黄河水下三角洲海洋地质灾害研究现状与展望OA

The Yellow River subaqueous delta is prone to various marine geological hazards and hosts numerous offshore engineering facilities.A systematic summary of the research on these geological hazards is essential for clarifying their occurrence mechanisms and identifying influencing factors,which can provide scientific guidance for disaster prevention and mitigation.This study introduces the commonly used research methods,including marine engineering geological investigations,in-situ monitoring,physical model tests and numerical simulation.Based on these methods,it summarizes and analyzes the current research status of geological hazards in the Yellow River subaqueous delta.Research findings indicate that the main geohazards in the delta are seabed liquefaction,submarine landslides,and seabed scouring.Previous studies have identified wave-induced pore pressure accumulation as the core driving mechanism of the hazards.A"disturbance-liquefaction-resuspension-redeposition"hazard-inducing model has been proposed.The coupled hazard-chain effect between liquefaction and scouring has been revealed.In addition,a morphological classification system and predominant distribution zones for submarine landslides have been established.Finally,the study analyzes the major constraints limiting current research progress and outlines future directions.Future research should focus on the development of long-term in-situ monitoring and coupled multiphysics numerical,so as to improve the capability of quantitative prediction and risk assessment of geological hazards.