| Title |
Comparison of NPS Pollution Characteristics between Snowmelt and Rainfall Runoff from a Highland Agricultural Watershed |
| Authors |
최용훈 ( Yong Hun Choi ) ; 원철희 ( Chul Hee Won ) ; 박운지 ( Woon Ji Park ) ; 신민환 ( Min Hwan Shin ) ; 신재영 ( Jae Young Shin ) ; 이수인 ( Su In Lee ) ; 최종대 ( Joong Dae Choi ) |
| Keywords |
Flow Mean weighted concentration; NPS; Pollutant load; Rainfall; Snowmelt |
| Abstract |
Runoff, NPS pollution load and flow-weighted mean concentration (FWMC) occurred by snowmelt and rainfall runoff were compared by a variance analysis. Snowmelt runoff ranged between 1,449 and 19,921 m3/day. The peak snowmelt runoff was similar to the runoff that occurred by about 40mm/day rainfall. And average snowmelt runoff was not significantly different from the runoff that occurred by 25.5 mm/day rainfall. Average values of SS loads and FWMCs were 5,438 kg/day and 954.9 mg/L, respectively. SS loads and FWMCs were in the similar range with those that occurred by 39.0 mm/day and 53.0 mm/day rainfall, respectively. Daily SS and COD loads and FWMCs occurred by snowmelt and rainfall were analyzed not to be significantly different. Overall assessment led that the NPS pollution loads by snowmelt runoff had a similar characteristics with the loads by about 40 mm/day rainfall runoff. It was recommended that the agricultural fields in snowy region needs to managed not only for rainfall runoff but also snowmelt runoff for an effective water quality management. |