Uncertainty based multi-objective optimization of groundwater remediation at the Umatilla Chemical Depot

Abhishek Singh, Barbara Minsker

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Management of groundwater contamination often involves conflicting objectives and substantial uncertainty. A critical source of this uncertainty in groundwater problems often stems from uncertainty in the hydraulic conductivity values for the aquifer. For a remediation solution to be reliable in practice it is important that it is robust over such potential errors. This paper presents the application of a robust multi-objective optimization method on a field-scale pump-and-treat design problem at the Umatilla Chemical Depot site at Hermiston, Oregon. A simple methodology is used to establish plausible realizations of hydraulic conductivity that are then efficiently sampled within the optimization framework using Latin Hypercube sampling. A noisy multi-objective genetic algorithm, developed and tested earlier on a hypothetical aquifer, is then applied to this field-scale case to come up with a set of robust and Pareto-dominant design solutions for the clean up of contaminants (RDX and TNT) in the groundwater. Interactions between the various trade-offs and the inherent uncertainty at the site are analyzed. Finally it is demonstrated that by using such robust multi-objective optimization schemes, it is possible to increase robustness of the optimal solutions without significant increases in costs.

Original languageEnglish (US)
Title of host publicationProceedings of the 2004 World Water and Environmetal Resources Congress
Subtitle of host publicationCritical Transitions in Water and Environmental Resources Management
EditorsG. Sehlke, D.F. Hayes, D.K. Stevens
Pages3589-3598
Number of pages10
StatePublished - Dec 1 2004
Event2004 World Water and Environmental Resources Congress: Critical Transitions in Water and Environmental Resources Management - Salt Lake City, UT, United States
Duration: Jun 27 2004Jul 1 2004

Publication series

NameProceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management

Other

Other2004 World Water and Environmental Resources Congress: Critical Transitions in Water and Environmental Resources Management
CountryUnited States
CitySalt Lake City, UT
Period6/27/047/1/04

ASJC Scopus subject areas

  • Engineering(all)

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    Singh, A., & Minsker, B. (2004). Uncertainty based multi-objective optimization of groundwater remediation at the Umatilla Chemical Depot. In G. Sehlke, D. F. Hayes, & D. K. Stevens (Eds.), Proceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmental Resources Management (pp. 3589-3598). (Proceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management).