Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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An Analysis of the Variation in the Settling Properties of Cohesive Sediments before and after Closure of the Saemankeum Seadike

새만금 끝막이 공사 전후의 점착성 퇴적물의 침강특성 변화 해석

  • 양수현 (전북대학교 토목공학과) ;
  • 황규남 (전북대학교 토목공학과, 공업기술연구센터)
  • Published : 2008.08.28
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Abstract

The primary purpose of this study was to quantitatively examine whether there was a difference in the settling velocities of cohesive sediments in the Saemankeum artificial lake before and after the closure of the Saemankeum seadike. Through in situ sediment sampling and laboratory experiments, the settling velocities were estimated as a function of the suspension concentration and their physico-chemical properties, such as grain size distribution, the percentage of organic contents, mineralogical composition, etc. were also examined. In this study, their inter-relation with settling velocities were also analyzed qualitatively. The result of the settling tests for Saemankeum sediments showed that there was a big difference in the settling velocities before and after the closure of the Saemankeum seadike. Its settling velocities in a flocculated settling region became remarkably larger after the closure compared to those before the closure, while they were similar but relatively smaller in a hindered settling region. This was found to be mainly due to the difference in their grain size.

Keywords

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