مقايسه كارآيي دو مدل پهنه بندي خطر زمين لغزش (حايري و مورا) درآبخيز سياه رودبار - گرگان

Comparing applicability of two landslide hazard zonation models in Cia-Rudbar watershed, Gorgan

Identification of areas susceptible to landslide occurrence is on of the basic measures in reduction of possible risk, and hazard management. The main aim of this paper was to compare applicability of two landslide hazard zonation models (named Haeri- Samiee model, and Mora-Varson model) in CIARudbar watershed-For this purpose hazard map prepared for each of the models as a raster choropleth map at 1:50000 scale, and 1 x 1 grid cellsize (estimated of relative hazard). Also current landslides were identified by type and morph metric dimensions, and finally mapped as landslide inventory map as ground thruth (hazard reference) through field works. Research results show that there is a significant correlation at the 0.01 level (p <0.01) between potential hazard values, and classes and the landslides number area, and the multiplication of the number, and area in each cell in the H.-S. Model. But there is not a significant correlation in the M.-V. Model. Therefore H.-S. Model is the suitable model for the study area and provided hazard map has high spatial compatibility to the current landslide inventory map.