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Open AccessArticle

Contribution of Internal Nutrients Loading on the Water Quality of a Reservoir

1
Center for Climate/Environment Change Prediction Research, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
2
Department of Health and Environment, Hallym Polytechnic University, 48, Janghak-gil, Dong-myeon, Chuncheon-si, Gangwon-do 24210, Korea
3
Agriculture and Life Sciences Research Institute, Kangwon National University, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do 24341, Korea
4
Department of Regional Infrastructure Engineering, Kangwon National University, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do 24341, Korea
5
Department of Environmental Science and Engineering, Ewha omans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
*
Author to whom correspondence should be addressed.
Water 2019, 11(7), 1409; https://doi.org/10.3390/w11071409
Received: 20 May 2019 / Revised: 5 July 2019 / Accepted: 5 July 2019 / Published: 9 July 2019
(This article belongs to the Special Issue GIS-Based Hydrology and Water Quality Modeling)
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Abstract

Sediment plays an important role in the water quality of a lake by acting as both a nutrient source and sink. The amount of phosphorus and nitrogen in the water depends on the internal load from the sediment as well as the external load. To estimate the effects of sediment load on the water quality of a reservoir, we applied a three-dimensional hydrodynamic and transport model based on the benthic chamber experimental results at Euiam Lake, South Korea. As shown in the sensitivity analysis results, the eutrophication period could be significantly extended by a change of phosphorus flux rates from the sediments. The increased phosphorus flux from the sediments intensifies the algal growth of Euiam Lake, which could cause serious algal bloom during spring and fall. This study provides information on nutrient concentrations in the sediment of Euiam Lake, verifies the role of the sediment as a source or sink of nutrients, and evaluates the effect of sediment release of nutrients and contaminants on water quality. This research is a useful tool in determining the effects of internal load in lakes and establishing the operation guideline for sediment management in order to maintain feasible water quality for beneficial use. View Full-Text
Keywords: eutrophication; sediment; internal load; benthic flux; water quality modeling eutrophication; sediment; internal load; benthic flux; water quality modeling
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Lee, H.W.; Lee, Y.S.; Kim, J.; Lim, K.J.; Choi, J.H. Contribution of Internal Nutrients Loading on the Water Quality of a Reservoir. Water 2019, 11, 1409.

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