Hydraulic conductivity is an important parameter in the analytical model of groundwater. This study analyzed the groundwater movement characteristics by estimating optimal parameters according to hydraulic conductivity input methods with the MODFLOW model which is widely used. It first estimated the optimal parameters by dividing hydraulic conductivity zones by attitude. Next, it estimated optimal parameters by geological characteristic. It analyzed the groundwater movement characteristics by applying the recharge quantity and amount of evapotranspiration of drought periods and flood years with the estimated parameters.
As the result was analyzed that there are differences of observation water level values according to hydraulic conductivity input methods but there is no big differences of overall groundwater movement characteristics by hydraulic conductivity input method, the two methods have found to be applicability in analyses of groundwater. So, it is judged that studies on more exact application of hydraulic conductivity and the application methods are needed.

Abstract
 1. 서 론
 2. 지하수유동 모형의 기본이론
 3. 모형의 적용 및 입력자료
  3.1. 연구대상유역 선정 및 초기 모형매개변수 설정
  3.2. 투수계수 적용방식에 따른 매개변수 추정
  3.3. 투수계수 적용방식 별 지하수 유동특성
  3.4. 갈수기, 풍수기 지하수 유동특성
 4. 결론
 REFERENCE

• 안승섭(경일대학교 건설공학부) | Seung-Seop Ahn (School of Construction Engineering, Kyungil University)
• 박동일(제주국제대학교 토목공학과) | Dong-Il Park (School of Civil Engineering, Jeju International University) Corresponding author