Drag force due to vegetation in mangrove swamps

  title={Drag force due to vegetation in mangrove swamps},
  author={Yoshihiro Mazda and E. Wolanski and B. King and A. Sase and Daisuke Ohtsuka and M. Magi},
  journal={Mangroves and Salt Marshes},
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… Expand
Tidal-Scale Hydrodynamics within Mangrove Swamps
Both the drag force and the horizontal eddy viscosity play a dominant role in the tidal-scale hydrodynamics in mangrove wetlands. Using field observations and basic fluid mechanics laws, the dragExpand
Tidal Flow in Mangrove Forests and the Eddy Viscosity
The hydraulic resistance characteristics in tidal scale in mangrove forests on which soil-accumulation processes dependwere studied in the Aira-Gawa mangrove areaIriomote IslandJapanwhich is aExpand
Tidal Flow in Riverine-Type Mangroves
The behavior of tidal flow in the riverine-forest type is investigated in the Aira-River mangrove area in Iriomote Island, Japan. In the mangrove swamp near the bank of the creek, a velocityExpand
Dependence of dispersion on vegetation density in a tidal creek‐mangrove swamp system
The dependence of dispersion in a tidal creek on the vegetation density in a fringing mangrove swamp is discussed through a numerical model. A secondary circulation prevails everywhere in the tidalExpand
Spatially varying drag within a wave-exposed mangrove forest and on the adjacent tidal flat
Abstract Mangroves have been shown to protect shorelines against damage from the combined hydrodynamic forces of waves and tides, owing to the presence of roots (pneumatophores) and tree trunks thatExpand
Tsunami inundation damping performance of mangrove based on two-dimensional numerical simulation
The mangrove parameters such as tree density and biomass of the mangroves were estimated based on the imagery analysis, and the form drags of the stilt root coefficient in inundation flow was calculated by aStilt root morphology model. Expand
Currents and Sediment Transport in Mangrove Forests
Abstract A field study of the tidal currents, cohesive sediment dynamics and transport of organic carbon in a highly vegetated mangrove swamp was carried out at Middle Creek, Cairns, Australia. TheExpand
A new model for predicting the drag exerted by vegetation canopies
The influence of vegetation canopies on the flow structure in streams, rivers, and floodplains is heavily dependent on the cumulative drag forces exerted by the vegetation. The drag coefficients ofExpand
Numerical simulation of turbulent exchange flow in aquatic canopies
ABSTRACT In the present study, lock-exchange flows through rigid emergent vegetation are investigated numerically. The volume-averaged Reynolds-averaged Navier–Stokes equations and the transportExpand
A comparison of biohydrodynamic interaction within mangrove and saltmarsh boundaries
Mangrove forests and saltmarshes are recognized for their roles in wave and current attenuation, although a comparison of in situ observations between woody and herbaceous plants is needed in orderExpand


Analysis of Flow through Vegetation
The Manning n value is quantitatively evaluated for flow in heavily vegetated channels. Momentum analysis shows that the composite n value as a function of flow depth is dependent on the bottomExpand
Tidal asymmetry in mangrove creeks
We model the dynamics of a tidal creek — mangrove swamp system. In the creek, a tidal asymmetry prevails. The ebb flow dominance at spring tides helps flush out the coarse sediment from the creek.Expand
Overland flow in wetlands: vegetation resistance.
Emergent wetland vegetation frequently provides most of the resistance to flow of surface water. Stems are typically spaced many diameters apart. Therefore, fluid friction should be computed fromExpand
Hydrodynamics of a tidal creek-mangrove swamp system.
It is shown that a net down-stream longitudinal current through mangrove swamps exists and is responsible for rapidly carrying away organic detritus to the ocean, thereby enhancing the export of nutrients from mangroves swamps. Expand
Flume observations on flow dynamics in Zostera marina (eelgrass) beds
Flow dynamics in Zostera marina L. (eelgrass) were studied in a large seawater flume. Velocity and turbulence intensity profiles were measured at 3 free-stream flow velocities (5. 10 and 20 cm S-'),Expand
Tidal export of particulate organic matter from a Northern Australian mangrove system
Particulate carbon and nitrogen exports from a north Queensland mangrove system are estimated. Mangrove litter, flushed by tidal action at a rate of 10 kg C ha −1 day −1 , represents the majorExpand
A preliminary evaluation of wave attenuation by four species of seagrass
Seagrasses are approximately equal to saltmarshes in reducing wave energy on a unit distance basis, but only when water depth is scaled to plant size. Expand
Arrangement of Swamp Forests and Landforms of the Alluvial Plain in the Lower Nakama River, Iriomote Island, Ryukyu Archipelago, Japan
The alluvial plain along the lower Nakama River on Iriomote Island can be divided from the shore landward into the following four sections: 1) a section consisting of the estuary, the coast of whichExpand
Introduction of fluid mechanics
A fluid is a substance in which the constituent molecules are free to move relative to each other. Conversely, in a solid, the relative positions of molecules remain essentially fixed underExpand
The Ecology of Mangroves