Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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Analysis of Water Quality Improvement Effect by Securing Water Quality Characteristics and Flow Rate in the Geumho River

금호강 수질특성 및 유량확보에 따른 수질개선 효과 분석

  • Kwak, Insoo (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Choi, Boram (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Jeon, Hyeryn (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Kim, Sunae (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Bae, Jaehyeong (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Kim, Shin (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Kim, Jungmin (Nakdong River Environment Research Center, National Institute of Environmental Research)
  • 곽인수 (국립환경과학원 낙동강물환경연구소) ;
  • 최보람 (국립환경과학원 낙동강물환경연구소) ;
  • 전혜린 (국립환경과학원 낙동강물환경연구소) ;
  • 김선애 (국립환경과학원 낙동강물환경연구소) ;
  • 배재형 (국립환경과학원 낙동강물환경연구소) ;
  • 김신 (국립환경과학원 낙동강물환경연구소) ;
  • 김정민 (국립환경과학원 낙동강물환경연구소)
  • Received : 2020.09.16
  • Accepted : 2020.11.04
  • Published : 2020.12.31
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Abstract

For the management of rivers, the target water quality is set by establishing the total amount of water pollution and water environment basic plan. For Geumho river T-P has achieved the target water quality, but for BOD, COD, TOC the target water quality of the water environment basic plan has been exceed for the past five years. Therefore, the flow rate for satisfying the target water quality was simulated by analyzing the load, load density, and pollution contribution rate of the Geumho river using BOD, COD, TOC and by utilizing QUAL-MEV a one-dimensional water quality model. According to the analysis of the load, the BOD, COD and TOC all showed the highest levels at the Geumho C point at 9,832.2 kg/day 20,656.6 kg/day, and 15,545.1 kg/day. The load density was highest at 9.47 kg/day/㎢, 37.55 kg/day/㎢, 30.20 kg/day/㎢, and 17.19 kg/day/㎢, 39.14 kg/day/㎢ in Dalseocheon stream during the wet seasons and dry seasons. Pollution contribution rate was highest at about 25 percent for Palgeocheon stream during the wet season and about 50 percent for Dalseocheon stream during the dry season. In addition, the correlation analysis between organic materials showed in the main stream and tributaty of the Geumho river that COD-TOC was 0.8 or higherthan BOD-COD and BOD-TOC in both the wet seasons and dry seasons. And after surveying the total amount of water pollution and the target quality of the water environment basic plan at Geumho C, it was analyzed that an additional flow tate of 14 times and 22 times was needed as of April 2019 (3.46 ㎥/sec).

하천의 관리를 위하여 수질오염총량 및 물환경기본계획을 수립하여 목표수질을 설정하고 있으며 금호강의 경우 T-P는 목표수질을 달성하고 있으나 BOD, COD, TOC의 경우 지난 5년간 물환경기본계획 목표수질을 초과하였다. 이에 금호강을 대상으로 BOD, COD, TOC를 이용하여 유달부하량 및 유달부하밀도, 오염기여율을 분석하고 수질오염총량관리에서 사용하고 있는 1차원 수질모델인 QUAL-MEV를 활용하여 목표수질 만족을 위한 필요유량을 모의하였다. 유달부하량을 분석한 결과 금호C 지점에서 BOD, COD, TOC 모두 9,832.2 kg/day, 20,656.6 kg/day, 15,545.1 kg/day로 가장 높게 나타났으며, 유달부하밀도는 강우기 및 비강우기에 달서천에서 9.47 kg/day/㎢, 37.55 kg/day/㎢, 30.20 kg/day/㎢과 17.19 kg/day/㎢, 47.59 kg/day/㎢, 39.14 kg/day/㎢로 가장 높게 나타났다. 오염기여율은 강우기에 팔거천이 약 25%, 비강우기에 달서천이 모든 항목에서 약 50%로 가장 높게 나타났다. 또한 금호강본류 및 지류 유기물질간의 상관관계 분석을 수행한 결과 비강우기, 강우기 모두 COD-TOC가 0.8 이상으로 BOD-COD, BOD-TOC보다 상관관계가 높게 나타났다. 그리고 금호C 지점에서 수질오염총량 및 물환경기본계획 목표수질을 만족하기 위한 유량을 조사한 결과 2019년 4월(3.46 ㎥/sec)을 기준으로 약 14배, 22배의 추가유량이 필요한 것으로 분석되었다.

Keywords

Acknowledgement

본 논문은 환경부의 제원으로 국립환경과학원의 지원을 받아 수행하였습니다(NIER-2020-05-01-001).

References

  1. Bowie GL, Mille W, Porcella D, Campbell C, Pagenkopf J, Pupp G, Johnson K, Chan P, Gherini S. 1985. Rates, constants and kinetic formulations in surface water quality modeling (2nd Ed.). Usepa/600/385/040.
  2. Brown L, Barnwell T. 1987. The enhanced stream water quality models QUAL2E: Documentation and user's manual. USEPA.
  3. Cho BW, Choi JH, Yi SJ, Kim YI. 2012. Selection priority of triburary catchments for improving water quality using stream grouping method. Journal of Korean Society on Water Environment. 28(1): 18-25. [Korean Literature]
  4. Cho HK. 2011. A study on the related characteristics of discharge-water quality in nakdong river. Journal of Environmental Science. 20(3): 373-384. [Korean Literature]
  5. Cho HS, Son JY, Kim GD, Shin MC, Cho YC, Shin KS, Noh HR. 2019. Non-parametric Trend Analysis Using Long-term Monitoring Data of Water Quality in Paldang Lake. Journal of Environment Impact Assess. 28(2): 83-100. [Korean Literature] https://doi.org/10.14249/EIA.2019.28.2.83
  6. Cho KS. 2016. The contribution of the contaminant sources in the dam of the Nam river downstream and the evaluation of the water quality in the Nakdong River mainstream. Master's Thesis. Pukyong National University, Pusan. [Korean Literature]
  7. Choi BD. 2004. The Function or Urban River and Sustainable Regional Development; The Case of Kumho River. Journal of Korean Association of Regional Geographers. 10(4): 757-774. [Korean Literature]
  8. Choi BG. 2003. Pollution Load Allocation for Total Pollution Load Management. Master's Thesis. Hanyang University, Seoul. [Korean Literature]
  9. Donigian AS. 2000. HSPF Training Workshop Handbook and CD, Lecture #19, Calibration and Verification Issues, Side #L19-22 EPA Headquarters, Washington Information Center, Presented and Prepared for U.S. EPA, Office of Water, Office of Science and Technology, Washington, D.C., USA.
  10. Hwang BG, Jeong HJ. 2002. The Management Planning of Pollutant Loading Allocation in the Kumho River Basin. Journal of Environmental Sciences. 11(10): 1125-1131. [Korean Literature] https://doi.org/10.5322/JES.2002.11.10.1125
  11. Jung KY, Im TH, Kim GH, Lee IJ, Yoon JS, Heo SN. 2012. Development and application of coliform load duration curve for the Geumho river. Journal of Korean Society on Water Environment. 28(6): 890-895. [Korean Literature]
  12. Jung KY, Kim GH, Lee JW, Lee IJ, Yoon JS, Lee KL, Lim TH. 2013. Selection of priority management target tributary for effective watershed management in Namriver Mid- watershed. Journal of Korean Society on Water Environment. 29(4): 514-522. [Korean Literature]
  13. Jung KY, Ahn JM, Lee KL, Lee IJ, Yu JJ, Cheon SU, Kim KS, Han KY. 2015. Temporal and Spatical Analysis of Non-biodegradable Organic Pollutants in the Geumho River System. Journal of Environmental Science International. 24(11): 1343-1362. [Korean Literature] https://doi.org/10.5322/JESI.2015.24.11.1343
  14. Jung KY, Ahn JM, Kim KS, Lee IJ, Yang DS. 2016. Evaluation of water quality characteristics and water quality improvement grade classificaton of Geumho River tributaries. Journal of Environmental Science International. 25(6): 514-522. [Korean Literature]
  15. Kim GH, Jung GY, Yoon JS, Cheon SU. 2013. Temporal and Spatial Analysis of Water Quality Data Observed in Lower Watershed of Nam River Dam. Journal of Korean Society Hazzard Mitigation. 13(6): 429-437. [Korean Literature] https://doi.org/10.9798/KOSHAM.2013.13.6.429
  16. Kim SG, Cha GS. 2011. Effect of water quality improvement with secure instream flow in Yeongsan River. Journal of Green Industrial Research. Honam University. 17(2): 45-51. [Korean Literature]
  17. Kim SR, Kim SM. 2017. Spatial water quality analysis of main stream of nakdong river considering the inflow of tributaries. Journal of Korean Society on Water Environment. 33(6): 640-649. [Korean Literature] https://doi.org/10.15681/KSWE.2017.33.6.640
  18. Kim YK, Choi GW, Ham MS, Kim NW. 2008. The analysis of potential discharge by dam in Han River basin at dry season. Journal of Korean Society Water Resources Association. 41(11): 1143-1152. [Korean Literature] https://doi.org/10.3741/JKWRA.2008.41.11.1143
  19. K-water. 2019. Water Management Working-level manual. [Korean Literature]
  20. Lee AY, Park MJ, Jo DJ, Kim SD. 2010. Estimating BOD, COD and TOC hydrologic flux in Nakdong River basin. Journal of Korean Society Environmental Engineers. 32(9): 830-839. [Korean Literature]
  21. Lee SM, Kim IK. 2017. Analysis of correlation between cyanobacterial population and water quality factors in the middle and down stream region of Nakdong river. Journal of Korea Society of Water and Wastewater. 31(1): 93-101. [Korean Literature] https://doi.org/10.11001/jksww.2017.31.1.093
  22. Lee SR, Shin JY, Lee GJ, Sung YS, Kim KS, Lim KJ, Kim JG. 2018. Analysis of water pollutant load characteristics and its contributions during dry season: Focusing on major streams inflow into South-Han River of Chungju-dam downstream. Journal of Korean Society Environmental Engineers. 40(6): 247-257. [Korean Literature] https://doi.org/10.4491/KSEE.2018.40.6.247
  23. Lee SR, Lee GJ, Han JH, Lee DJ, Kim JG, Lim KJ. 2019. Analysis fo the effect of water quality improvement of Seomgang and south Han River by securing the flow during the dry season. Journal of the Korean Society of Agricultural Engineers. 61(2): 25-39. [Korean Literature] https://doi.org/10.5389/KSAE.2019.61.2.025
  24. Lyu JH, Lee DG. 2007. Inquiry of Water Environment in Mihocheon(Stream) - Water Quality Monitoring Focused on TOC -. Journal of Korean Society on Water Quality. 23(5): 731-739. [Korean Literature]
  25. Ministry of Environment (MOE). 2000. Yesterday, Today and Future of Geumho River, Ministry of Environment, 6-9. [Korean Literature]
  26. Ministry of Environment (MOE). 2015. Total Maximum Daily Loads (TMDL) Basic Plan in Nakdong River Watershed. [Korean Literature]
  27. Ministry of Environment (MOE). 2020. Management Plan of Water Environment of Sub-watershed in Lower Geumho River, 25. [Korean Literature]
  28. Na SM, Kwon HG, Kim GH, Shin DS, Im TH. 2016. Analysis of specific contaminated status and pollutant loads contriution rate of the tributaries in Gumho and Nam River basin. Journal of Wetlands Research. 18(4): 363-377. [Korean Literature] https://doi.org/10.17663/JWR.2016.18.4.363
  29. Park JD, Oh SY. 2012. Countributions to the impaired water bodies by hydrologic conditions for the management of total maximum daily loads. Journal of Korean Society on Water Environment. 28(4): 574-581. [Korean Literature]
  30. Park SC, Lee JW, Choi GW, Oh JM, Kim YG. 2003. Effect of water quality improvement with secure instream flow in urban stream. The Conference of Korean Society of Civil Engineers. 2448-2452. [Korean Literature]
  31. Seo DI, Yun JU, Lee JW. 2008. Comparative anlysis of QUAL2E, QUAL2K and CAP steady state water quality modeling results in downstream areas of the Geum River, Korea. Journal of Korean Society of Water and Wastewater. 22(1): 121-129. [Korean Literature]
  32. U.S. Army Corps of Engineers (USACE) 2016. HEC-RAS River analysis sistem users manual.
  33. Yang DS, Bae HK. 2012. The effect of branches on Kumho River's water quality. Journal of Environmental Sciences. 21(10): 1245-1253. [Korean Literature] https://doi.org/10.5322/JES.2012.21.10.1245
  34. Yi SJ, Kim YI. 2014. Improvement on Management of Non-point Source Pollution for Reasonable Implementation of TMDL - Focusing on Selection of Non-point Source Pollution Management Reagion and Management of Non-point Source Pollutant -. Journal of Korean Society Environmental Engineers. 36(10): 719-723. [Korean Literature] https://doi.org/10.4491/KSEE.2014.36.10.719
  35. Yoon YS, Yu JJ, Kim MS, Lee HJ. 2006. Computation and Assessment of Delivery Pollutant Loads for the Streams in the Nakdong River Basin. Journal of Korean Society on Water Quality. 22(2): 277-287. [Korean Literature]