This study chose a proper area at Oncheon-Cheon, where the flood takes place frequently due to urbanization and climate change, to install LID(Low Impact Development), and was meant to maximize runoff reduction effectiveness, planning various LID design scenario in the area. The analysis is based on...
This study chose a proper area at Oncheon-Cheon, where the flood takes place frequently due to urbanization and climate change, to install LID(Low Impact Development), and was meant to maximize runoff reduction effectiveness, planning various LID design scenario in the area. The analysis is based on collected baseline data with modeling SWMM(Storm Water Management Model) and SUSTAIN(System for Urban Stormwater Treatment and Analysis Integration). Geographic data, such as DEM(Digital Elevation Model), landuse, and LID and cost data which were calculated with SUSTAIN manual and many references referred are used to build SUSTAIN model. The simulation was conducted by rainfall data of 2010 from Busan Regional Office of Meteology. The most urbanized subwatershed was selected, analyzing landuse data with ARCGIS module. After installing LID elements like infiltration trench, bioretention, porous pavement, etc., it was simulated.
Considering rainfall characteristic of Korea which is concentrated in summer, stormwater reduction effectiveness was analyzed, especially in flood season. Reduction effectiveness according to data properties was compared by analyzing a flood season with daily and monthly division. In the part of runoff reduction effectiveness, the result was similar in both daily and monthly, but monthly peakflow reduction effectiveness was calculated higher about 7%. Also, it was found that 49.09% of flood season runoff and about 24.9% of annual average runoff were decreased, if infiltration trench and bioretention were set in sub 38, 39, 41. From those results, stormwater reduction effectiveness with LID design in Oncheon-Cheon was confirmed, but in Korea, the basic material of LID and cost is insufficient. Hence, study based on more accurate basic data is required in the future.
This study chose a proper area at Oncheon-Cheon, where the flood takes place frequently due to urbanization and climate change, to install LID(Low Impact Development), and was meant to maximize runoff reduction effectiveness, planning various LID design scenario in the area. The analysis is based on collected baseline data with modeling SWMM(Storm Water Management Model) and SUSTAIN(System for Urban Stormwater Treatment and Analysis Integration). Geographic data, such as DEM(Digital Elevation Model), landuse, and LID and cost data which were calculated with SUSTAIN manual and many references referred are used to build SUSTAIN model. The simulation was conducted by rainfall data of 2010 from Busan Regional Office of Meteology. The most urbanized subwatershed was selected, analyzing landuse data with ARCGIS module. After installing LID elements like infiltration trench, bioretention, porous pavement, etc., it was simulated.
Considering rainfall characteristic of Korea which is concentrated in summer, stormwater reduction effectiveness was analyzed, especially in flood season. Reduction effectiveness according to data properties was compared by analyzing a flood season with daily and monthly division. In the part of runoff reduction effectiveness, the result was similar in both daily and monthly, but monthly peakflow reduction effectiveness was calculated higher about 7%. Also, it was found that 49.09% of flood season runoff and about 24.9% of annual average runoff were decreased, if infiltration trench and bioretention were set in sub 38, 39, 41. From those results, stormwater reduction effectiveness with LID design in Oncheon-Cheon was confirmed, but in Korea, the basic material of LID and cost is insufficient. Hence, study based on more accurate basic data is required in the future.
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#LID 설계 SWMM모형
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