Effectiveness of low impact development practices in two urbanized watersheds: retrofitting with rain barrel/cistern and porous pavement.

摘要: The impacts of urbanization on hydrology and water quality can be minimized with the use low impact development (LID) practices in urban areas. This study assessed performance rain barrel/cistern porous pavement as retrofitting technologies two urbanized watersheds 70 40 km2 near Indianapolis, Indiana. Six scenarios consisting watershed existing condition, 25% 50% implementation pavement, combined were evaluated using a proposed LID modeling framework Long-Term Hydrologic Impact Assessment (L-THIA)–LID model. model was calibrated for annual runoff from 1991 to 2000, validated 2001 2010 watersheds. For calibration period, R2 NSE values greater than 0.60 0.50 streamflow. Baseflow not this study. During validation streamflow, 0.30 baseflow various application levels resulted 2–12% reduction pollutant loads slightly increased increase by more 1%. However, led total streamflow associated 1–9% results also indicate that barrel/cistern, are good options these L-THIA–LID used inform management decision-making at scale.