Modeling of a Groundwater Circulation Well Removal Action Alternative
This paper presents the basis for using groundwater circulation wells (GCWs) for removal actions focused on contaminated domestic water supplies. A properly placed GCW could be used to pretreat water before it enters a domestic well. Commercial software was used to develop a model for GCWs installed at a Nebraska Superfund site to perform a feasibility study of a GCW-based removal action. Deterministic capture zone analysis provided guidance for locating vertically installed GCW up-gradient of an existing domestic well at the site. A deviation of up to 7.6 m off-center of the hydraulic gradient may be permissible. A GCW flow rate range to provide a sufficiently large recharge zone to protect a typical domestic well was identified for the site. Stochastic analysis indicated that the system was sensitive to horizontally variable hydraulic conductivity. Modeling results indicate that a GCW may both reduce contaminant mass in the aquifer, and act as a water supply replacement alternative to point of use treatment systems.
G. R. Miller and A. C. Elmore, "Modeling of a Groundwater Circulation Well Removal Action Alternative," ASCE Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management, American Society of Civil Engineers (ASCE), Apr 2005.
The definitive version is available at http://dx.doi.org/10.1061/(ASCE)1090-025X(2005)9:2(122)
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Environmental Issues; Groundwater; Nebraska; Wastewater Management; Water Treatment; Wells
Article - Journal
© 2005 American Society of Civil Engineers (ASCE), All rights reserved.