Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Analysis of the Effect of Dredging and Weirs on Bed Change in the Nakdong River and its Tributary using HEC-6

HEC-6를 이용한 준설 및 보로 인한 낙동강 본류 및 지류 하상변화 분석

  • Ahn, Jung Min (National Institute of Environmental Research, Nakdong River Environment Research Center) ;
  • Kwak, Sunghyun (Department of Civil Engineering, Changwon National University) ;
  • Lyu, Siwan (Department of Civil Engineering, Changwon National University)
  • 안정민 (국립환경과학원 낙동강물롼경연구소) ;
  • 곽성현 (창원대학교 토목공학과) ;
  • 류시완 (창원대학교 토목공학과)
  • Received : 2015.05.13
  • Accepted : 2015.07.22
  • Published : 2015.09.30
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Abstract

It is necessary to evaluate the effect of dredging and weir operation on the flow and long-term bed change for river management. Especially, large scale river treatment project, with dredging or weir installation and operation, can increase the instability of riverbed in tributaries as well as mainstream. This study focuses on the effect of weir installation and dredging on the long-term bed change in Nakdong river (Gangjeong- Goryeong Weir~Dalseong Weir) and its tributary (Geumho river). HEC-6 model has been used to analyze the amount of long-term bed change and sediment transport resulted from the river treatment including dredging or weir installation. From the result, it was concluded that a large scale river treatment can accelerate and increase the long-term bed change both in mainstream and tributary.

효과적인 하천관리를 위해서는 준설과 각종 수리구조물의 영향에 의한 하상변화 양상을 파악하고 평가하는 것이 필수적이다. 특히 대규모 준설과 대형수리구조물의 건설은 본류뿐만 아니라 지류의 하상안정에도 영향을 미칠 수 있다. 본 연구에서는 금호강이 유입하는 낙동강 강정고령보~달성보 구간에 대해 하도준설과 보 건설 및 운영에 따른 본류와 지류에서의 장기하상변동 영향을 살펴보고자 하였다. HEC-6모형을 이용하여 유사이송 및 장기하상변동 양상을 모의하였으며, 그 결과 준설 및 보 운영으로 인해 본류뿐만 아니라 지류에서도 하상변화량이 증가하고 가속화되었다.

Keywords

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