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Modeling of transient groundwater flow, pollutant transport, and biodegradation in an aquifer with large hydraulic head variations

Hydrogeology journal, 2014-06, Vol.22 (4), p.943-956 [Peer Reviewed Journal]

Springer-Verlag Berlin Heidelberg 2014 ;Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 1431-2174 ;EISSN: 1435-0157 ;DOI: 10.1007/s10040-013-1096-7

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Title:
Modeling of transient groundwater flow, pollutant transport, and biodegradation in an aquifer with large hydraulic head variations
Author: Rinaldi, Sandro ; Louati, Sihem ; Bendjoudi, Hocine ; de Marsily, Ghislain
Subjects: Aquatic Pollution ; Aquifers ; Biodegradation ; Computational fluid dynamics ; Earth and Environmental Science ; Earth Sciences ; Fluid flow ; Geology ; Geophysics ; Geophysics/Geodesy ; Ground-water flow ; Groundwater ; Hydraulics ; Hydrocarbon leakage & seepage ; Hydrogeology ; Hydrology ; Hydrology/Water Resources ; Mathematical models ; Parametrization ; Pollutants ; Sciences of the Universe ; Surface water ; Waste Water Technology ; Water Management ; Water Pollution Control ; Water Quality/Water Pollution
Is Part Of: Hydrogeology journal, 2014-06, Vol.22 (4), p.943-956
Description: Industrially sourced dense non-aqueous phase liquids (DNAPLs) contaminated an alluvial aquifer in France decades ago. The location(s) and nature of the pollution source zone(s) were unknown, and the dissolved concentrations of volatile organic compounds in the monitoring wells varied greatly with time. The aquifer was in hydraulic equilibrium with an artificial canal whose water level was highly variable (up to 5 m). These variations propagated into the aquifer, causing changes in the groundwater flow direction; a transient numerical model of flow and solute transport showed that they correlate with the concentration variations because the changes in the flow direction resulted in the contaminant plume shifting. The transient hydrogeological numerical model was built, taking into account solvent biodegradation with first-order chain, since biodegradation has a significant influence on the pollutant concentration evolution. The model parameterization confirms the position of the source zones among the potential troughs in the bedrock where DNAPLs could have accumulated. The groundwater model was successfully calibrated to reproduce the observed concentration variations over several years and allowed a rapid validation of the hypotheses on the functioning of the polluted system.
Publisher: Berlin/Heidelberg: Springer Berlin Heidelberg
Language: English
Identifier: ISSN: 1431-2174
EISSN: 1435-0157
DOI: 10.1007/s10040-013-1096-7
Source: Alma/SFX Local Collection
ProQuest Central

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Modeling of transient groundwater flow, pollutant transport, and biodegradation in an aquifer with large hydraulic head variations

Springer-Verlag Berlin Heidelberg 2014 ;Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 1431-2174 ;EISSN: 1435-0157 ;DOI: 10.1007/s10040-013-1096-7

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