Abstract
The stable isotopes of oxygen and hydrogen were used to determine the seasonal contributions of precipitation to groundwater recharge at a forested catchment area in the upper North Han River basin, Korea. A comparison of the stable isotopic signatures of groundwater and precipitation indicates that the precipitations which occurred during both the dry and rainy seasons are the important source of groundwater recharge in this region. A stable isotopic signature shown in the stream waters at the upstream reaches is similar to that of groundwaters, indicating that stream waters are mostly fed by groundwater discharge. Reservoir waters in the downstream flood control dams have lower deuterium excess values or d-values compared with those of the upstream waters, indicating a secondary evaporative enrichment. These results can provide a basis for the effective management of groundwater and stream water resources in the North Han River basin.
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This work was supported by KBSI grant (N26052) to K. S. Lee.
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Lee, KS., Kim, Y. Determining the seasonality of groundwater recharge using water isotopes: a case study from the upper North Han River basin, Korea. Environ Geol 52, 853–859 (2007). https://doi.org/10.1007/s00254-006-0527-3
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DOI: https://doi.org/10.1007/s00254-006-0527-3