Best management practices for nutrient and sediment retention in urban stormwater runoff.

摘要: Stormwater management infrastructure is utilized in urban areas to alleviate flooding caused by decreased landscape permeability from increased impervious surface cover (ISC) construction. In this study, we examined two types of stormwater detention basins, SDB-BMPs (stormwater basin-best practice), and SDBFCs basin–flood control). Both are constructed retain peak flows for flood mitigation. However, the also designed using basin topography wetland vegetation provide water quality improvement (nutrient sediment removal retention). The objective study was compare SDB (both SDB-BMP SDB-FC) soil P concentrations, saturation, Fe chemistry with natural riparian wetlands (RWs), sites Fairfax County, Virginia as a model system. SDBBMPs had significantly greater total (Pt) concentrations than RWs SDB-FCs (831.9 6 32.5 kg ha 21 , 643.3 19.1 652.1 18.8 respectively). sorption capacities were similar RWs, those SDB-FCs, appearing result retention compared SDB-FCs. Increased relatively amounts more crystalline forms soils suggested deposition RW SDB-FC soils. Data suggest that nutrient facilitated SDB-BMPs. When necessary, use instead could foster responsible development be an appropriate mitigation action receiving aquatic ecosystems.