| Title |
Characteristics of Organic Matters in the Suyeong River During Rainfall Event |
| Authors |
김수현 ( Kim Suhyun ) ; 김정선 ( Kim Jungsun ) ; 강임석 ( Kang Limseok ) |
| DOI |
https://doi.org/10.15681/KSWE.2018.34.5.487 |
| Keywords |
Biodegradation DOC; Organic matter; Rainfall; Suyeong River |
| Abstract |
Urban stormwater runoff is the one of the most extensive causes of deterioration of water quality in streams in urban areas. Especially, in the Suyeong River watershed, non-point sources from urban-residential areas are the most common cause of water pollution. Also, it has been ascertained that BOD and COD as indexes of organic matter, have limitation on management of Suyeong River’s water quality. In this study, changes of organic matter properties of Suyeong River from inflow of non-point source during rainfall were investigated. Fractions of organic matters were analyzed using water samples collected at two sites (Suyeong River and Oncheon Stream) during a rain event. Variations of dissolved organic carbon (DOC) concentration by rainfall were similar to flow rate change in the river. Distribution of organic matter fraction according to change of rain duration revealed that while hydrophilic component increased at initial rainfall, the hydrophobic component was similar to change in dissolved organic carbon (DOC) concentration. Also, the relative proportion of hydrophilic components in organic matter in river water increased, due to rainfall. Results of biodegradation of organic matters revealed that decomposition rate of organic matters during rainfall was higher than that of during a non-rainfall event. |