三峡库区滑坡监测基准的稳定性分析及结果  

Stability Analysis and Results of the Landslide Monitoring Datum in the Three Gorges Reservoir Area

作　　者：黄声享[1] 罗力[1] 

机构地区：[1]武汉大学测绘学院,湖北武汉430079

出　　处：《武汉大学学报（信息科学版）》2014年第3期367-372,共6页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(41274020)~~

摘　　要：针对三峡库区近600km水系范围内的滑坡监测问题，利用2008～2011年多期GPS观测资料，对基准点进行稳定性分析。结果表明，三峡水库高水位蓄水的3a里，库区存在不稳定的基准点，其水平位移在4cm以上，最大点位变化达79．4cm。将不稳定基准点的位移方向与现场地理环境进行核查，具有一致性。Focusing on the limitations of conventional methods, a new method for testing the stability of landslide monitoring network for long and narrow areas was studied. The process was divided into three steps： Firstly, the relatively stability points were identified in the ITRF frame; Secondly, the reference points displacement was calculated in the local reference frame as defined by relatively stabile points; Thirdly, a displacement significance test was used to analyze the stability of these reference points. Using GPS observations （2008-2011） of a landslide monitoring network in the Three Gorges reservoir area, the stability of all reference points was tested： finding moved reference points during three years of high water impoundment, with a horizontal displacement of the moved reference points of more than 4 cm, with a maximum of 79.4 cm. The displacement direction of unstable reference points was physically inspected along with the geographical environment, revealing that they were consistent with the results obtained from the proposed testing method.

关 键 词：三峡库区 GPS 滑坡监测 基准稳定性 

分 类 号：P258[天文地球—测绘科学与技术]