Journal of Korean Society of Agricultural Engineers ISSN:1738-3692(Print) 2093-7709(Online) 한국농공학회논문집

This study was performed to investigate the stream water quality characteristics in Hengjeong Bridge Basin of Dongjin River during twelve months from October, 2010 to September, 2011. Also, pollutant loads were calculated on the basis of the water quality and runoff results. The results showed that ranges of water temperature, pH and EC were 6.2∼23.90 ℃, 6.32∼7.78, 84.4∼126.5 μS/cm respectively. The Concentration of DO, BOD, COD, SS, Tot-N and Tot-P were observed as 6.80∼9.20 mg/L, 0.40∼1.60 mg/L, 1.96 ∼4.41 mg/L, 59.60∼142.20 mg/L, 1.28∼3.52 mg/L, 0.001∼0.07 mg/L respectively. Tot-N showed correlativity with BOD, and Tot-P showed correlativity with SS. The runoff pollutant loading of Tot-N and Tot-P were 117.94 kg/ha and 2.06 kg/ha respectively, in Hengjeong bridge of Dongjin river watershed. In the case of the correlativity between runoff pollutant loads and concentrations, Tot-N and Tot-P show low significant relationships.