Cost-effective long-term monitoring design for intrinsic bioremediation

P. Reed, Barbara S Minsker, A. Valocchi

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

Abstract

The goal of this research is to develop a formal methodology for long-term sampling and monitoring at intrinsic bioremediation sites. Intrinsic bioremediation couples the ability of indigenous microbial activity to decay contaminants with long-term site sampling and monitoring to insure regulatory compliance. This methodology combines optimization and simulation to choose sampling locations that quantify the mass of contaminant while minimizing monitoring costs. It has three primary components: (1) groundwater fate-and-transport simulation, (2) geostatistical interpolation and global mass estimation, and (3) monitoring plan design using a genetic algorithm (GA). Contaminant concentrations at all potential monitoring locations are predicted using the Reactive Transport in 3-Dimensions (RT3D) simulation package. Kriging subroutines are then combined with a GA to search for sampling plans that accurately describe the contaminant mass in the plume at minimal cost. For each sampling plan, the RT3D output is used by the kriging subroutines to estimate contaminant concentrations at all unsampled locations within the domain and the total mass of contaminant. Results show that this methodology is effective at both reducing sampling costs and accurately quantifying the mass of contaminant in the plume. The effects of various GA parameters on model performance are also presented. Extensions of this work in the future will include exploring the efficacy of alternate plume interpolation schemes, incorporating uncertainty, and testing other types of GAs.

Original languageEnglish (US)
Title of host publicationWRPMD 1999
Subtitle of host publicationPreparing for the 21st Century
PublisherAmerican Society of Civil Engineers (ASCE)
ISBN (Print)0784404305, 9780784404300
DOIs
StatePublished - Jan 1 1999
Event29th Annual Water Resources Planning and Management Conference, WRPMD 1999 - Tempe, AZ, United States
Duration: Jun 6 1999Jun 9 1999

Publication series

NameWRPMD 1999: Preparing for the 21st Century

Other

Other29th Annual Water Resources Planning and Management Conference, WRPMD 1999
CountryUnited States
CityTempe, AZ
Period6/6/996/9/99

ASJC Scopus subject areas

  • Computer Networks and Communications

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