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http://dx.doi.org/10.14249/eia.2021.30.6.355

Analysis of Water Quality and Aquatic Ecosystem Improvement Effect According to TMDL in Jinwi River Watershed  

Im, Jihyeok (Department of Life Science, Kyonggi University)
Kong, Dongsoo (Department of Life Science, Kyonggi University)
Publication Information
Journal of Environmental Impact Assessment / v.30, no.6, 2021 , pp. 355-360 More about this Journal
Abstract
As the domestic water management policy shifted from concentration-oriented water management to load management-centered Total Maximum Daily Load (TMDL), water quality and aquatic ecosystems brought changed. However, it was difficult to determine whether the water quality and the health of the aquatic ecosystem improved after the implementation of the TMDL due to changes in pollutant sources and discharge fluctuations ect, so the effect was analyzed using a log-linear model and biological indicators (Benthic Macroinvertebrates). As a result, BOD and T-P concentrations in the Jinwi River Watershed were reduced by 30% and 35%, showed the effect of improving water quality, however the benthic macroinvertebrates index (BMI) downgraded from grade D to grade E. Therefore, efforts to cultivate ecologicalrivers are necessary to upgrade the health of the aquatic ecosystem in the river watershed.
Keywords
TMDL; Jinwi River Watershed; water quality improvement; Benthic Macroinvertebrates Index;
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