| Title |
Estimation of Sources for Nitrate in Groundwater at Ongpo Stream Watershed in Jeju Island |
| Authors |
이용두 ( Lee Yong Du ) ; 현승규 ( Hyeon Seung Gyu ) ; 송희경 ( Song Hui Gyeong ) |
| Keywords |
nitrate; nitrogen isotope; groundwater; chemical fertilizer; livestock manure; sewage |
| Abstract |
The purpose of this study was to identify nitrate pollution level and Sources in groundwater at the watershed of Ongpo stream. For this study, two springs(S1 and S2) and 8 wells(W1 - W8) were Selected and investigation was accomplished from April to October, 2001 In using nitrate-nitrogen concentration and stable N isotopes. five sampling sites(S1, S2. W1, W2 and W5) were affected by livestock manure or sewage, but temporarily affected by chemical fertiiizer. Effects of livestock manure or sewage and chemical fertilizer for W3 and W4 were similar but they were affected by chemical Fertilizer in temporal. |