AIRBORNE LASER SCANNING (LiDAR) OF IDRIJA AND RAVNE FAULTS IN WESTERN SLOVENIA
Abstract
Airborne laser scanning, or LiDAR, is a relatively new method of remote sensing which is used to build very detailed digital elevation models with a resolution of a few meters. Since some laser beam pulses reach the ground even in areas covered by forest, it is also possible in this case to construct the bare ground elevation model, which is not possible with other techniques such as photogrammetry. This is very valuable in geomorphologic analyses of active faults in forested terrain, in order to study their seismotectonic characteristics and to assess the earthquake hazard. The method was successfully applied to study the tectonic characteristics of Idrija and Ravne faults in Western Slovenia. This was the first application of airborne laser scanning for the purpose of mapping active faults in Europe. On the Idrija fault, with the help of the data collected we identified the area suitable for further paleoseismological investigations and on the Ravne fault, we obtained new data about its segmentation. Both are important for understanding past seismicity and assessing the seismogenetic potential of the two faults.
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