ارزيابي كارايي مدلهاي تجربي پهنه بندي خطر زمين لغزش (حائري - سميعي و مورا - وارسون) براي بررسي وضعيت شبكه جاده جنگلي طراحي شده در جنگل شصت كلاته گرگان

Evaluation the efficiency of experimental landslide hazard zonation models (HaeriSamiei and Mora-Varson) for considering designed road network in Shastkalate forest, Gorgan

Identification of susceptible areas to landslide occurrence is one of the basi c measures in redu ction of possible risk and hazard management. The ma in goals of this paper arc investigation on designed forest road network according to landslide hazard zonation and comparing applicability of two experimental landslide hazard zonation models (Haeri-Samiei and Mora-Varson) at the Shastkalate forests , Gorgan , By field work, the occurred land slides at the study area were gathered and recorded by GPS device. The elements for each mod el were generated and prepared in GIS. The landslide zonation for study area was done using mentioned models and their required factors . The efficiency of outputs of models was assessed by DR and QS indiees. The results showed that at the study area the Haeri-Samiei model with QS= / .251 had relative desirability compared to Mora-Varson model (QS= 0.586). In order to investigate on designed road network, the road network map was prepared. Based on results, using Haeri-Samiei model, situation of roads and rate of being at hazards were determined. Results showed that there are many of roads in high risk zones which should be des igned again by forest managers.