도암호 유역 송천에서의 강우유출수 분석을 통한 EMC와 초기세척비율 (MFFn) 산정

초록

The Doam Lake watershed has a significant impact on the downstream water system due to nutrients and sediment outflow during rainfall caused bysteep slopes, soil losses, and fertilization. These non-point sources are unclear in the discharge area and are affected by land use patterns, soilcharacteristics, and topographical features of the watershed. Therefore, this study conducted rainfall monitoring from July to October 2019 in Songcheonupstream of the Doam Lake watershed, one of the non-point pollution source management areas. Then, after analyzing rainfall runoff, Event MeanConcentration (EMC) and Mass First Flush ratio (MFFn) were calculated to compare and analyze the characteristics of rainfall and the non-pointpollutant discharge. As a result of the analysis, it showed various non-point pollutant emission characteristics for each rainfall event. In addition, theconcentration of EMC and the MFFn were affected by the average rainfall intensity and the maximum rainfall intensity, and were not significantlyaffected by the number of antecedent drying days. In the future, it is expected that effective non-point source reduction measures and managementmeasures according to rainfall intensity through continuous monitoring and analysis will be needed.

키워드