Abstract
The study utilizes a coupled wave-surge-vegetation modeling system to quantify the effects of salt marsh vegetation on hurricane-generated waves. The wave model incorporates the energy dissipation model of Chen and Zhao (2012) for random waves over vegetation. The storm surge model incorporates the vegetal drag for both rigid and flexible types of vegetation. The surge and wave models with the vegetation effects are coupled, allowing the spatially and temporally varying vegetation heights, water levels and depth-averaged currents from the storm surge model to be fed into the wave model. Numerical experiments have revealed that vegetation can change the surge height and a storm surge can change the vegetation height. Both control the wave reduction rate in flooded wetlands. The impact of vegetation on hurricane-generated waves consists of indirect and direct effects. The former is caused by the changes in surge height due to vegetation. The latter comes from the direct interaction between vegetation and the oscillatory motion of surface waves. It has been found that flexible marsh vegetation deflects under the hydrodynamic force produced by a hurricane. The deflected height not only reduces the flow resistance in the surge model, but also decreases the energy dissipation caused by vegetation in the wave model. Consequently, neglecting plant flexibility may lead to overestimates of vegetation effects and exaggeration of wetland potential for flood risk reduction.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Simulations found vegetation changed surge height.
Not reportedComparatorDirection
Verbatim
e0“vegetation can change the surge height”
Claim · model-written summary
Simulations found storm surge changed vegetation height.
Not reportedComparatorDirection
Verbatim
e0“a storm surge can change the vegetation height”
Claim · model-written summary
Surge height and vegetation height controlled wave reduction rate in flooded wetlands.
Not reportedDirection
Verbatim
e0“Both control the wave reduction rate in flooded wetlands.”
t0“VEGETATION”
Claim · model-written summary
Flexible marsh vegetation deflected under hurricane hydrodynamic force.
Not reportedDirection
Verbatim
e0“flexible marsh vegetation deflects under the hydrodynamic force produced by a hurricane.”
Claim · model-written summary
Deflection reduced vegetation flow resistance in the surge model.
Verbatim
e0“The deflected height not only reduces the flow resistance in the surge model”
t0“VEGETATION”
Claim · model-written summary
Deflection decreased vegetation-caused energy dissipation in the wave model.
- Taxon
- vegetatione0
- Outcome
- energy dissipation caused by vegetatione0
- Direction
- decreasese0
- Qualifier
- wave modele0
Not reportedOrgan / stage
Verbatim
e0“but also decreases the energy dissipation caused by vegetation in the wave model.”