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The Variation of Oxygen and Hydrogen Isotopic Composition in Precipitation and Geothermal Waters from the Yuseong Catchment  

Moon, Sang-Ho (Groundwater and Geothermal Resources Division, Korea Intitute of Geoscience and Mineral Resources (KIGAM))
Cho, Sung-Hyeon (Groundwater and Geothermal Resources Division, Korea Intitute of Geoscience and Mineral Resources (KIGAM))
Lee, Kwang-Sik (Korea Basic Science Institute(KBSI))
Yun, Uk (Groundwater and Geothermal Resources Division, Korea Intitute of Geoscience and Mineral Resources (KIGAM))
Publication Information
Economic and Environmental Geology / v.40, no.4, 2007 , pp. 389-401 More about this Journal
Abstract
The oxygen and hydrogen isotopic composition in precipitation, groundwater and geothermal water were monitored over four-year period from 2001 to 2004 at the Yuseong catchment, Daejeon. By analyzing the long term rainfall pattern, we found out the drought cycle of 6 or 7 year. We fortunately revealed that the oxygen and hydrogen isotopic composition of rain has progressively changed to heavier isotopic ratios from 2001 to 2004. The weighted mean values of ${\delta}^{18}O\;and\;{\delta}D$ of rain are calculated to be $-7.7%o\;and\;-51%o$, respectively. These isotopic values are much heavier than those of groundwater and geothermal water collected at the same period, which indicates that the rain or snow of the study area would not immediately affect the isotopic composition of groundwater or geothermal water. Comparing with the previous data, the groundwater and geothermal water collected at 1990 and 1992 year has the heaviest isotopic composition and afterwards their isotopic composition has been progressively shifted to the direction of lighter composition field.
Keywords
Yuseong catchment; Rainfall; Groundwater; Geothermal water; Variation of oxygen and hydrogen isotopic composition;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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