Abstract
Monitoring and early warning of submarine landslides could provide instant predictions for landslides, which is to avoid the destructive damage of submarine facilities such as pipelines and optical cable, etc effectively. However, researches on submarine landslide focus on numerical simulation and laboratory test, lacking support of in-situ observation data. This paper established the submarine landslide monitoring and early warning system by combining real-time monitoring data with web network platform and database technique. Based on the computational analysis of key monitoring parameters in the process of seabed deformation and sliding, the system has realized the accurate prediction and early warning of submarine landslides. The system has been applied to the submarine landslide monitoring in Zhoushan sea area, Zhejiang province, China, which has ensured the safety of offshore platforms and submarine projects in this area. The establishment of this system provides a new idea and method for submarine landslide warning.
Highlights
Submarine landslide refers to the geological phenomenon that the slope located on the seafloor is destabilized and damaged by its internal dynamic factors such as seismic activity, volcanic activity, active fault, or by Marine dynamic factors such as storm surge and tidal change, and moves downhill along a certain slope due to the action of gravity [1,2,3]
Most of the research work on submarine landslides focuses on numerical simulation and laboratory tests, which are not highly related to in-site monitoring
The monitoring and early warning methods of land-based landslides are used for reference, and a monitoring and early warning system of submarine landslides is built by using the Web platform combined with database technology
Summary
Submarine landslide refers to the geological phenomenon that the slope located on the seafloor is destabilized and damaged by its internal dynamic factors such as seismic activity, volcanic activity, active fault, or by Marine dynamic factors such as storm surge and tidal change, and moves downhill along a certain slope due to the action of gravity [1,2,3]. It is impossible to carry out real-time early warning and prediction for submarine landslides. The monitoring parameters of submarine landslides in the above studies are relatively single and have not been combined with the landslide warning work. The monitoring and early warning methods of land-based landslides are used for reference, and a monitoring and early warning system of submarine landslides is built by using the Web platform combined with database technology. The system can monitor the parameters closely related to submarine landslides in real-time, and set parameter threshold and early warning formula for submarine landslides. Taking Zhujiajian Sea Area of Zhoushan City, Zhejiang province, China as an example, this study conducted in-site monitoring on the potential area of submarine landslide, and combined with in-situ monitoring data, carried out early warning on the occurrence of submarine landslide
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