An Experimental Simulation of Global Navigation Satellite System in landslide monitoring and displacement analysis in Brienz/Brienzauls – Switzerland504
Jean A. Doumit – Rene Schnider
العدد الثالث – نيسان أبريل 2020
Pages 82-91
Abstract
The Global Navigation Satellite System (GNSS) monitoring of landslides is often needed for natural hazard study, analysis, or even as precaution alert. A local permanent GNSS network is installed to receive (x, y, and z) positions to estimate and monitor landslides concerning reference stations.
In this paper for local monitoring, coordinates accuracy and reliability of Happy Survey company monitoring system receivers are experimentally investigated in the area of Brienz/Brienzauls. Three monitoring stations were placed. With a minimum baseline (1.7 km long) between the geodetic reference receiver, the three monitoring GNSS stations continuously register positioning data for 11 months: data were processed by hourly sessions and the results provide comparisons between readings and the calculation of the mean absolute differences and the standard deviation of differences of horizontal and vertical landslides at all stations.
The standard deviation ellipses of all coordinates readings were calculated in a GIS environment to understand the degree and directions of the displacements.
The results of the correlation analysis prove the similarity between monitoring stations, Standard Deviation Ellipses SDE analyzed landslides movement and direction at each monitoring station, and this experiment shows that in Brienz/Brienzauls the landslide degree recorded by GNSS coordinates differences is independent of the slope degree of the study area.
Keywords: GNSS receivers; Happy Monitoring System; landslides and Standard Deviation Ellipses (SDE).
