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Hydrology of snow plays important role in arid countries like Iran. In this paper. distribution of torrent . inundation, avalanche are the .ljUbjects that have been carefully examined.
Wann weather in spring creates avalanches, therefore, it is of vital
importance to divise scientific methods to prevent destruction of nature from avalanche and torrent. Planting , artificial forest, uring wire screens . artificial avalanche explosion by canon would reduce the real danger of avalanche. (In figure 2 appropriate method. in slopes have been drawn).
Snow density in the cities and roads cause essential problems and the
mecessary equipment is needed to reduce the risks.