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

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2021, 30(6), pp.355-360
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering
  • Received : October 21, 2021
  • Accepted : November 24, 2021
  • Published : December 30, 2021

Jihyeok Im 1 Dong Soo Kong ORD ID 1

1경기대학교

Accredited

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.

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