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J Korean Soc Environ Eng > Volume 37(2); 2015 > Article
J Korean Soc Environ Eng 2015;37(2): 99-106. doi: https://doi.org/10.4491/KSEE.2015.37.2.99
하절기 새만금호 유입유사의 물리화학적 특성 분석
오경희, 정세웅, 조영철
충북대학교 환경공학과
Analysis of Physicochemical Characteristics of Suspended Sediments Flowing into the Saemangeum Reservoir in the Summer
Kyoung-Hee Oh, Se-Woong Chung, Young-Cheol Cho
Department of Environmental Engineering, Chungbuk National University
Corresponding author  Young-Cheol Cho ,Tel: 043-261-3577 , Fax: 043-264-2465, Email: choy@chungbuk.ac.kr
Received: August 20, 2013;  Revised: May 22, 2014;  Accepted: February 26, 2015.  Published online: February 28, 2015.
ABSTRACT
To estimate the effects of suspended sediments flowing into the Saemangeum Reservoir on the extent of contamination of the reservoir, the suspended sediments were collected with sediment traps, which were installed from the upstream of the Mankyung and Dongjin Rivers to estuary of the reservoir, respectively, and the sedimentation rates and the chemical characteristics of suspended sediments were analyzed. The sedimentation rates in the Mankyung and Dongjin Rivers were ranged from 0.01~5.06 and 0.01~8.75 kg/m2/day, respectively. Those were higher to the upstream of rivers, and were mainly affected by flood events. The concentrations of organic matters were from 3.3 to 9.6 times higher than those in the stream sediments and were higher after flood season, indicating the contaminants come from the non-point sources on the basin. The concentrations of total nitrogen and total phosphorus in the suspended sediments showed the same trend with the organic matters. These results indicate that the suspended sediments from the basin of the Mankyung and Dongjin Rivers are highly contaminated and the countermeasures to manage the sources of contamination on the basin are required to maintain the water quality of the Saemangeum Reservoir.
Key Words: Saemangeum Reservoir, Mankyung River, Dongjin River, Suspended sediment, Sedimentation rate, Contamination level
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