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J Korean Soc Environ Eng > Volume 37(5); 2015 > Article
J Korean Soc Environ Eng 2015;37(5): 277-284. doi: https://doi.org/10.4491/KSEE.2015.37.5.277
대청호 추소 및 추동 수역 퇴적물의 오염도 평가
오경희, 조영철
충북대학교 환경공학과
Evaluation of Contamination Level of the Sediments from Chusori and Chudong Areas in Daechung Reservoir
Kyoung-Hee Oh, 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: December 15, 2015;  Revised: March 16, 2015;  Accepted: May 18, 2015.  Published online: May 31, 2015.
ABSTRACT
In order to analyze the contamination level of sediment samples taken from Chusori and Chudong areas in Daechung Reservoir, the particle size and concentrations of organics and nutrients were analyzed and phosphorus fractionation analysis was conducted. The average fraction of silt-sized particles was 92% in the sediments taken from Chudong area and Chusori area at the site adjacent to main current, which was higher than that from the upper Chusori area. The concentrations of total phosphorus in the sediments at Chusori and Chudong area were 999 (±98) and 1,123 (±119) mg/kg sediment, respectively. The fractions of autochthonous phosphorus, which can be readily eluted by change of environmental conditions, were much higher than those of allochthonous phosphorus, indicating the internal load can contribute the eutrophication in these areas. The concentrations of total nitrogen were over 5,600 mg/kg sediment in all samples, which is the guideline of Contamination Assessment of River and Lake Sediments of the Ministry of Environment, indicating the contamination level of total nitrogen is serious in the sediments. It is concluded that the countermeasures to manage the quality of sediments are required to improve the water quality in the Daechung Reservoir.
Key Words: Daechung Reservoir, Sediment, Phosphorus Fractionation, Internal Loading
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