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Roughness Coefficients Evaluation of the Korean Riparian Vegetation

국내 수변 식생의 조도계수 평가

  • 이동섭 (한국건설기술연구원 하천해안연구실) ;
  • 이두한 (한국건설기술연구원 하천해안연구실) ;
  • 김명환 (한국건설기술연구원 하천해안연구실)
  • Received : 2011.03.30
  • Accepted : 2012.08.29
  • Published : 2012.11.15

Abstract

The main objective of this study is evaluating experimentally roughness coefficients of the Korean riparian vegetations based on the n-VR analysis to suggest the practical guideline for Manning's roughness coefficients for the channel design. Hydraulic experiments were conducted for Phragmites japonica Steud., Miscanthus sacchariflorus (Maxim.) Benth., and Phragmites communis Trin. under both submerged and un-submerged conditions, and the n-VR relationships are developed for each grass. Three vegetations tested in this study can be considered as same group showing similar roughness characteristics, though these grasses are strongly affected by vegetation stiffness. Vegetation roughness are also affected by the growth state of plants according to experimental results of Phragmites communis Trin.

본 연구의 목적은 국내 대표 수변 식생에 대한 조도 실험을 수행하여 n-VR 방법에 기초하여 각 식생에 대한 조도계수 산정식을 개발하고, 이를 하천설계시 조도계수 선정을 위한 가이드라인으로 활용하는 것이다. 실험 대상으로는 달뿌리풀, 물억새, 갈대를 선정하여 완전침수조건과 부분침수조건을 구현하여 실험을 수행하였으며, 실험결과 분석을 통해서 각 식생에 대한 n-VR 관계를 제시하였다. 달뿌리풀, 물억새 및 갈대 등은 유사한 조도계수를 가지는 식생군으로 묶어서 분류하는 것은 가능하나 식생 강성의 영향을 크게 받는 것으로 나타났다. 또한 갈대의 실험 결과 비교를 통해서 식생의 성장 시기에 따라 조도계수의 특성이 변화하는 것으로 나타났다.

Keywords

References

  1. 김주영, 이정규, 안종서(2010) 실측 자료를 이용한 국내하천의 조도계수 산정 -적용성 및 한강의 계획홍수위 검토-. 대한토목학회논문집, 대한토목학회, 제30권 제6B호, pp. 571-578.
  2. 김지성, 이찬주, 김원(2007) 실측 수위에 의한 자갈하천의 조도계수 산정. 한국수자원학회논문집, 한국수자원학회, 제40권 제10호, pp. 755-768. https://doi.org/10.3741/JKWRA.2007.40.10.755
  3. 김지성, 김용전, 이찬주, 김원(2009) 등가조고를 이용한 자갈하천의 하상저항 산정. 한국수자원학회논문집, 한국수자원학회, 제42권 제8호, pp. 619-629. https://doi.org/10.3741/JKWRA.2009.42.8.619
  4. 송재우, 박성식(2004) 식생수로와 비식생수로에서의 조도특성 및 유속분포. 대한토목학회논문집, 대한토목학회, 제24권 제6B호, pp. 545-552.
  5. 이정규, 이창현(2004) 수리학적 홍수추적 모형을 이용한 한강하류부의 조도계수 산정. 대한토목학회논문집, 대한토목학회, 제24권 제1B호, pp. 25-32.
  6. 이종석, Julien, P.Y., 김재훈, 이태우(2012) 식생하천의 현장자료를 이용한 조도계수 관계식 유도. 한국수자원학회논문집, 한국수자원학회, 제45권 제2호, pp. 137-149. https://doi.org/10.3741/JKWRA.2012.45.2.137
  7. 이준호, 윤세의(2007) 개수로에서 식생에 의한 수리특성 변화에 관한 실험적 연구, 한국수자원학회논문집, 한국수자원학회, 제40권 제3호, pp. 265-276. https://doi.org/10.3741/JKWRA.2007.40.3.265
  8. 이찬주, 김용전, 김지성, 김원(2010) 자갈하천의 조도계수 특성 분석. 대한토목학회논문집, 대한토목학회, 제30권 제2B호, pp. 149-157.
  9. 황의준, 전경수(1997) 한강 본류에 대한 부정류 계산모형: 모형의 보정. 한국수자원학회논문집, 한국수자원학회, 제30권 제5호, pp. 549-559.
  10. Arcement, G.J. and Schneider, V.R. (1984) Guide for Selecting Manning's Roughness coefficients for Natural Channels and Flood Plains. United States Geological Survey Water-supply Paper 2339, USGS.
  11. Barnes, H.H. (1967) Roughness characteristics of natural channels. US Geological Survey, Water-Supply Paper 1849, Washington, D.C.
  12. Chow, V.T. (1959) Open-channel hydraulics. McGraw Hill, New York.
  13. Cowan, W.L. (1956) Estimating hydraulic roughness coefficients. Agricultural Engineering, Vol. 37, No. 7, pp. 473-475.
  14. Darby, S.E. (1999) Effect of riparian vegetation on flow resistance and flood potential. Journal of Hydraulic Engineering, ASCE, Vol. 125, No. 5, pp. 443-454. https://doi.org/10.1061/(ASCE)0733-9429(1999)125:5(443)
  15. Fathi-Maghadam, M. and Kouwen, N. (1997) Nonrigid, nonsubmerged, vegetative roughness on floodplains. Journal of Hydraulic Engineering, ASCE, Vol. 123, No. 1, pp 51-57. https://doi.org/10.1061/(ASCE)0733-9429(1997)123:1(51)
  16. Henderson, F.M. (1966) Open-channel Flows. Macmillan, New York.
  17. Hicks, D.M. and Mason, P.M. (1991) Roughness characteristics of New Zealand rivers, Water Resources Survey, DSIR. Marine and Freshwater, New Zealand.
  18. Hydraulics Research (1985) The hydraulic roughness of vegetation in open channels, Report IT 281 (SR36), Hydraulics Research, Wallingford, UK.
  19. Jarvela, J. (2002) Flow resistance of flexible and stiff vegetation: a flume study with natural plants. Journal of Hydrology, Vol. 269, pp. 44-54. https://doi.org/10.1016/S0022-1694(02)00193-2
  20. Kao, D.R. Barfield, B.J., and Lyons, A.E. (1977) Hydraulic resistance of grass media on shallow overland flow, Kentucky Water Resources Research Institute Lexington, Research Report RR-107.
  21. Kirby, J.T., Durrans, S.R., Pitt, R., and Johnson, D. (2005) Hydraulic resistance in grass swales designed for small flow conveyance. Journal of Hydraulic Engineering, ASCE, Vol. 131, No. 1, pp. 65-68. https://doi.org/10.1061/(ASCE)0733-9429(2005)131:1(65)
  22. Kouwen, N. (1992) Modern approach to design of grassed channels. Journal of Irrigation and Drainage, ASCE, Vol. 118, No. 5, pp. 733-743. https://doi.org/10.1061/(ASCE)0733-9437(1992)118:5(733)
  23. Kouwen, N. and Li, R.M. (1980) Biomechanics of vegetative channel linings. Journal of hydraulics division, ASCE, Vol. 106, No. 6, pp. 1085-1103.
  24. Musleh, F.A. and Cruise, J.F. (2006) Functional relationships of resistance in wide flood plains with rigid unsubmerged vegetation. Journal of Hydraulic Engineering, ASCE, Vol. 132, No. 2, pp. 163-171. https://doi.org/10.1061/(ASCE)0733-9429(2006)132:2(163)
  25. Nikora, V. (2010) Hydrodynamics of aquatic ecosystems: An interface between ecology, biomechanics and environmental fluid mechanics. River Research and Applications, Vol. 26, pp. 367-384. https://doi.org/10.1002/rra.1291
  26. Palmer, V.S. (1945) A method for designing vegetated waterways. Agricultural Engineering, 26, pp. 516-520.
  27. Pitlo, R.H. (1982) Flow resistance of aquatic vegetation. Proceedings 6th Symposium on Aquatic Weeds, European Weed Research Society, Novi Sad, 1982, pp. 255-234.
  28. Shih, S.F. and Rahi, G.S. (1982) Seasonal variations of Manning's roughness coefficient in a subtropical marsh. American Society of Agricultural Engineers, Vol. 25, No. 1, pp. 116-119. https://doi.org/10.13031/2013.33488
  29. Ramser, C.E. (1929) Flow of water in drainage channels, Technical Bulletin No. 129, U.S. Department of Agriculture.
  30. Ree, W.O. (1949) Hydraulic characteristics of vegetation for vegetated waterways. Agricultural Engineering, 30, pp. 184-189.
  31. Ree, W.O. (1958) Retardation coefficients for row crops in diversion terraces. Transactions of the American Society of Agricultural Engineers, 1, pp. 78-80. https://doi.org/10.13031/2013.41221
  32. Rhee, D.S., Woo, H., Kwon, A.E., and Ahn, H.K. (2008) Hydraulic resistance of some selected vegetation in open channel flows. River Research and Applications, Vol. 24, pp. 673-687. https://doi.org/10.1002/rra.1143
  33. Shucksmith, J.D., Boxall, J.B., and Guymer, I. (2011) Bulk flow resistance in vegetated channels: Analysis of momentum balance approaches based on data obtained in aging live vegetation. Journal of Hydraulic Engineering, ASCE, Vol. 137, No. 12, pp. 1624-1635. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000457
  34. Smith, R.J., Hancock, N.H., and Ruffini, J.L. (1990) Flood flow through tall vegetation. Agricultural Water Management, Vol. 18, pp. 317-332. https://doi.org/10.1016/0378-3774(90)90014-P
  35. Stephens, J.C., Blackburn, R.D., Seaman, D.E., and Weldon, L.W. (1963) Flow retardance by channel weeds and their control. Journal of the Irrigation and Drainage Division, ASCE, Vol. 89, pp. 31-53.
  36. Stone, B.M. and Shen, H.T. (2002) Hydraulic resistance of flow in channels with cylindrical roughness. Journal of Hydraulic Engineering, ASCE, Vol. 128, No. 5, pp. 500-506. https://doi.org/10.1061/(ASCE)0733-9429(2002)128:5(500)
  37. Temple, D.M. (1982) Flow retardance of submerged grass channel linings. Transactions of the American Society of Agricultural Engineers, Vol. 25, No. 5, pp. 1300-1303. https://doi.org/10.13031/2013.33717
  38. Temple, D.M. (1986) Velocity distribution coefficients for grasslined channels. Journal of Hydraulic Engineering, ASCE, Vol. 112, No. 3, pp. 193-205. https://doi.org/10.1061/(ASCE)0733-9429(1986)112:3(193)
  39. Temple, D.M. (1999) Flow resistance of grass-lined channel banks. Applied Engineering in Agriculture, Vol. 15, No. 2, pp. 129-133. https://doi.org/10.13031/2013.5756
  40. Temple, D.M., Robinson, K.M., Ahring, R.M., and Davis, A.G. (1987) Stability design of grass-lined open channels, Agricultural handbook 667, USDA, Washington, D.C.
  41. USSCS(US Soil Conservation Service) (1954) Handbook of channel design for soil and water conservation. Publication SCS-TP61.
  42. Wu, F-C., Shen, H.W., and Chou, Y-J. (1999) Variation of roughness coefficients for unsubmerged and submerged vegetation. Journal of Hydraulic Engineering, ASCE, Vol. 125, No. 9, pp. 934-942. https://doi.org/10.1061/(ASCE)0733-9429(1999)125:9(934)