Optimal dewatering of an excavation site

Date

2012-06-01

Author

Demirbas, Korkut
Altan Sakarya, Ayşe Burcu
Önder, Halil

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Optimal dewatering of an excavation area in an unconfined aquifer is studied using a combined optimisation-simulation approach. In combining a groundwater model with an optimisation model, a response matrix approach, generated on the basis of linear superposition, is used. ModMan, which calls Modflow repeatedly to generate a response matrix, is utilised to transform the groundwater management problem into a linear integer programming problem. A hypothetical dewatering area is considered to examine the effects of non-linearity due to pumpage. Two different iterative methods, revised unit rates and revised coefficients, are applied to account for the non-linear response of the unconfined aquifer to pumpage. The study shows that a modified linear optimisation procedure used in conjunction with Modflow provides a useful and computationally efficient tool for the analysis of groundwater dewatering problems in unconfined aquifers.

Subject Keywords

Excavation, Groundwater, Mathematical Modelling

URI

https://hdl.handle.net/11511/48359

Journal

Proceedings of the Institution of Civil Engineers: Water Management

DOI

https://doi.org/10.1680/wama.11.00011

Collections

Department of Civil Engineering, Article

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Citation Formats

K. Demirbas, A. B. Altan Sakarya, and H. Önder, “Optimal dewatering of an excavation site,” Proceedings of the Institution of Civil Engineers: Water Management, pp. 327–337, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48359.