Lacustrine sedimentary response to natural hazards

Lacustrine sediments store a wealth of information and are often used to indicate climate change. Natural disasters such as earthquake, flood, landslide or collapse usually form characteristic disturbances in lacustrine sediments, which can be analyzed and identified using lake geology methods. This paper reviews the research progress of lacustrine sediments, systematically summarizes the characteristics of typical natural disasters in lacustrine sediments, and focuses on the identification methods of natural disaster events in lacustrine sediments. Among them, the comprehensive analysis method integrates various analysis methods for sedimentary identification of lake events at the present stage. ① Identify the endogenous and exogenous origin based on the relationship between sedimentary facies and event-induced deposits(EID); ② Recognize the most likely trigger based on the elimination of impossible triggers; ③ Verify the correctness of the most likely trigger according to the existing identification criteria. This method integrates the advantages of typical mark analysis and exclusion method, and is the most effective analysis method at present. This paper also discusses the advantages, disadvantages and constraints of the study of lacustrine sediment disaster events. The continuity, sensitivity and high resolution of lacustrine sediments are conducive to the study of disaster events, but the establishment of sedimentary identification markers of typical natural disaster events in lakes is still the key to restricting the study of lake abnormal events in the future.