KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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A Study on the Effect of Dredging and Operation of Weirs on Hydraulic Characteristics in Nakdong River

낙동강 수계 준설 및 수리시설물 운영에 따른 흐름특성 연구

  • 안정민 (창원대학교 공과대학 토목공학과) ;
  • 류시완 (창원대학교 공과대학 토목공학과)
  • Received : 2013.03.06
  • Accepted : 2013.07.03
  • Published : 2013.09.30
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Abstract

It is essential to understand the hydraulic characteristics in accordance with the changes in the river environment and operating hydraulic structures for increasing flood-control capacity. The objective of this study is to analysis the effect of dredging and operation of weirs on hydraulic characteristics in Nakdong River(Seongju~Imhaejin). HEC-RAS model has been used to examine the hydraulic characteristics with considering the flow transition through the unsteady flow analysis and the information about the specifications of multi-functional weirs. The relationship between Manning n and roughness height k, the effect of weir installation and operation on the flow and stage, and the bed change resulted from the river treatment project have been examined by steady and unsteady flow analysis. It is expected that the result from this study can be the basic data for the river treatment and management.

수리구조물의 효과적 운영과 홍수기 피해저감을 위해서는 하천수리특성에 대한 적절한 이해가 필수적이기 때문에 본 연구에서는 낙동강 수계 금호강 유입지점 하류를 대상으로 준설 및 수리시설물 운영에 따른 수리특성 영향을 분석하였다. 수리특성 분석을 위해 HEC-RAS 모형을 이용하였으며, 부정류 흐름 해석을 통해 흐름의 천이를 반영하고 수리시설물 운영을 위한 다기능보 제원을 적용하였다. 조도계수와 조고값의 관계, 정류와 부정류 흐름해석, 사업 전과 후 하천 단면 그리고 다기능보 운영에 따른 하천 흐름에 대해 다각도로 연구를 하였다. 낙동강 수계 주요 관심구간을 중심으로 급격한 지형변화 및 수리구조물 운영에 의한 홍수에 대비하고 주요지점별 유량 전달에 의한 홍수파에 대해 분석된 자료는 합리적인 하천관리를 위한 기초자료로 활용될 수 있을 것이다.

Keywords

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  1. Analysis of Storage and Flood Control Effects by Underflow Type of Multi-stage Movable Weir vol.3, pp.4, 2016, https://doi.org/10.17820/eri.2016.3.4.294
  2. Operation of Estuary Barrage and Weirs in the Nakdong River during the Flood Period vol.14, pp.4, 2014, https://doi.org/10.9798/KOSHAM.2014.14.4.289