Université de Fribourg

Mapping slope movements in Alpine environments using TerraSAR-X interferometric methods

Barboux, Chloé ; Strozzi, Tazio ; Delaloye, Reynald ; Wegmüller, Urs ; Collet, Claude

In: ISPRS Journal of Photogrammetry and Remote Sensing, 2015, vol. 109, p. 178–192

Mapping slope movements in Alpine environments is an increasingly important task in the context of climate change and natural hazard management. We propose the detection, mapping and inventorying of slope movements using different interferometric methods based on TerraSAR-X satellite images. Differential SAR interferograms (DInSAR), Persistent Scatterer Interferometry (PSI), Short-Baseline...

Université de Fribourg

Hazard assessment of glacial lake outburst floods from Kyagar glacier, Karakoram mountains, China

Haemmig, Christoph ; Huss, Matthias ; Keusen, Hansrudolf ; Hess, Josef ; Wegmüller, Urs ; Ao, Zhigang ; Kulubayi, Wubuli

In: Annals of Glaciology, 2014, vol. 55, no. 66, p. 34–44

Kyagar glacier is located in the Chinese Karakoram mountains. The glacier tongue entirely blocks the riverbed in the upper Shaksgam valley and impounds a glacial lake, which was the source of several violent and disastrous glacial lake outburst floods (GLOFs). A GLOF early warning system was implemented between 2011 and 2013. We present an integrative analysis of the hazard potential of Kyagar...

Université de Fribourg

Combined observations of rock mass movements using satellite SAR interferometry, differential GPS, airborne digital photogrammetry, and airborne photography interpretation

Strozzi, Tazio ; Delaloye, Reynald ; Kääb, Andreas ; Ambrosi, Christian ; Perruchoud, Eric ; Wegmüller, Urs

In: Journal of Geophysical Research, 2010, p. F01014

Recent global warming, through the related retreat of mountain glaciers, causes a growing number of different slope instabilities requiring accurate and cost-effective monitoring. We investigate the potential of combined remote sensing observations from satellite and airborne microwave and optical sensors for an efficient survey of mountainous ground displacements. The evolution of a paraglacial...