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Volume 18 Issue 6
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Abstract
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GU Feng-feng, NI Han-gen, QI Ding-man. Transition of long-stalk vegetation resistance coefficient between unsubmerged condition and submerged condition[J]. Advances in Water Science, 2007, 18(6): 823-828.
Citation: GU Feng-feng, NI Han-gen, QI Ding-man. Transition of long-stalk vegetation resistance coefficient between unsubmerged condition and submerged condition[J]. Advances in Water Science, 2007, 18(6): 823-828.
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Transition of long-stalk vegetation resistance coefficient between unsubmerged condition and submerged condition

  • 1.

    Estuary and Coastal Scientific Research Institute of the Ministry of Communication, Shanghai 201201, China;

  • 2.

    School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China

Funds: The study is financially supported by the National Natural Science Foundation of China(No.50139020).
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  • Received Date: November 12, 2006
  • Revised Date: March 11, 2007
    Graphical Abstract
    • Abstract
  • The vertical velocity distributions in the vegetated channel and the relationship between resistance coefficient and flow depth were measured in laboratory experiments.Based on the assumption that the velocity in the region with vegetation keeps constant,the velocity distributions above the top of vegetation may be well predicted which closely fit the results of the experiment.And then the relationship between the resistane coefficient and flow depth for the vegetations under the unsubmerged and submerged conditions is deduced theoretically.Finally an example is given that the relationship between n and h for reeds is extended successfully from unsubmerged to submerged condition,and some experimental results approve such a conversion.
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    • References (20)
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