Analysis of bed level elevation during beach recovery after storm on Golden Beach, Hailing Island, Guangdong

LIU Run; LI Zhiqiang; ZHU Daoheng; HU Pengpeng; SUN Yan; ZENG Chunhua

doi:10.16028/j.1009-2722.2023.201

2024 Vol. 40, No. 8

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Article navigation > Marine Geology Frontiers > 2024 > 40(8): 22-31

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LIU Run, LI Zhiqiang, ZHU Daoheng, HU Pengpeng, SUN Yan, ZENG Chunhua. Analysis of bed level elevation during beach recovery after storm on Golden Beach, Hailing Island, Guangdong[J]. Marine Geology Frontiers, 2024, 40(8): 22-31. doi: 10.16028/j.1009-2722.2023.201

Citation:

LIU Run, LI Zhiqiang, ZHU Daoheng, HU Pengpeng, SUN Yan, ZENG Chunhua. Analysis of bed level elevation during beach recovery after storm on Golden Beach, Hailing Island, Guangdong[J]. Marine Geology Frontiers, 2024, 40(8): 22-31. doi: 10.16028/j.1009-2722.2023.201

Analysis of bed level elevation during beach recovery after storm on Golden Beach, Hailing Island, Guangdong

1.
College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China
2.
College of Electronic and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, China
3.
School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
4.
College of Ocean Engineering, Guangdong Ocean University, Zhanjiang 524088, China

More Information

Corresponding author: LI Zhiqiang, qiangzl1974@163.com

Received Date: 11 August 2023

Publish Date: 28 August 2024

Abstract

Abstract

The bed surface changes during the initial stage of beach recovery after a typhoon are an important research content for the mechanism of beach evolution. We analyzed the characteristics of the bed level elevation (BLE) change under various tidal cycles and wave conditions using the BLE and wave and tidal data of the surf zone of Golden Beach (Jinshatan, Hailing Island (Yangjiang, Guangdong, South China), which were obtained from field observation from August 17 to 22, 2021. We then used continuous wavelet transform to analyze the characteristics of the cycle change of the BLE. The findings are ① during the beach's storm-related recovery phase, the majority of the waves are breaking waves, and the beach recovers quickly at low tide when there are powerful waves, while the beach recovers to a limited extent at high tide coupled with weak waves. ② The BLE decreases during the "highest tide" and raises during the "sub-highest tide", and the periodic change of BLE during the "sub-highest tide" is more substantial. The beach recovers to a limited extent during high tide combined with weak waves. ③ Various hydrodynamic factors affect the change in BLE, and the different observation point have different responses to tidal level changes and wave forces. The BLE is more affected by deep-water wave height when observation site is beyond the surf zone, while the wave, the tidal level, and the type of broken waves inside the surf zone are main impact factors on the BLE.
- tropical storm /
- surf zones /
- bed level changes /
- wavelet analysis /
- beach restoration

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