Laboratory and numerical studies of wave damping by emergent and near-emergent wetland vegetation |
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Authors: | Lauren N Augustin Jennifer L Irish Patrick Lynett |
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Institution: | 1. HDR Shiner Moseley, 555 N. Carancahua, Suite 1650, Corpus Christi, TX 78478 USA;2. Coastal and Ocean Engineering Division, Zachry Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136 USA |
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Abstract: | Wetlands protect mainland areas from erosion and damage by damping waves. Yet, this critical role of wetland is not fully understood at present, and a means for reliably determining wave damping by vegetation in engineering practice is not yet available. Laboratory experiments were conducted to measure wave attenuation resulting from synthetic emergent and nearly emergent wetland vegetation under a range of wave conditions and plant stem densities. The laboratory data were analyzed using linear wave theory to quantify bulk drag coefficients and with a nonlinear Boussinesq model to determine numerical friction factors to better represent wetland vegetation in engineering analysis. |
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Keywords: | Wave attenuation Vegetation damping Bottom friction Wetlands |
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