Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 261, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2019.109920
Keywords
Low impact development; Storm water management model; Soil water movement; HYDRUS
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Funding
- Korea Environment Industry & Technology Institute(KEITI) through The Chemical Accident Prevention Technology Development Project - Korea Ministry of Environment (MOE) [2016001970001]
- Basic Core Technology Development Program for the Oceans and the Polar Regions of the National Research Foundation (NRF) - Ministry of Science, ICT & Future Planning [NRF-2016M1A5A1027457]
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Green roof can mitigate urban stormwater and improve environmental, economic, and social conditions. Various modeling approaches have been effectively employed to implement a green roof, but previous models employed simplifications to simulate water movement in green roof systems. To address this issue, we developed a new modeling tool (SWMM-H) by coupling the stormwater management and HYDRUS-1D models to improve simulations of hydrological processes. We selected green roof systems to evaluate the coupled model. Rainfall-runoff experiments were conducted for a pilot-scale green roof and urban subbasin. Soil moisture in the green roof and runoff volume in the subbasin were simulated more accurately by using SWMM-H instead of SWMM. The scenario analysis showed that SWMM-H selected sandy loam for controlling runoff whereas SWMM recommended sand. In conclusion, SWMM-H could be a useful tool for accurately understanding hydrological processes in green roofs.
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