engleski

Object Monitoring in Urban Landslide Areas Using Terrestrial Laser Scanning

Cresnjevec landslide is a reactivated landslide with an unknown precise location, time and cause of initial landslide movement. In the first documents concerning the slopes instability, construction works as well as vegetation removal, were determined to be the causes of landslide activity. Also, future landslide activity was predicted. Landslide remedial works encompassing regulation of the stream in the valley bottom, and construction of drainage wells in the valley, took place in 2004. Despite the remedial works, the landslide remains active and is threatening the houses which are still inhabited. A clear borderline of the landslide can be observed on a digital terrain model created from aerial laser scanning data. Still, due to accuracy limitations of aerial laser scanning, changes in topography cannot be detected to an adequate degree. Data obtained through terrestrial laser scanning (TLS) on the other hand, having millimeter accuracy, is capable of providing satisfactory insight into landslide activity. Thus, object monitoring in the zone of the landslide activity, as well as its vicinity, using TLS was chosen to obtain relevant data. Results of analysis conducted on the gathered data are shown in this paper. The results clearly show this methodologies application capabilities for urban areas facing similar problems.

reactivated landslide; slope instability; laser scanning; digital terrain model; urban areas

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