Modern Methods of Mapping Landslides. Case Study – The Iezer-Feredeu Landslide

Abstract

The landslides from the mountainous area, which have generated natural dam lakes,
have always attracted the interest of the researchers. In Romania, even if some of these landslides are
very old, they have not yet been thoroughly investigated. In this respect, the aim of the current research
is to present the results obtained by applying modern methods of mapping landslides on one of the
oldest Romanian landslide, Iezer-Feredeu (Sadova village). The results are very interesting especially
because there have been many discussion about using GPS in mountain forested areas. The area
affected by the landslide of Iezer Feredeu is a major one, having approximately 62 hectares and a height
difference of 337m, located in a less accessible area, mostly covered by coniferous forest with high tree
density. In these conditions, mapping the entire body sliding was possible due to the use of the GPS,
with which were taken approximately 1500 representative points from the field that were used to
generate a cartographic background with an equidistance of 5 and 10 meters. The method that we used
in researching the landslide from Sadova has proven to be a viable one and can be used furthermore in
other similar conditions.