| Title |
An Approach for the Estimation of NPS Pollutant Discharge |
| Authors |
( Eui So Choi ; Geon Ha Kim ; Zu Whan Yun ) |
| Abstract |
The pollutant generation and discharge rates from the nonpoint sources(NPS) in selected areas were evaluated. An urban area as well as a typical agricultural area with feedlot farming region were considered for evaluation. The pollutant generation rate from the NPS in urban area was estimated as 4,822 ㎏COD/ha/year, 24,651 ㎏SS/ha/year, 203 ㎏T-N/ha/year, and 56 ㎏T-P/ha/year. Approximately 47% of the pollutants was discharged to the Han River during the flooding season of July to August. The NPS pollutant discharge rates from the urban area to the Han river were computed as 98 ㎏ COD/ha/year, 1,437 ㎏SS/ha/year, 76 ㎏T-N/ha/year, and 1.22 ㎏ T-P/ha/year, which were significantly less than the generation rates. The pollutant: generation rates fron the NPS in agricultural area was estimated as 53 ㎏BOD/ha/year, 175 ㎏COD/ha/year, 51 ㎏SS/ha/year, 12.6 ㎏T-N/ha/year. and 8.1 ㎏T-P/ha/year. The feedlot farming region in the agricultural area generated similar amount of pollutants per unit area compared to the urban area. |