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http://dx.doi.org/10.4491/KSEE.2012.34.7.480

Runoff Characteristics of Non-Point Source according to Cultivation Activity in River District  

Ahn, Jae Hwan (Environmental Eng. Research Division, Korea Institute of Construction Technology)
Yun, Sang Leen (Environmental Eng. Research Division, Korea Institute of Construction Technology)
Kim, Seog Ku (Environmental Eng. Research Division, Korea Institute of Construction Technology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.34, no.7, 2012 , pp. 480-487 More about this Journal
Abstract
The field study was carried out to investigate runoff characteristics of non-point source (NPS) by cultivation activity in river district. Two sites were selected mainly as G region (paddy field, green house), located in Kwangju, Gyeonggi Province, and S region (ordinary field), located in Namyangju, Gyeonggi Province, those belong to Paldang reservoir watershed. The paddy field with water storage capacity showed a slow increase in runoff as rainfall intensity increases. Meanwhile, both green house and ordinary filed revealed a rapid increase. The average BOD runoff concentration of paddy field, green house, and ordinary field was 2.0 mg/L, 2.8 mg/L, 7.9 mg/L, respectively. It indicates that ordinary field shows the highest value in BOD, SS, T-N, and T-P concentration due to the soil loss during rainfall. As a result of runoff load estimation according to the field, a T-N runoff load of paddy field was 1,793.9 kg/year, higher than that of ordinary field. It was estimated that a SS runoff load of ordinary field was 69,704 kg/year and accounts for more than 70% of overall runoff load.
Keywords
Cultivated Land; River District; Non-Point Source; Runoff Load;
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