Abstrakt
For several decades avalanche run-outs are subject to exhaustive research because of their importance in land use planning. Recent advances in GIS and availability of spatial data enable to perform analyses which help to make decisions concerning spatial planning within avalanche prone locations.
Estimating avalanche run-outs is crucial step in the avalanche zoning process. The main objective of this work is to develop method for outlining the avalanche paths based on computer simulations running in GIS environment.
The process consists of two parts: estimation of avalanche release zones and determination of avalanche run-outs. Primarily avalanche release zones were estimated by using an existing model proposed by Hreško.
The model was modified and calibrated with the use of avalanche data extracted from avalanche database. The alpha-beta regression model developed in Norway is used to estimate avalanche run-outs.
Avenue script enabling automated estimation of run-outs was implemented into ArcView, Computer simulations run on ArcView, ArcInfo and SAGA. Finally the results of the model calculation were visually assessed and compared with avalanche cadastre map.