Central Campus Stormwater Evaluation for LEED and Planning
University of California, Davis
The goal of this study was to develop a document that could serve as the basis for obtaining LEED credit for New Construction (NC) and for Commercial Interiors (CI). Land use conditions were evaluated for the years 2011 (existing conditions), 2015 (short term future land use), and 2030 (and long term future land use). The impervious coverage in the Central Campus was determined for each time period, and the existing conditions impervious coverage was field verified and revised. It was concluded that the best way to reduce impervious coverage was to construct multi-level parking garages and remove single-level parking lots.
Several low impact development (LID) techniques were evaluated to reduce the overall runoff rates, including rain gardens, porous concrete and pervious pavement, infiltration trenches, removal of impervious surfaces, and grassy swales. The LID techniques sizes were determined on a per acre of new impervious coverage basis. It was concluded that use of these techniques (or combinations of the techniques) could reduce the overall future runoff rates to or below the existing conditions runoff rates, thereby meeting the requirements for receiving campus-wide LEED credits.