Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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An Assessment of Flow Characteristic and Riverbed Change by Construction of Hydraulic Structure

수리구조물 설치에 따른 흐름특성 및 하상변동 연구

  • Kwak, Jaewon (Nakdong Flood Control Office, Ministry of Land, Infrastructure and Transport) ;
  • Jin, Hwansuk (Hydrological Survey Center) ;
  • Kim, Hung Soo (Department of Civil Engineering, Inha university)
  • Received : 2017.10.31
  • Accepted : 2017.11.16
  • Published : 2017.11.30
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Abstract

The estimations of flow characteristics and river-bed erosion or sedimentation are very important for hydraulic structure design, floodplain management, and especially, river management. The objective of the study is therefore to estimate the change of flow characteristics and river-bed change due to a hydraulic structure construction. With 11.65 km study area of the Geum River which are located in downstream of Daecheong Dam, flow characteristics and river-bed change were estimated based on the RMA2 and SED2D model. As the result of the study, the increase of river-bed sedimentation in upstream and river-bed erosion in downstream were occurred by the construction of hydraulic structure.

흐름특성과 하상변동의 추정은 하천유역 내 수리구조물의 설계 및 유지관리, 홍수터 관리, 하천개수 및 하도의 안정 등을 위한 기본적인 요소이며, 하천관리에 직접적인 영향을 미친다. 이에 본 연구의 목적은 하도 내에 수리구조물 설치에 따른 흐름의 특성과 그에 따른 하상변동을 추정하는 데 있다. 이를 위하여 금강 대청댐 하류부 11.65km 구간을 대상으로 RMA2 모형 및 SED2D 모형을 이용하여 수리구조물의 신설로 인한 흐름특성의 변화와 빈도별 홍수량에 따른 하상변동을 모의하였다. 연구결과, 수리구조물 설치로 인해 상류부에서는 하상 상승, 하류부에서는 보 설치전과 유사한 형태의 침식이 발생하는 것으로 나타났다.

Keywords

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