Impact of Salinity Change on Water Quality Variables from the Sediment of an Artificial Lake under Anaerobic Conditions

Tae-Hoon Kim, Ji Hoon Kang, Sang Hyun Kim, I-Song Choi, Kwang-Hyeon Chang, Jong Min Oh and Ki-Hyun Kim
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Tae-Hoon Kim: Department of Environmental Application Science, Kyung Hee University, Yongin-si 17104, Korea
Ji Hoon Kang: School of Earth, Environmental, and Marine Sciences, University of Texas Rio Grande Valley, Edinburg, TX 78539, USA
Sang Hyun Kim: Department of Water Supply and Sewerage, Saman Corporation, Gwacheon-si 13837, Korea
I-Song Choi: Department of Environmental Application Science, Kyung Hee University, Yongin-si 17104, Korea
Kwang-Hyeon Chang: Department of Environmental Application Science, Kyung Hee University, Yongin-si 17104, Korea
Jong Min Oh: Department of Environmental Application Science, Kyung Hee University, Yongin-si 17104, Korea
Ki-Hyun Kim: Department of Civil and Environmental Engineering, 222 Wangsimni Ro, Hanyang University, Seoul 04736, Korea

Sustainability, 2017, vol. 9, issue 8, 1-8

Abstract: Artificial reservoirs are created by dike construction in coastal areas to secure the agricultural water supply on the west coast of South Korea. These systems are found to retain brackish characteristics until total desalination is achieved. To evaluate the effects of salinity on the organic substances released from the sediment, a laboratory water-sediment column experiment was conducted to assess associated changes in water quality variables such as the sediment oxygen demand (SOD), chemical oxygen demand (COD), and concentrations of nitrogen (N) and phosphorus (P). Under high salinity conditions, the release of N from the sediment was promoted with the enhancement of SOD and COD. This trend was accounted for by the response of the microorganisms (cell breakdown of algae and suppression of metabolic activity). Our results suggest that chemicals (N, P, and COD) released from sediment and its overall impact on the water quality of a brackish lake should vary depending on the temporal and spatial dynamics of the salinity.

Keywords: agricultural lake; organic substances; salinity; sediment oxygen demand (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2017
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