Tracking of Slow Moving Landslide by Photogrammetric Data - Case Study

Abstract

Aerial photography is a very powerful tool for monitoring of slow moving landslides over periods lasting for decades. They offer a synoptic view of landslide morphology and activity changing at different time intervals.This case study focused on Umka landslide. The availability of multi-year aerial photo and orthophotos coverage helped to assess morphological changes, which occurred in the last forty years. The morphological changes have been revealed from aerial images from 1970–2007 period and orthophotos that were taken in 2001, 2005 and 2010. Comparing archived results with field investigations we found that the south-western part of landslide is most active part, with surface moving greater than 20 m. In this paper we presented an example where aerial photographs and digital photogrammetric techniques were used for tracking and modelling the slow moving landslide displacement of Umka landslide (Belgrade, Serbia).