The Effectiveness of Rain Gardens as a Low-Impact Development Strategy for Storm Water Pollution Reduction in Western Washington
Date of Award
Undergraduate Capstone Project
Master of Applied Science
University College, Environmental Policy and Management
Environmental Policy & Mgmt
Bioretention, Low-impact development, Rain gardens, Stormwater management, Stormwater runoff, Water quality
Stormwater runoff is a major cause of surface water pollution in western Washington and cost-effective control measures are needed to reduce contamination of receiving waters. This project evaluated the performance efficiency and costs of installing a residential rain garden by inspecting two gardens and testing water quality samples in one. Infiltration through the garden was effective in reducing metals and nutrients as indicated by reductions in copper and nitrate concentrations of 75% and 97%, respectively. The costs were affordable for most homeowners and cost-effective compared to other options. After doing on-site investigations, the storm water manual for the State of Washington was reviewed and eight recommendations were made for improving it.
Copyright is held by the author. Permanently suppressed.
Lohmann, Drew, "The Effectiveness of Rain Gardens as a Low-Impact Development Strategy for Storm Water Pollution Reduction in Western Washington" (2010). University College: Environmental Policy and Management Capstones. 94.