Studies on long-term geological safety strategy in the new Three Gorges Reservoir area
Yin Yueping
Abstract：In November 2020,the water storage level of the Three Gorges Dam was transitioned from 175 meter in experimental period to a normal operation level.Due to the population increase of over 10 million people in the Three Gorges Reservoir area,coupled with the annual cargo volume of the Yangtze River reaching 200 million tons,how to ensure long-term geological safety of townships and waterways in the reservoir area has become a top priority for disaster prevention and mitigation.Based on features of evolution of geological hazards in the Three Gorges Reservoir area during impoundment and operation periods,introductions are made on the monitoring and early warning system for geological hazards and problems with rock mass degradation and landslide surge risk caused by water level cycling and subsidence.Measures for long-term geological safety are proposed,such as using real-time monitoring for accurate early warning of landslides,high slopes,and bank slope degradation zones in urban areas around the reservoir area by application of information technology,paying more attention to the risks of landslides and collapses caused by deterioration zone of bank slope and accelerate comprehensive management of zoning and staging;strengthening remediation of unqualified geological structures and potential landslide disasters in the new areas expanded from the cities in the reservoir area,defining redlines for geological hazards;highlighting geological hazard risk management and geological safety diagnosis in resettlement townships;building up geological disaster prevention and emergency response capabilities;focusing on scientific and technological research on geological hazards since the impoundment of the reservoir,so as to work out forward-looking and targeted technologies and measures for comprehensive prevention and reduction of disasters during the follow-up work of the Three Gorges Project.
Keywords：new Three Gorges Reservoir areageological safetygeological hazardsrock mass degradationmonitoring and early warning
Publication Date：2024-11-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 26-35 )