The Journal of Engineering Geology (지질공학)

The Korean Society of Engineering Geology (대한지질공학회)
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Hydrochemical Properties of the Onyang Hot Spring Waters

온양지역 온천수의 수리화학적 특성

  • Yun, Uk (Groundwater & Ecohydrology Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Cho, Byong Wook (Groundwater & Ecohydrology Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Cholwoo (Center for Deep Subsurface Research, Korea Institute of Geoscience and Mineral Resources)
  • 윤욱 (한국지질자원연구원 지하수생태연구센터) ;
  • 조병욱 (한국지질자원연구원 지하수생태연구센터) ;
  • 이철우 (한국지질자원연구원 심지층연구단)
  • Received : 2016.12.09
  • Accepted : 2016.12.30
  • Published : 2016.12.30
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Abstract

For the investigation of hydrochemical changes in hot spring waters from the Onyang hot spring area, we analyzed water chemistry of 24 hot spring waters in 2011 and 2016. The results showed that there is no significant change in temperature and properties of the hot spring waters. The relationship of 2016 between temperature and $SiO_2$ and F reveals a positive trend ($r^2=0.60$, 0.47), and the relationship between temperature and Ca, Mg, Cl, $SO_4$, $HCO_3$, EC reveals a negative trend ($r^2=0.50$, 0.11, 0.50, 0.63, 0.23, 0.51). The relationship between temperature and pH is a positive trend, while the one between temperature and DO is a negative trend, indicating that the source is from deep groundwater. When plotted on Piper diagram, most of which are $Na-HCO_3$ but several hot waters are classified as the $Na(Ca)-HCO_3$, indicating inflow of shallow groundwater was occurred.

온양지역 온천수의 수질특성을 파악하기 위하여 2011년과 2016년에 24개 온천수의 수질을 분석한 결과 5년 동안 수온과 수질에는 큰 변화가 없었다. 2016년 온천수의 수온과 $SiO_2$, F와는 정의 상관관계($r^2=0.60$, 0.47)를, Ca, Mg, Cl, $SO_4$, $HCO_3$, EC와는 부의 상관관계($r^2=0.50$, 0.11, 0.50, 0.63, 0.23, 0.51)를 나타낸다. 온천수의 수온과 pH는 양의 상관관계, DO와는 음의 상관관계를 보여 온양지역 온천수는 심부 기원임을 지시한다. 온천수 수질 유형은 대부분이 심부기원인 $Na-HCO_3$ 형으로 분류되나 일부 온천공은 $Na(Ca)-HCO_3$ 형으로도 분류되어 천부 지하수의 유입특성도 보인다.

Keywords

References

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