The purpose of this study was to calculate the delivery ratio of pollutant in the Yongdam reservoir basin using SWAT model. Delivery ratio is defined as a ratio of effluent pollutant loads divided by delivery discharge loads and influenced by characte...
The purpose of this study was to calculate the delivery ratio of pollutant in the Yongdam reservoir basin using SWAT model. Delivery ratio is defined as a ratio of effluent pollutant loads divided by delivery discharge loads and influenced by characteristics of watershed such as slope, length, density of stream, hydrology, location of pollution sources. Accordingly, this study was performed using SWAT model which is available to simulate delivery discharge loads with reflecting geographical and hydorological characteristics and spatial distribution characteristics. As a result, in 2002, annual average BOD delivery ratios were 0.23∼0.65 in the dry season. During the rainy season, delivery ratios were 0.85∼1.52 due to the influence of nonpoint sources.