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2021 Vol.26, Issue 6 Preview Page
Assessment of Groundwater Quality on a Watershed Scale by Using Groundwater Quality Monitoring Data

지하수수질측정망 자료를 이용한 유역단위 지하수 수질등급 평가

Jeong Jik Kim1
,
Yunjung Hyun1*
김정직 1
,
현윤정 1*
1 Water and Land Research Group, Korea Environment Institute, Sejoung 30147, South Korea
1 한국환경연구원 물국토연구본부
*Corresponding Author
31 December 2021. pp. 186-195
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Abstract

In Korea, groundwater quality is monitored through National Groundwater Quality Monitoring Network (NGQMN) administered by Ministry of Environment. For a given contaminant, compliance to groundwater quality standards is assessed on a annual basis by monitoring the number of incidents that concentration exceeds the regulatory limit. However, this approach provides only a fractional information about groundwater quality degradation, and more crucial information such as location and severity of the contamination cannot be obtained. For better groundwater quality management on a watershed, a more spatially informative and intuitive method is required. This study presents two statistical methods to convert point-wise monitoring data into information on groundwater quality status of a watershed by using a proposed grading scale. The proposed grading system is based on readily available reference standards that classify the water quality into 4 grades. The methods were evaluated with NO 3- , Cl - , and total coliform data in Geum River basin. The analyses revealed that groundwater in most watersheds of Geum River basin is good for domestic or/and drinking with no treatment. But, there was notable quality degradation in Bunam seawall and So-oak downstream standard watersheds contaminated by NO 3- and Cl - , respectively.

Keywords
groundwater quality monitoring network
grading system
watershed scale
statistical method
Geum-river basin
References

References

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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 26
  • No :6
  • Pages :186-195
  • Received Date : 2021-12-15
  • Revised Date : 2021-12-16
  • Accepted Date : 2021-12-20
  • DOI :https://doi.org/10.7857/JSGE.2021.26.6.186
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