Terrestrial Scanning / Topography & Monitoring

Landslide Monitoring - Visualization and Quantification of Material Movement 25.09.2008

The Miozza basin, located in Carnia, a tectonically active alpine region of north-eastern Italy covers an area of 10.7 km². Elevation ranges from 471 to 2075 m a.s.l.. The slope angle has an average value of 33° with a maximum value of 77°. The area has a typical North Eastern Alpine climate with short dry periods and a mean annual precipitation of about 2200 mm. Vegetation covers 94% of the area and consists of forest stands (74%), shrubs (10%) and mountain grassland (10%); the remaining 6% of the area is landslide scars and deposits without vegetation.
In 2004 the largest single landsliding area was interested by slope failures that generated then several debris flows along the main channel. In November 2003 the whole area was covered by aerial LiDAR data . This data is showing the situation of the slope before the reactivation of largest landslide. Terrestrial Laser Scanning, cheaper in data-acquisition, was not a practicable approach, because of the long distance from possible scan position towards the area of interest. The Riegl-Z620 is the first available scanner on the market offering a max. range up to 2000m in combination with high accuracy and high speed data acquisition. The measurement campaign was realized in spring 2008 after the snow-melting period.