TY - JOUR
T1 - Benefits of vegetation for mitigating wave impacts on vertical seawalls
AU - Rosenberger, Daniel
AU - Marsooli, Reza
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/4/15
Y1 - 2022/4/15
N2 - This study quantifies the benefits of vegetation for reducing wave loads on seawalls and the probability of failure due to sliding and overturning. A computational fluid dynamic model is used to quantify wave forces and moments on a laboratory-scale vertical seawall in the presence and absence of vegetation. The model is first calibrated using existing laboratory measurements and then implemented to simulate wave impacts under 200 various wave scenarios. The simulated forces are analyzed to calculate the sliding force and overturning moment and quantify the benefit of vegetation for reducing the seawall failure incidents and increasing the factor of safety. Under the laboratory-scale conditions considered in this study, vegetation causes a reduction of up to 89 percent in the wave force, leading to a substantial decrease in sliding and overturning failure scenarios and increase in the scenarios with acceptable factors of safety. It is found that a smaller seawall combined with vegetation results in an overturning and sliding performance, in terms of failure and factor of safety, similar to the performance of a larger seawall without vegetation. The results suggest that vegetation has a potential to protect coastal structures and allow engineers to design efficient hybrid nature-based and engineering defenses.
AB - This study quantifies the benefits of vegetation for reducing wave loads on seawalls and the probability of failure due to sliding and overturning. A computational fluid dynamic model is used to quantify wave forces and moments on a laboratory-scale vertical seawall in the presence and absence of vegetation. The model is first calibrated using existing laboratory measurements and then implemented to simulate wave impacts under 200 various wave scenarios. The simulated forces are analyzed to calculate the sliding force and overturning moment and quantify the benefit of vegetation for reducing the seawall failure incidents and increasing the factor of safety. Under the laboratory-scale conditions considered in this study, vegetation causes a reduction of up to 89 percent in the wave force, leading to a substantial decrease in sliding and overturning failure scenarios and increase in the scenarios with acceptable factors of safety. It is found that a smaller seawall combined with vegetation results in an overturning and sliding performance, in terms of failure and factor of safety, similar to the performance of a larger seawall without vegetation. The results suggest that vegetation has a potential to protect coastal structures and allow engineers to design efficient hybrid nature-based and engineering defenses.
KW - Hybrid flood mitigation
KW - REEF3D
KW - Reliability analysis
KW - Seawall
KW - Vegetation
KW - Wave load
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U2 - 10.1016/j.oceaneng.2022.110974
DO - 10.1016/j.oceaneng.2022.110974
M3 - Article
AN - SCOPUS:85126288116
SN - 0029-8018
VL - 250
JO - Ocean Engineering
JF - Ocean Engineering
M1 - 110974
ER -