Landslide Disaster Mitigation in Three Gorges Reservoir, China

The purpose of the Three Gorges project is to construct a large dam, forming a large-scale water reservoir in the valley. When the ?nal design reservoir water level is reached, the length of the reservoir will be longer than 660 km, which extends from the dam site at Sandouping town to Maoer-Xia Gorge in Chongqing City. The reservoir crosses the low-medium mountainous area consisting of the fold zone from Sinian system to Mesozoic Erathem, which is distributed in Hubei Province, HunanProvince,YunnanProvinceandChongqingCity,tothelowmountainousarea formed by the fold zone ranging from the Triassic to the Jurassic Periods, which is distributed in the eastern part of Chongqing City. Generally, the reservoir area can be divided into two parts. The eastern part is from Sandouping town to Baidicheng in Fengjie County, with a length of 160 km. In this part, three portions consisting of limestone formed the narrow Three Gorges. Between the Three Gorges are two portions consisting of clastic rocks forming wide valleys. At the dam site are the Pre-Sinian System crystal rocks. In the Three Gorges parts, thick bulk limestone anddolomitearemainlydistributed,sandwichingthinlayersof sandstoneandshale. The mountain height at the gorge areas is about 600-1,200 m, and the width at thoseareasis only200-300m. Thegeomorphologycharacterizedby high mountains and deep valleys formed the famous three gorges, namely, Qutang Gorge in the west, Wu Gorge in the middle, and Xiling Gorge in the east. The Xiling Gorge is divided into eastern part and western part.

Zusammenfassung

This heavily-illustrated book on research results on landslide disaster mitigation in Three Gorges Reservoir consists of three parts: Regional properties of landslides in this area; case studies for typical landslides; new methodologies applied in this area.

Inhalt

Regional Properties of Landslides.- Geo-hazard Initiation and Assessment in the Three Gorges Reservoir.- Bank Slope Stability Evaluation for the Purpose of Three Gorges Reservoir Dam Construction*.- Research on the Characteristics and Slope Deformation Regularity of the Badong Formation in the Three Gorges Reservoir Area.- Distribution of Dangerous Rockmasses on the High Steep Slopes in the Three Gorges Area.- An Evaluation Study of Bank Collapse Prediction in the Three Gorges Reservoir Area.- Distribution Features of Landslides in Three Gorges Area and the Contribution of Basic Factors.- Discussion on Land Use Based on Landslide Management in Three Gorges Reservoir Areas.- Case Studies for Typical Landslides.- Mechanism for the Rapid Motion of the Reactivated Qianjiangping Landslide in Three Gorges Dam Reservoir, China.- Evaluation of the Roles of Reservoir Impoundment and Rainfall for the Qianjiangping Landslide in Zigui County, Three Gorges Area.- Unsaturated Creep Test and Modeling of Soils from the Sliding Zone of the Qianjiangping Landslide in the Three Gorges Area, China.- Monitoring on Shuping Landslide in the Three Gorges Dam Reservoir, China.- The Anlesi Landslide in Wanzhou, China: Characteristics and Mechanism of a Gentle Dip Landslide.- Preliminary Study on Mud-Rock Flows Channel of the Bailuxi River, Wuxi County, China.- Stability Assessment and Stabilizing Approaches for the Majiagou Landslide, Undergoing the Effects of Water Level Fluctuation in the Three Gorges Reservoir Area.- Mass Rock Creep and Landsliding on the Huangtupo Slope in the Reservoir Area of the Three Gorges Project, Yangtze River, China.- Study on the Possible Failure Mode and Mechanism of the Xietan Landslide When Exposed to Water Level Fluctuation.- A Study of the 1985 Xintan Landslidein Xiling Gorge, Three Gorges Area, China.- Time Prediction of the Xintan Landslide in Xiling Gorge, the Yangtze River.- Back-Analysis of Water Waves Generated by the Xintan Landslide.- New Methodologies Applied in this Area.- Intelligent Optimization of Reinforcement Design Using Evolutionary Artificial Neural Network for the Muzishu Landslide Based on GIS.- The Application of Fractal Dimensions of Landslide Boundary Trace for Evaluation of Slope Instability.- Uncertainty Evaluation of the Stability of the Huanglashi Landslide in the Three Gorges of the Yangtze River.- Recognition of Lithology and Its Use in Identification of Landslide-Prone Areas Using Remote Sensing Data.- Construction and Application of a Real-Time Monitoring System for Landslides.- Entropy-Based Hazard Degree Assessment for Typical Landslides in the Three Gorges Area, China.- The Conceptual Model of Groundwater Systems in a Large-Scale Landslide - A Case Study of the Baota Landslide in the Impoundment Area of Three Gorges Project.- Bank Collapse Along the Three Gorges Reservoir and the Application of Time-Dependent Modeling.