Abstract
This study is the evaluation and analysis on monitoring for reduction of peak runoff, ecological and environmental effectiveness of the dispersal detention system in the apartment complex that was made in the country for the first time. After ecological and environmental restorative construction the hydrological monitoring results showed the flood peak discharge of the ten-year period in Seoul area is reduced by 12% and show the lagged effect of 20 minutes. For ecological environmental waterway that was most concerned from the hydraulic point view, ecological wooden crib and natural stone work showed stability in order. For florae as ecological restoration effect, 11 families 15 species of Korean persicary, bulrush, Iris pseudoacorus L., reed, Phragmites japonica Steud. were dominant for flora species within the dispersal detention system and for faunas 3 families 4 species of endangered narrow-mouthed toad, Rana nigromaculata, Rana amuriensis coreana were found. BOD of inflow water purification effect was inflow concentration of 1.2 mg/l, outflow concentration of 0.7~0.8 mg/l, SS showed inflow concentration of 6.3 mg/l, outflow concentration of 5.0 mg/l as a results very clear water was monitored.
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