Author Archives: t_zieher

The map below shows the location and length of observation period (until 2015) of 79 rain gauges operated by the Hydrographic Service throughout the state of Vorarlberg (ZAMG gauges not included). The size of the dark blue colored circles indicates … Continue reading →

The animation below shows the spatio-temporal progression of a landslide-triggering rainfall event from 08:00 a.m. on May 31st to 08:00 a.m. on June 2nd, 2013 for the territory of Vorarlberg, Austria. In the Laternser valley (catchment border in red) where … Continue reading →

With the help of the GRASS GIS module r.geomorphon a map of principal landform units was calculated for the state territory of Austria. This highly automated classification approach will be applied for the study areas as well in order to … Continue reading →

Landslides leave distinct signs (“geometric signature”, Pike 1988) in our landscape. However, on intensively cultivated agricultural areas these signs disappear rather quickly. The pictures below taken in South Tyrol near Kaltern this year show a repaired shallow landslide scar. Next … Continue reading →

With the help of a geomorphological map of a part of the Laternser valley (courtesy of A.C. Seijmonsbergen, University of Amsterdam) a geotechnical map of homogenous soil units will be created. All laboratory tests, field mappings and geophysical measurements as … Continue reading →

From September 20 to 26 dynamic penetration tests using a lightweight dynamic cone penetrometer (DCP) were conducted throughout the Laternser valley. Combined with geophysics an area-wide soil depth model will be derived. I personally want to stress out the extraordinary … Continue reading →

From July 22 to 25 sprinkling experiments were conducted in Laterns, Vorarlberg to reproduce and understand infiltration processes during prolonged and intense rainfall. Here you can see a time-lapse of the set-up in the field. Special thanks go to the … Continue reading →

The landslide inventory compiled by Brabb et al. (1999) prepared for Google Earth (TM) allows for exploring the location of landslides (especially debris flows) in the US. The inventory data including 6297 landslide locations throughout the US is available at … Continue reading →

The animation below shows changes in pore-pressure evolution and the respective factor of safety at a depth of 2 m resulting from the variation of hydraulic diffusivity. This “scenario” for a representative soil column during the rainfall event back in … Continue reading →

Don’t regard the ski tracks in the lower right part of the picture…