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Title: NEW APPROACH FOR DESIGN OF GROUNDWATER QUALITY MONITORING NETWORK USING ENTROPY THEORY

Author: R. R. Owlia, F. Hoseini and A. Abrishamchi

Year: 2009

Publisher: European Water Resources Association (EWRA)

Description:

Assessment of groundwater quality monitoring networks requires methods to determine the potential efficiency and cost-effectiveness of the current monitoring programs. To this end, the concept of entropy has been considered as a promising method in previous studies since it quantitatively measures the information produced by a network. In this study, the measure of Transinformation in the discrete entropy theory and the Transinformation-Distance (T-D) curves are used to quantify the efficiency of a monitoring network. This paper introduces a new approach for decreasing the dispersion in results by using cluster analysis which utilizes fuzzy equivalence relations. The sampling (temporal) frequency determination method recommends the future frequency of sampling for each location based on some criteria such as direction, magnitude, correlation with neighboring stations, and uncertainty of the concentration trend derived from representative historical concentration data. For the final step, the optimized groundwater quality monitoring network in space and time dimensions are introduced. The proposed methodology is applied to groundwater resources in the Tehran-Karadj Aquifer, Tehran, Iran.