Comparative Analysis of the Erosion Mechanism of Different Profiles in the Arcuate Foreshore under Typhoon Action

Authors

  • Zishen Chen Xinhua College of Sun Yat-sen University, Guangzhou, 510520, China;School of Geography and Planning, Sun Yat-sen University, Guangzhou, 510275, China
  • Jitao Yu School of Surveying and Land Information Engineering, Henan Polytech University, Jiaozuo, 454000, China

DOI:

https://doi.org/10.30564/jms.v2i3.2425

Abstract

The comparison results of three beach profile data repeatedly measured before and after the typhoon in Shuidong Bay, west Guangdong province which show that there are significant differences in beach profile erosion and response process. And the changes of beach profile can be divided into: strong downward overall low shoreline regressive type and overall slight erosion shoreline regressive type. Application of the modified mildslope equation along three beach profile are simulated wave high reflection to the sea side, to the section vertical shore pressure gradient and including water roll force and radiation stress, the vertical shore forces one dimensional profile along the momentum conservation equation (radiation stress and water roll force) bottom friction and lateral mixing reaction between numerical solution, the momentum conservation equations of the wave increases the water flow velocity and section along the profile distribution of wave height and related forces. The analysis shows that the extent and difference of coastal erosion depend on the shoreline erosion mode stimulated by the maximum surge water of the coastal current and the maximum velocity of the coastal current and the dynamic state of the profile topography under the action of the profile location, morphology and incident wave elements.

Keywords:

Foreshore profile morphodynamics; Shore erosion mechanism; Wave setup; Longshore current; Longshore sediment transport rate

References

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Vol. 2 , Iss. 3 (October 2020)

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