Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Estimation of Groundwater Quality and Background Level in Boseong Area, South Korea

보성지역 지하수의 배경 수질 및 오염 특성 분석

  • Moon, Sang-Ho (Climate Change Response Division, Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Lee, Jinwon (Department of Environmental Engineering, Kunsan National University) ;
  • Kim, Kangjoo (Department of Environmental Engineering, Kunsan National University) ;
  • Ju, Jeong-woung (Geogreen21)
  • 문상호 (한국지질자원연구원 기후변화대응연구본부 지하수환경연구센터) ;
  • 이진원 (군산대학교 환경공학과) ;
  • 김강주 (군산대학교 환경공학과) ;
  • 주정웅 ((주)지오그린21)
  • Received : 2022.01.13
  • Accepted : 2022.02.21
  • Published : 2022.02.28
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Abstract

The groundwater quality in Boseong area was characterized and their background concentrations were estimated based on the chemical data obtained from 200 groundwater samples collected during July 2019. Groundwater data were classified into two groups: Group 1 with NO3- < 44.3 mg/L and Group 2 with NO3- ≥ 44.3 mg/L. Results of t-tests indicate that groundwaters in Group 2 are significantly higher in water temperature and Ca concentration and significantly lower in F, As, Pb and Zn concentrations. It was also revealed that groundwaters Group 2 are closely linked to low pH, alkalinity, NH4, NO2, F, As, Fe, Mn, Pb and Zn levels, and high EC and water temperature. Background concentrations were estimated using the the BRIDGE method. The results depicted the higher levels in NO3, NH4, PO4, As, Fe, Mn than the ones estimated by MOE and KECO (2018; 2019), which were prepared for the three catchment units in Boseong. The results of this study are believed to have more reliability because more data were used.

2019년 7월에 얻어진 200개의 지하수 수질자료를 활용하여 보성지역 지하수의 수질 특성을 평가하고, 배경 수질을 도출하였다. 지하수는 질산성질소 농도를 기준으로 Group 1(NO3- < 44.3 mg/L)과 Group 2(NO3- ≥ 44.3 mg/L)로 구분하였다. t-test 결과, Group 2는 Group 1에 비해 유의성 있게 수온과 Ca 농도가 높았고, F, As, Pb, Zn 등의 농도는 낮게 나타났다. 질산염 농도가 높은 경우에는 낮은 pH, 알칼리도, NH4, NO2, F, As, Fe, Mn, Pb, Zn 등의 농도를 보였으며, EC 및 수온은 높아지는 경향을 보였다. 한편, 배경농도는 BRIDGE 방법으로 설정하였다. 본 연구에서 설정된 NO3, NH4, PO4, As, Fe, Mn 항목들에 대한 배경농도 값들은 기존의 환경부 보고서(MOE and KECO, 2018; 2019)에 제시된 중권역별 배경농도 산정 결과보다는 다소 높게 설정되었다. 본 연구에 이용된 수질자료의 수가 훨씬 많다는 점을 감안하면, 본 연구에서 산출된 배경수질 자료의 신뢰성이 더 높은 것이라 판단된다.

Keywords

Acknowledgement

이 연구는 국가과학기술연구회 창의형 융합연구사업(CAP-17-05-KIGAM)의 지원을 받아 수행되었습니다. 이 논문은 환경부의 "보성지역 통합 지하수 기초조사" 보고서 및 부록에 수록된 자료를 주로 활용하였으며, 이 논문을 심사하여 주신 익명의 심사위원들께 감사의 말씀을 드립니다.

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