【摘要】 三峡水库建成蓄水后,大量的高边坡和库岸的稳定性将发生变化,针对库区地质灾害的特点,讨论了运用3S技术与地面监测网相结合监测滑坡和库岸变形的有关问题,介绍了在万州、巫山和奉节等地初步建立的“三峡库区库岸与滑坡变形监测及灾害预警系统”与获得的部分观测成果。这些成果已经在评估三峡库区滑坡和库岸稳定性方面发挥了积极的作用。更多还原

【Abstract】 A comprehensive investigation of the water-line instability problem of the Three Gorges Reservoir region is of important relevance to hazard migration in a populated region and will benefit greatly local government’s plan of rebuilding the Three Gorges Reservoir region and relocating the population. In this paper,it was pointed out that landslide monitoring system,as a foundation of the investigation,must be made in the first stage by developing and establishing a slope deformation monitoring system based on 3S techniques and ground observation networks. The multiple investigative approaches and monitoring networks , including global positioning system (GPS) geodetic networksl,ateral earth movement measuring boreholes,pore pressure observing networks and radio remote sensor networks,installed in Wanzhou District,Wushan and Fengjie counties of Chongqing City ever since 1999 were introduced. In allusion to characteristics of natural disasters within this region,various aspects of problems relevant to monitoring system of landslides deformation were discussed. Slopes will be classified firstly by risk index mainly according to geological evaluation and GPS survey results in an area and one can therefore find several critical regions to intensify observation by radio remote sensor networks. The data collected through the multiple investigative approaches are managed with especially designed geography information system (GIS) in which various databases are integrated such as geological prospect data,landslide physiognomy data and hydrological data. Based on this GIS system,observed data can be analyzed,displayed and output in graphics mode. A few representative observation results presented in the paper demonstrate that the proposed monitoring and warning system is an effective approach to investigate slope deformation and can be used to test models of the rock and soil slope mechanics directly through the well-constrained field examples from the Three Gorges Reservoir region.更多还原