Hydrologic modeling of Low Impact Development systems at the urban catchment scale

摘要: Summary In this paper, the implementation of Low Impact Development systems (LIDs) as source control solutions that contribute to restore critical components natural flow regimes, is analyzed at urban catchment scale. The hydrologic response a small investigated under different land use conversion scenarios including installation green roofs and permeable pavements. modeling undertaken using EPA SWMM; “do nothing” scenario calibrated validated based on field measurements while LID modules are laboratory test measurements. simulations carried out by input synthetic hyetographs derived for three return periods (T = 2, 5 10 years). Modeling results confirm effectiveness even design storm event (T = 10 years): in particular minimum area, corresponding Effective Impervious Area reduction 5%, required obtain noticeable benefits. peak reduction, volume hydrograph delay performance indexes. Findings present research show linearly increases with increasing EIA percentages: 36% (corresponding whole rooftops parking lot areas), reductions rise till 0.45 0.23 respectively 0.19.