Optimization models for siting water quality monitoring stations in a catchment |
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Authors: | Jehng-Jung Kao Pei-Hao Li Wen-Shin Hu |
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Institution: | (1) Institute of Environmental Engineering, National Chiao Tung University, 75 Po-Ai Street, Hsinchu, 300, Taiwan, Republic of China |
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Abstract: | A water quality monitoring network (WQMN) must be designed so as to adequately protect the water quality in a catchment. Although
a simulated annealing (SA) method was previously applied to design a WQMN, the SA method cannot ensure the solution it obtained
is the global optimum. Therefore, two new linear optimization models are proposed in this study to minimize the deviation
of the cost values expected to identify the possible pollution sources based on uniform cost (UC) and coverage elimination
uniform cost (CEUC) schemes. The UC model determines the expected cost values by considering each sub-catchment being covered
by which station, while the CEUC model determines the coverage of each station by eliminating the area covered by any upstream
station. The proposed models are applied to the Derchi reservoir catchment in Taiwan. Results show that the global optimal
WQMN can be effectively determined by using the UC or CEUC model, for which both results are better than those from the SA
method, especially when the number of stations becomes large. |
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Keywords: | |
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