Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Natural and Artificial Bed Change Analysis through Sediment Budget Analysis of Nakdong River Channel (before the Four Rivers Restoration Project)

낙동강 하도의 유사수지 분석을 통한 자연적 그리고 인위적 하상변동 분석(4대강살리기 사업 이전)

  • Son, Kwang Ik (Dept. of Civil Engrg., Yeungnam Univ.) ;
  • Ji, Un (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
  • 손광익 (영남대학교 공과대학 건설시스템공학과) ;
  • 지운 (한국건설기술연구원 수자원.하천 연구소)
  • Received : 2014.10.30
  • Accepted : 2014.12.05
  • Published : 2015.01.31
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Abstract

General features of sediment budget for the Nakdong River before the Four Rivers Restoration Project were analyzed using surveying, dredging, and mining data for the past 20 years, as well as sediment data measured from the tributaries, and numerical modeling, etc. As a result of the sediment budget analysis of the Nakdong River before the Four Rivers Restoration Project, sediment inflow supplied from the watershed is $2,100,000m^3/yr$ and sediment outflow including mining and dredging volumes is $10,180,000m^3/yr$. Therefore, the bed change volume estimated by the sediment budget analysis is $-8,080,000m^3/yr$ of the bed erosion volume which is similar to the analysis result ($-8,300,000m^3/yr$) of natural and artificial bed changes using the surveyed data.

본 논문에서는 지난 20여 년간의 낙동강 하상변동 자료와 준설 및 골재채취 자료, 그리고 지류로부터 유입되는 유사량 관측 자료 및 수치모의 자료 등을 조사, 검토, 분석하여 4대강살리기 사업 전의 낙동강 하도에서의 개괄적인 유사수지 특성을 분석하였다. 4대강살리기 사업 전 낙동강 하도의 유사수지분석 결과, 유역에서 하도로 유입된 유사량은 $2,100,000m^3/yr$이며 낙동강으로부터 유출 또는 준설된 유사유출 총량은 $10,180,000m^3/yr$인 것으로 나타났다. 따라서 유사수지 분석을 통해 산정된 낙동강 하도에서의 하상변동량은 $-8,080,000m^3/yr$으로 하상이 침식된 것으로 나타났으며 이는 실제 하도측량 자료 분석을 통해 도출된 낙동강 본류의 자연적 그리고 인위적인 하상변동량($-8,300,000m^3/yr$)과 유사한 것으로 나타났다.

Keywords

References

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