Wellhead Protection Area Delineations For The Lewes-Rehoboth Beach Area, Delaware

Author(s)Andres, A.S.
Author(s)Duffy, C.A.
Author(s)Costas, E.M.
Date Accessioned2007-12-10T14:27:09Z
Date Available2007-12-10T14:27:09Z
Publication Date2003
AbstractWater supply in the rapidly developing Lewes and Rehoboth Beach areas of coastal Sussex County in Delaware is provided by more than 80 individual public water wells and hundreds of domestic wells. Significant concerns exist about the future viability of the ground-water resource in light of contamination threats and loss of recharge areas. As part of Delaware's Source Water and Assessment Protection Program, wellhead protection areas (WHPAs) were delineated for the 15 largest public supply wells operated by three public water systems. The WHPAs are derived from analysis of results of dozens of steady-state ground-water flow simulations. The simulations were performed with a Visual MODFLOW-based 6-layer, 315,600-node model coupled with GIS-based data on land cover, ground-water recharge and resource potentials, and other base maps and aerial imagery. Because the model was operated under steady-state conditions, long-term average pumping rates were used in the model. The flow model includes four boundary types (constant head, constant flux, head-dependant flux, and no flow), with layers that represent the complex hydrogeologic conditions based on aquifer characterizations. The model is calibrated to within a 10% normalized root mean squared error of the observed water table.en_US
PublisherNewark, DE: Delaware Geological Survey, University of Delawareen_US
Part of SeriesReport of Investigationsen_US
Part of Series65en_US
KeywordsLewes and Rehoboth Beach areas of Delawareen_US
Keywordscoastal Sussex County in Delawareen_US
Keywordscontamination threatsen_US
Keywordsloss of recharge areasen_US
KeywordsDelaware's Source Water and Assessment Protection Programen_US
Keywordswellhead protection areasen_US
TitleWellhead Protection Area Delineations For The Lewes-Rehoboth Beach Area, Delawareen_US
TypeTechnical Reporten_US
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