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KMID : 1024520120210101203
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Journal of the Environmental Sciences
2012 Volume.21 No. 10 p.1203 ~ p.1212
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Comparison of NPS Reduction at Yongsan Area Considering Spatio-Temporal Chnages in CN
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Choi Jae-Wan
Lee Sung-Joon
Ryu Ji-Chul
Shin Dong-Seok
Lim Kyoung-Jae
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Abstract
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Yongsan ward is located at central place connecting south and north ecology axis of seoul. Various environment-friendly
Yongsan development could pose positive effects on NPS(non pollutant source) pollutant reductions and water quality
improvement at Han-rive because BOD, T-N, and T-P NPS discharges took 90% of total pollutant from this area. In this
study, direct runoff and NPS pollutant loads were evaluated before and after development using spatio-tamporal change in
CN(curve number) and EMC(event mean concentration) data. It was found that direct runoff value is 23,584,724 m3
, and BOD, T-N and T-P loads are 104,456 kg/year, 111,483 kg/year and 7,500 kg/year under pre-development condition,
respectively. Annual runoff, BOD, T-N and T-P reducing rate were 12.9%, 33.3%, 35.6% and 40.7% under integrated
post-development condition, respectively. Based on the results obtained in this study, environment-friendly urban
development could be achieved at Yongsan area.
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KEYWORD
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Development, Direct runoff, NPS load, Spatio-temporal CN
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