Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Estimation of CN-based Infiltration and Baseflow for Effective Watershed Management

효과적인 유역관리를 위한 CN기법 기반의 침투량 산정 및 기저유출량 분석

  • Kim, Heewon (Department of Regional Infrastructure Engineering Program, Kangwon National University) ;
  • Sin, Yeonju (Department of Regional Infrastructure Engineering Program, Kangwon National University) ;
  • Choi, Jungheon (Department of Regional Infrastructure Engineering Program, Kangwon National University) ;
  • Kang, Hyunwoo (Department of Regional Infrastructure Engineering Program, Kangwon National University) ;
  • Ryu, Jichul (Department of Regional Infrastructure Engineering Program, Kangwon National University) ;
  • Lim, Kyoungjae (Department of Regional Infrastructure Engineering Program, Kangwon National University)
  • 김희원 (강원대학교 지역건설공학과) ;
  • 신연주 (강원대학교 지역건설공학과) ;
  • 최정헌 (강원대학교 지역건설공학과) ;
  • 강현우 (강원대학교 지역건설공학과) ;
  • 류지철 (강원대학교 지역건설공학과) ;
  • 임경재 (강원대학교 지역건설공학과)
  • Received : 2011.01.14
  • Accepted : 2011.05.12
  • Published : 2011.07.30
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Abstract

Increased Non-permeable areas which have resulted from civilization reduce the volume of groundwater infiltration that is one of the important factors causing water shortage during a dry season. Thus, seeking the efficient method to analyze the volume of groundwater in accurate should be needed to solve water shortage problems. In this study, two different watersheds were selected and precipitation, soil group, and land use were surveyed in a particular year in order to figure out the accuracy of estimated infiltration recharge ratio compared to Web-based Hydrograph Analysis Tool (WHAT). The volume of groundwater was estimated considering Antecedent soil Moisture Condition (AMC) and Curve Number (CN) using Long Term Hydrologic Impact Assessment (L-THIA) model. The results of this study showed that in the case of Kyoung-an watershed, the volume of both infiltration and baseflow seperated from WHAT was 46.99% in 2006 and 33.68% in 2007 each and in Do-am watershed the volume of both infiltration and baseflow was 33.48% in 2004 and 23.65% in 2005 respectively. L-THIA requires only simple data (i.e., land uses, soils, and precipitation) to simulate the accurate volume of groundwater. Therefore, with convenient way of L-THIA, researchers can manage watershed more effectively than doing it with other models. L-THIA has limitations that it neglects the contributions of snowfall to precipitation. So, to estimate more accurate assessment of the long term hydrological impacts including groundwater with L-THIA, further researches about snowfall data in winter should be considered.

Keywords

References

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