GPS滑坡位移监测精度影响因素简析

Analysis on Affecting Factors of the Precision during GPS Landslide Deformation Monitoring

GPS位移监测技术已被广泛用于滑坡地质灾害监测预警工作中。三峡库区典型滑坡以GPS监测数据、野外踏勘和深部位移等资料为基础,对GPS监测影响进行研究,结果表明:监测点尤其是基准点被遮挡,采集到的数据存在严重误差,对滑坡变形分析影响巨大。

GPS deformation monitoring technology has been widely applied to landslide monitoring and early warning.After the monitoring system was established,the precision would be seriously affected when the monitoring stations are covered by trees or buildings over time.Take typical landslides in Three Gorges Area as an example,the factors affecting the precision during GPS landslide monitoring is analyzed based on monitoring data of GPS,field reconnaissance and deep displacement data.The result shows that when the monitoring stations,especially for the datum stations,are covered,the data gathered will be unreliable,which will serious affect the data processing and analysis on the deformation trend of the landslide.In order to ensure the normal operation of the monitoring system on the whole,the problems identified must be solved timely.