Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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A Study on the Spatial Variation of Target Water Quality and Excess Rate at 41 Stations in Nakdong River Basin after the Total Maximum Daily Loads

수질오염총량제 시행 이후 낙동강수계 41개 지점의 BOD와 T-P의 목표수질과 초과율의 공간변화 분석

  • Cho, Hyun kyung (Department of Agricultural Engineering, Gyeongsang National University) ;
  • Kwak, Eun Tae (Department of Agricultural Engineering, Gyeongsang National University) ;
  • Kim, Sang Min (Department of Agricultural Engineering (Insti. of Agric. and Life Sci.), Gyeongsang National University)
  • Received : 2020.10.08
  • Accepted : 2020.10.27
  • Published : 2020.11.30
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Abstract

The objective of this study was to assess spatial variation of the target water quality criteria and excess rate in Nakdong river basin after the Total Maximum Daily Loads (TMDLs). For this, 41 total water quality monitoring stations were selected BOD and T-P data were collected from 2003 to 2019. The annual average water quality of BOD and T-P were calculated and compared with the target water quality for each stations by peroid. As a result of analyzing the BOD, Kumho A, Nakbon F, Namgang D, Miryang B, Wicheon B and Hoecheon A exceeded the target water quality criteria for two consecutive times. For T-P, Nakbon N, Naeseung B, Miryang A, Hwanggang A and Hoecheon A exceeded the target water quality criteria twice in a row. In the case of T-P, the target water quality excess rate was relatively low after the TMDLs implementation compared to before the TMDLs implementation. However, in the case of BOD, there was no difference in the target water quality excess rate before and after TMDLs. As a result, the overall annual average water quality shows a decreasing trend, but it is necessary to manage the water quality for the Nakdong river basin that exceed the target water quality.

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References

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