Evaluation of efficiency of landslide hazard zonation methods on SeyedKalateh Ramian basin

Nowadays, occurrence of mass movement in the northern forests ofIran, especially in the Golestan province is turning to be a usual phenomenon. Because of decay of vegetation cover, prediction of landslide occurrence will prevent its damages. Landslide hazard zonation is a suitable way in this case. Selection of the best model is a way to decrease costs and time. Consequently, land slide hazard zonation with best models will cause getting better results. In this study, capability of two experimental models including Mora-Varson and Haeri-Sameai methods, a statistic model together with relative effect model have been tested for land slide hazard zonation in the Seyed Kalateh watershed at Ramian, Golestan province, using Sum of Quality for evaluation of efficiency of landslide hazard zonation methods. Results showed that relative effect method could better separate the hazard zones compared to other used methods. Comparing the experimental methods, Haery method is more effective than the Mora method.