Geoelectrical Monitoring - landslide Ampflwang (Upper Austria)

The geoelectrical monitoring dataset was acquired on a landslide formed after a house construction within the area of an old deep-seated landslide near to the town of Ampflwang (Upper Austria). The deep-seated landslide developed mostly in quaternary slope/landslide deposits and anthropogenic deposits, situated above the underlying Neogene rocks, i.e.: fluvial gravels of Hausruck Formation at the top, limnic to fluvial coal-rich clay with brown coal beds of Ampflwang Formation in the middle, and marine silty-sandy marl to silty sand of Ottnang Formation at the base. The small part of the old deep-seated landslide reactivated in March 2010, was observed by topographic changes and inclinometric data. It is about 110 m long, 40 m wide, 4 m thick and represents a shallow rotational-translational landslide of an elliptic shape and quite smooth topography. The surrounding infrastructure (e.g. terrace, sewage pipes) of the newly constructed family house was partly damaged by the landslide. The main purpose of the collection of continuous geoelectrical data was to investigate the correlation between the temporal change of electrical resistivity and the acceleration of the landslide body, which was directly influenced by increased water saturation of the subsurface. Therefore, the recorded temporal changes of the electrical resistivity are mainly based on the changes of water saturation and soil temperature. The monitoring period lasts for almost one year (12/2010 to 09/2011) and a complete geoelectrical dataset was collected every four hours, consisting of 1765 data points. The data collection was achieved with the Geomon4D system, which was developed by the Department of Geophysics of the Geological Survey of Austria. The provided series of geoelectrical datasets represents raw data, where a very simple preliminary filtering is performed, to eliminate data points that are erroneous due to technical limitations of the monitoring system. This is applied to all data points exceeding the voltage range of -9.95 to +9.95 V or with injection current below 0.5 mA (forward or reverse). Therefore, a comprehensive data analysis, processing and inversion are possible with the published datasets.