Research on deformation of submarine slope in Zhoushan Islands by in-situ observation

Liang, Tianyang; Xue, Liang; Hou, Yankai; Zhang, Hong; Shan, Hongxian

doi:10.1051/e3sconf/202126103015

Cited by 1 publication

(1 citation statement)

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“…Based on the self-developed in situ observation system, this study carried out in situ observation for 75 days on the typically inclined seabed slope in the southwest of Zhujiajian Island, Zhoushan, and obtained the observation data of lateral deformation and deformation direction of sliding surface (Xue et al, 2020;Liang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

In situ observation of wave-induced deformation of submarine landslides in tidal channel areas

Xue

Liu

et al. 2023

Front. Earth Sci.

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Landslides often occur in land slopes, estuaries, fjords, and intertidal zones in the marine environment, while landslides in tidal channels have not been systematically reported. The Zhoushan sea area is dotted with islands and crisscross tidal channels, which is a typical tidal channel development area. The data from the coastal zone and island survey, offshore engineering site selection, and environmental survey show that landslides are very common in tidal channel areas. The detailed study of this kind of landslide will enrich the research theory of submarine landslide and have important guiding significance for marine planning, development and site selection, and construction of coastal engineering in coastal areas. First, the submarine landslide in southwest of Zhujiajian Island in Zhoushan is investigated in this study. It is found that the sliding zone is parallel to the island coastline, with a length of about 250 m and an extension of 2 km, and the buried depth of the sliding surface is generally 8–10 m; then, through the self-developed seabed deformation observation system, combined with the hydrodynamic observation system, the landslide was observed in situ for 75 days. The observation results showed that the landslide slides at a constant speed along the sliding surface under the action of weight; the slides accelerate under the action of waves, and multiple sliding surfaces are generated in the landslide body at the same time. Finally, the genetic mechanism of submarine landslides in tidal channel areas is put forward.

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Section: Introductionmentioning

confidence: 99%