Journal of Korean Society of Coastal and Ocean Engineers (한국해안해양공학회지)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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An Experimental Study for Estimation of Erosion Rate of Fine Cohesive Sediments

미세-점착성 퇴적물의 침식률 산정을 위한 실험적 연구

  • Hwang Kyu-Nam (RCIT, Dept. of Civil Engineering, Chonbuk National University) ;
  • So Sang-Don (RCIT, Dept. of Civil Engineering, Chonbuk National University) ;
  • Kim Tae-Min (RCIT, Dept. of Civil Engineering, Chonbuk National University)
  • 황규남 (전북대학교 토목공학과, 공업기술연구센터) ;
  • 소상돈 (전북대학교 토목공학과, 공업기술연구센터) ;
  • 김태민 (전북대학교 토목공학과, 공업기술연구센터)
  • Published : 2005.06.01
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Abstract

An annular flume has been constructed in order to estimate the erosion rate of fine cohesive sediments. Under an uniform bed condition, some erosion tests for Kaolinite sediments have been conducted to examine the performance of the flume and to check the validity of experimental method and results. In this study, the critical shear stress for erosion and the erosion rate coefficient are estimated and compared with the existing measurements. It is concluded that the performance of the annular flume is good enough to conduct erosion tests and the experimental method and results are valid.

미세-점착성 퇴적물의 침식률 산정을 목적으로 국내 최초로 환형수조가 제작되었으며, 수조의 성능, 실험 방법 및 결과 등에 대한 타당성 검증을 목적으로 고령토를 이용한 침식실험이 수행되었다. 각기 다른 밀도를 갖는 균일저면 조건하에서 총 4회의 실험이 수행되었으며, 이 결과로부터 점착성 퇴적물의 침식한계 전단응력과 침식률 계수가 산정되었다. 기존의 타 연구결과와의 비교$\cdot$검토를 통하여, 본 연구에서 특수 제작된 환형수조는 성능상에 문제가 없음이 간접적으로 확인되었으며, 균일저면의 제작과정을 포함하는 침식실험 방법 및 실험 결과의 타당성이 입증되었다.

Keywords

References

  1. 김재중 (1989), 점성토의 침식 및 퇴적에 관한 실험적 연구. 박사학위논문, 서울대학교
  2. 김차겸, 이종섭 (1992). 미세퇴적물의 부상특성에 관한 연구. 대한토목학회논문집, 12(3), 221-229
  3. 이정렬, 이동영, 황인태 (2000). A prediction of cohesive sediment transport in Young-Kwang area. 한국수자원학회 학술발표회 논문집, 905-910
  4. 이재연 (2001). 새만금 해역 갯벌 퇴적물의 침강 특성에 관한 연구. 석사학위 논문, 전북대학교
  5. 황규남, 소상돈(2002). 환형수조를 이용한 미세-점착성 퇴적물의 침식특성 조사. 한국수자원학회 학술발표회논문집, 1075-1080
  6. Ariathurai, R and Arulanandan, K. (1978). Erosion rates of cohesive soils. J. Hyd. Div., ASCE. 104, HY2, 279-283
  7. Ariathurai, R and Krone, R.B. (1976). Finite element model for cohesive sediment transport. J. Hyd. Div. ASCE, 102, HY, 323-338
  8. Cervantes, E.E. (1987). A laboratory study of fine sediment resuspension by Waves. MS Thesis, Univ. of Florida, Gainesville, FL
  9. Christensen, R.W. and Das, B.M. (1973). Hydraulic erosion of remolded cohesive soils. Special Report 135, Highway Research Board, Washington D.C., 8-19
  10. Dyer, K.R. (1986). Coastal and estuarine sediment dynamics. A Wiley-Interscience Publication, Chapter 8
  11. Dyer, K.R (1995). Geomorphology and sedimentology of estuaries. Development in Sedimentology 53 edited by G.M.E. Perillo., Publisher; Elsevier Science., Chapter 14
  12. Hwang, K.-N. and Mehta, A.J. (1989). Fine-sediment erodibility in Lake Okeechobee. Florida, UFL/COEL-89/019, Coastal and Oceanographic Engineering Dept., UF, Gainesville, Florida
  13. Krishnappan, B.G. (1993). Rotating circular flume, J. Hyd. Engineering, ASCE, 119(6),758-767 https://doi.org/10.1061/(ASCE)0733-9429(1993)119:6(758)
  14. Maa, J.P.Y. (1989). The bed shear stress of an annular sea-bed flume. Proc. Water Quality Management. Hamburg, Germany. 271-276
  15. Maa, J.P.Y. (1993). VIMS Sea Carousel: its hydrodynamic characteristics. In: Nearshore and Estuarine Cohesive Sediment Transport, A.J. Mehta (ed.), American Geophysical Union, Washington, 265-280
  16. Maa, J.P.Y., Lee, C.-H. and Chen, F.J. (1995). Bed shear stress measurement for vims Sea Carousel. Mar. Geol., 129, 129-136 https://doi.org/10.1016/0025-3227(95)00102-6
  17. Mehta, A.J., Partheniades, E., Dixit, J.G and McAnally, WH. (1982). Properties of deposited kaolinite in a long flume. Proc. of Hydraulics Div. Conference on Applying Research to Hydraulic Practice, ASCE, Jackson, Mississippi
  18. Owen, M.W (1970). A detailed study of the settling velocities of an estuary mud. Hydraulics Research Station. Wallingford, England, Report No. INT 78, September
  19. Parchure, T.M. and Mehta, A.J. (1985). Erosion of soft cohesive sediment deposits, J. Hyd. Engineering, ASCE, 111(10), 1308-1326 https://doi.org/10.1061/(ASCE)0733-9429(1985)111:10(1308)
  20. Thorn, M.F.C. and Parsons, J.G. (1980). Erosion of cohesive sediments in estuaries: an engineering guide. Proc. 3rd Int. Symp. Dredging Technology, England, 349-358
  21. Villaret, C. and Paulic, M. (1986). Experiments on the erosion of deposited and placed cohesive sediments in an annular flume and a rocking flume. Report No. UFLiCOEL-86/007, Coastal and Oceanographic Engineering Department, Univ. of Florida, Gainesville, FL