| Title |
Generation and Discharge Characteristics of Non-point Pollutants from Farmlands of Small Watershed for Nak-dong River |
| Authors |
정용준 ( Yong Jun Jung ) ; 남광현 ( Kwang Hyun Nam ) ; 민경석 ( Kyung Sok Min ) |
| Keywords |
Generation and discharge load; Nan-point pollutants; Farmland |
| Abstract |
This study was carried out to investigate the generation and discharge characteristics of non-point pollutants from farmlands in Nak-dong river basin. Annual unit generation load of nitrogen and phosphorus by fertilization in the test paddy field was almost similar to those calculated by the fertilization standards of district agricultural technology center, but it was extremely higher in case of the test dry field. By comparing annual total generation load of nutrients from fertilization to the data of fertilizer marketing, the accurate forecasting of generation load of pollutants was achieved by marketing data. The annual total discharge ratio of nutrients through infiltration and overflow from the farmland of the test paddy field were 9.5% and 1.1%, respectively, and those in the test dry field were 22.0% and 0.1%, respectively. The monthly discharge load of nutrients were shown the highest proportioned to the discharge load from lands, but it showed higher in phosphorus, which was caused by the intermittent discharge of phosphorus accumulated in drainage. |