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Simulation of Rainfall‐Runoff Response in Ecological Swale with On‐Line Subsurface Detention Using Infoworks SD
Author(s) -
Ghadim Hamed Benisi,
Hin Lai Sai
Publication year - 2017
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143017x14902968254764
Subject(s) - swale , environmental science , infiltration (hvac) , surface runoff , hydrology (agriculture) , stormwater , drainage , subsurface flow , storm water management model , drainage system (geomorphology) , hydrograph , detention basin , retention basin , ecology , engineering , geotechnical engineering , geography , groundwater , meteorology , biology
The Bio‐Ecological Drainage System (BIOECODS) is a sustainable drainage (SUDS) to demonstrate the ‘control at source' approaches for urban stormwater management in Malaysia. It is an environmentally friendly drainage system that was designed to increase infiltration, reduce peak flow at outlet, improve water quality, through different BMPs, such as grass swale, retention pond, etc. A special feature of BIOECODS is ecological swale with on‐line subsurface detention. This study attempted to create a model of ecological swale with on‐line subsurface conveyance system with InfoWorks SD. The new technique has been used Storm Water Management Model (SWMM) model to describe overland flow routing and Soil Conservation Service Method (SCS) used to model infiltration or subsurface flow. The modeling technique has been proven successful, as the predicted and observed closely match each other, with a mean error of 4.58 to 7.32%. The calibrated model then used to determine the ratio of the flow exchange between the surface and subsurface drainage system. Results from the model showed that the runoff ratio exchange between the surface and subsurface is 60 to 90%.