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Estimation of Sediment Entering Daecheong Dam Considering Flood Season

  • Crisisonomy
  • Abbr : KRCEM
  • 2012, 8(3), pp.121-136
  • Publisher : Crisis and Emergency Management: Theory and Praxis
  • Research Area : Social Science > Public Policy > Public Policy in general

김진민 1,  Seungjin Maeng 2,  김형산 2,  김태우 2

1한국수자원공사
2충북대학교

Accredited

ABSTRACT

In this study, total sediment entering Daecheong lake was estimated using rating curve and flow-sediment curve interpolated by measured flow and sediment data in Ogcheon water level station upward Daecheong dam in Geum river basin. Sediments and flow data were observed 31 times in 2008~2009. Regarding to these data, the suspended load and the bed load were analyzed. Finally the total sediment was estimated by the Modified Einstein Procedure. Annual influx of sediments was estimated by using rating curve in Ogcheon water level station during 2001~2009 which is right after the operation of Yongdam dam located in the upstream of Daecheong dam. The result of total sediment which inflow in Daecheong lake is the following section and it was estimated by the rate of sediments per area in each drainage basins. The total sediment entering Daecheong lake is estimated 1,280,034 ton/yr using the rate of sediments per area (400 ton/㎢/yr) in Ogcheon water level station. The total sediment inflowing in Daecheong lake shows gap in comparison to 9 years estimated average sediments by 65% in 2001, 120% in 2002, 227% in 2003, 113% in 2004, 76% in 2005, 115% in 2006, 96% in 2007, 31% in 2008, 56% in 2009. The result shows that it was estimated fair comparing to the conventional estimated results which show gap up to 10 times the average sedimentation. Thus, the result in this study would be estimated for reliable amount of sediment entering Daecheong lake.

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