Assessment of Increased Recharge due to Urbanization and Stormwater Detention

Location

Chandler, Arizona

Client

City of Chandler

Project Description

GSA conducted an evaluation to quantify groundwater recharge resulting from engineered stormwater capture and retention in the City of Chandler. Historic precipitation records were analyzed to determine the precipitation characteristics of dry, normal, and wet years. These data were combined with a detailed GIS land use and surface cover analysis to generate estimates of stormwater runoff within the city limits. In addition, approximately 4,000 drywells were identified and included in the analysis. Groundwater recharge through drywells and retention basins was then estimated using analytical methods. Net percolation resulting from turfgrass and agriculture was also estimated

Project Highlights