Multiobjective design of dynamic monitoring networks for detection of groundwater pollution
Dhar, Anirban, and Datta, Bithin (2007) Multiobjective design of dynamic monitoring networks for detection of groundwater pollution. Journal of Water Resources Planning and Management, 133 (4). pp. 329-338.
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A methodology is developed based on the solution of optimization models for optimal design of groundwater quality monitoring networks. The optimal monitoring network is time varying as the monitoring wells are installed in stages, considering the transient pollutant transport process. The monitoring locations specified as solution to the optimization model change with time. This ensures additional economy in the installation of the network, compared to a single stage network design. The optimization model incorporates uncertainties in prediction or estimation of some of the aquifer parameters such as hydraulic conductivity and dispersivity. Advective, dispersive, and radioactive decay processes of transport in a two-dimensional groundwater system are considered. Randomly generated aquifer parameter values are used to simulate different realizations of resulting pollutant plumes incorporating uncertainties in predicting the transport process. The simulated pollutant plume realizations are subsequently utilized to obtain cumulative distribution functions (CDFs) of actual concentrations at different spatiotemporal locations. These CDFs are incorporated as an approximated distribution function in the optimization model. These CDFs are used to define chance constraints with associated reliabilities. Both single and multiple objective nonlinear optimization models are developed. Performances of these models are evaluated for different specified values of reliabilities using illustrative problems considering tritium (H3) as the radioactive pollutant. This monitoring network design model is, in general, applicable to other types of pollutants as well.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||monitoring; ground-water pollution; optimization|
|Date Deposited:||22 Apr 2010 06:12|
|FoR Codes:||09 ENGINEERING > 0905 Civil Engineering > 090509 Water Resources Engineering @ 50%
09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 50%
|SEO Codes:||96 ENVIRONMENT > 9606 Environmental and Natural Resource Evaluation > 960604 Environmental Management Systems @ 50%
96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 25%
96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960506 Ecosystem Assessment and Management of Fresh, Ground and Surface Water Environments @ 25%