the computer methods to determine the aquifer parameters, an analytical aquifer model was required to estimate the predicted drawdown. Following this, the gradient-type approach was used to solve the nonlinear least-squares equations to obtain the aquifer parameters. This paper proposes a novel approach based on a drawdown model and a global optimization method of simulated annealing (SA) or a genetic algorithm (GA) to determine the best-fit aquifer parameters for leaky aquifer systems. The aquifer parameters obtained from SA and the GA almost agree with those obtained from the extended Kalman filter and gradient-type method. Moreover, all results indicate that the SA and GA are robust and yield consistent results when dealing with the parameter identification problems.

Original languageEnglish
Pages (from-to)862-872
Number of pages11
JournalHydrological Processes
Volume21
Issue number7
DOIs
StatePublished - 30 Mar 2007

Keywords

  • Genetic algorithm
  • Global optimization
  • Groundwater
  • Leaky aquifer
  • Parameter identification
  • Simulated annealing

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