Development of a Two-Layered Groundwater Model for the Taipei Basin

by Nien-Sheng Hsu, Natl Taiwan Univ, Taipei, Taiwan,
Ming-Jame Horng, Natl Taiwan Univ, Taipei, Taiwan,
Chian Min Wu, Natl Taiwan Univ, Taipei, Taiwan,
William W. -G. Yeh, Natl Taiwan Univ, Taipei, Taiwan,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract: The objective of this paper is to develop a groundwater model for flow simulation in the Taipei basin. A conceptual model of the basin is first developed; the model consists of an upper and a lower aquifer, separated by an aquitard which permits vertical leakage between the two layers. The governing equations for the two-layered system are derived. The Galerkin finite element method is then used to discretize the flow domain, and the governing equations can be formulated as a set of algebraic equations. The discretized flow domain consists of 287 nodes and 276 elements. The successive over-relaxation (SOR) iterative scheme is then used to solve the set of algebraic equations. The final step of the model's development is to verify the model with field data. After using a systematic trial-and-error procedure for parameter estimation, the comparison between the computed and measured head values at 16 observation wells shows an acceptable match.

Subject Headings: Hydrologic models | Basins | Finite element method | Layered soils | Groundwater | Mathematical models | Groundwater flow | Data processing | Aquifers | Flow simulation | Taiwan | Taipei | Asia

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