An optimal procedure for identifying parameter structure and application to a confined aquifer
Resource
Environmental Geology 47 (8): 1062-1071
Journal
Environmental Geology
Journal Volume
47
Journal Issue
8
Pages
1062-1071
Date Issued
2005
Author(s)
Tan, C.-C.
Abstract
This study applies an optimal procedure to identify the spatial distribution of groundwater hydraulic conductivity for a confined aquifer in north Taiwan. The parameter structure is determined by the number of zones, zonation pattern, and an uniform hydraulic conductivity associated with each zone. The proposed optimal procedure uses the Voronoi diagram in describing zonation and applies simulated annealing algorithm to optimize its pattern and associated hydraulic conductivity. Three criteria are defined to stop the searching process, including the residual error, the parameter uncertainty, and the structure error. Observation hydraulic heads in years 2000 and 2001 and hydraulic conductivity value from pumping tests are used. The results show that the parameter structure with five zones conforms to the three criteria and, thus, is recommended for future groundwater simulation for the study site. Different heuristic algorithms may also play the role of simulated annealing to optimize the parameter structure. However, which optimization algorithm is more efficient is not discussed and requires further study. © Springer-Verlag 2005.
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Type
journal article
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