عنوان مقاله [English]
نویسنده [English]چکیده [English]
Elevation models, a numerical expression of the continuous changes in ups and
downs, are capable of demonstrating roads at their actual positions, and facilitate the
possibility of mountain roads management. These models are also capable of
computing the potential of natural risks by means of satellite pictures, and can prove
useful in decreasing road accidents.
For the present study, the author selected part of Chaloos Road, from Karaj to
Kandovan, where numerous accidents have occurred. As this part of the road is
situated within the drainage basin of Karaj (Amir Kabir) Dam, the study drew on the
elevation model (DEM) of this basin, which was extracted from satellite (SRTM)
pictures. From this model, hillshade layers were extracted, and layers of adjustment
curve, drainage system, gradient, gradient direction, and route of the largest gradient
were prepared. Moreover, this part of the road was extracted from a map at a scale of
1:50000, and was placed in the above set of layers after being benchmarked. Following
analyses, the potential of natural risks on this road was assessed.