Volume 42 Issue 7
Jul.  2023
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Article Contents
Yazhuang Zhao, Hongshuai Qi, Shaohua Zhao, Feng Cai, Jianhui Liu, Pu Xu, Zheyu Xiao, Yanyu He, Zhiyong Zhang. Nourishment and disaster mitigation efficiency of feeding sand on the dry section of a dissipative beach[J]. Acta Oceanologica Sinica, 2023, 42(7): 138-148. doi: 10.1007/s13131-023-2193-7
Citation: Yazhuang Zhao, Hongshuai Qi, Shaohua Zhao, Feng Cai, Jianhui Liu, Pu Xu, Zheyu Xiao, Yanyu He, Zhiyong Zhang. Nourishment and disaster mitigation efficiency of feeding sand on the dry section of a dissipative beach[J]. Acta Oceanologica Sinica, 2023, 42(7): 138-148. doi: 10.1007/s13131-023-2193-7

Nourishment and disaster mitigation efficiency of feeding sand on the dry section of a dissipative beach

doi: 10.1007/s13131-023-2193-7
Funds:  The National Natural Science Foundation of China under contract No. 41930538; the Scientific Research Foundation of the Third Institute of Oceanography, Ministry of Natural Resources under contract No. 2022017.
More Information
  • Corresponding author: E-mail: qihongshuai@tio.org.cn
  • Received Date: 2022-11-12
  • Accepted Date: 2023-03-10
  • Available Online: 2023-08-09
  • Publish Date: 2023-07-25
  • To explore the nourishment effect and disaster reduction efficiency of a fully dissipative dry beach under the impact of storms, this paper uses the measured topography and hydrodynamic data to establish a one-dimensional numerical model of the XBeach beach profile. By numerically modeling the change in the nourished profile for different dry beach widths under normal waves and storm conditions and the recovery process of the profile after the storm, the degree of response in dry beach nourishment for the fully dissipative beach is analyzed. The results show that under normal wave conditions, the response of the nourished dry beach is obvious. Sediment on the dry beach erodes heavily, and the shoreline moves landward over a long distance. With the increase in the width and size of the dry beach, the wave height at the bottom of the backshore profile decreases, the wave height attenuation rate increases continuously, and the wave elimination effect is remarkable. When the storm incident wave intensifies, the wave height attenuation rate of the nourished dry beach decreases, indicating that the smaller the storm intensity is, the more significant the wave reduction effect of the nourished dry beach is. At the same time, different profile arrangements of nourished dry beaches suffer from different degrees of erosion under storm conditions, with significant changes in profile morphology. With intensified storm action, the intensity of sediment erosion in the nourished dry beach increases, the nourishment is weakened, and the recovery effect of the profile after the storm is not obvious. The results of the numerical modeling highlight that the dry beach nourishment method can resist storms to a certain extent, but the overall effect is relatively limited.
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