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Mangroves and Salt Marshes

, Volume 1, Issue 3, pp 193–199 | Cite as

Drag force due to vegetation in mangrove swamps

  • Yoshihiro Mazda
  • Eric Wolanski
  • Brian King
  • Akira Sase
  • Daisuke Ohtsuka
  • Michimasa Magi
Article

Abstract

Field studies of tidal flows in largely pristine mangrove swamps suggestthat the momentum equation simplifies to a balance between the water surfaceslope and the drag force. The controlling parameter is the vegetation lengthscale LE, which is a function of the projected area ofmangrove vegetation and the volume of the vegetation. The value ofLE varies greatly with mangrove species and water depth. It isfound that the drag coefficient is related to the Reynolds number Re definedusing LE. The drag coefficient decreases with increasingvalues of Re from a maximum value of 10 at low value of Re (<104), and converges towards 0.4 for Re < 5 ×104.

mangrove swamp drag coefficient flow resistance tidal flow vegetation density Reynolds number 

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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Yoshihiro Mazda
    • 1
  • Eric Wolanski
    • 2
  • Brian King
    • 2
  • Akira Sase
    • 3
  • Daisuke Ohtsuka
    • 4
  • Michimasa Magi
    • 1
  1. 1.School of Marine Science and TechnologyTokai UniversityShimizu, ShizuokaJapan
  2. 2.Australian Institute of Marine ScienceTownsville M.C.Australia
  3. 3.Tohoku Afforestation & Environmental Protection Company, Ltd.Sendai, MiyagiJapan
  4. 4.Mikuniya CorporationTakatsu-ku, Kawasaki, KanagawaJapan

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