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Land hazards and Geomorphic hazards are ones of the most important natural hazards that annually cause financial looses and health damages in all countries of the world, especially in Iran. These disasters damage infrastructures, important roads and facilities and cause asset losses, disrupting planning, increasing fatalites and injuries. Therefore, rating the vulnerability of habitats is very important for managing  risks and reducing damages that caused by it, so this issue is one of the priorities of each country. In this study, 3 geomorphical hazards that are including Landslide (using Entropy model), Earthquack (using AHP model) and Flood are considered. Finally by using Taxonomic model the townsips of Fars province basis of vulnerability are ranked and Kazeroon, Lar, Shiraz and Neiriz, respectively, are at the greater risks, also there is a relationship between geomorphic charactristics and geomorphic hazards that it could damage these regions so according to the results all Landslides are occurred in convex regions and 80 percent of Earthquackes are occurred in convex regions. A bout Flood hazard, 90 percent of Flood zones are overlayed on concave. so it can be concluded that the convex domains are more vulnerable to earthquake and landslide and concave slopes are more vulnerable for floods.
 

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One of the main reasons for the occurrence of landslides is the mismanagement of the earth, especially in mountainous regions and valleys. In this research, we tried to investigate the factors affecting the occurrence of landslides and also comparing sections of Kuhdasht city in terms of landslide susceptibility in the form of multi-criteria decision making method (ELECTRE-1), areas with high risk of landslide hazard. The application of multi-criteria electric methods is in the ranking. The model (ELECTRE-1) evaluates the decision matrix, which includes m options and n indexes. In this research, the choices, parts of the city of Kuhdasht, and indicators are the factors influencing the occurrence of landslides. After weighing, comparing the pair and calculating the final weight of the factors, it was found that the gradient factor with a weight of 0.379 and a petrology with a weight of 0.248 have the main role in the sensitivity of the study area. The area was also assessed for the extent of the vulnerability to landslide. According to this assessment, Tarhan and Romeshgan sections (with the number of domination 2) have the highest risk for the occurrence of landslides and then, respectively, sections of Kohnani (with the number of domination 1), the Darbe gonbad and Central (Without the number of domination). The average weight of the factors according to the harmonized criteria is for the sections of Tarhan (0.427), Romeshgan (0.0412), Kohnani (0.359), Darbe gonbad (0.0253) and central (0.217). Among the factors that cause the sensitivity of the parts of the Tarhan and Romeshgan, the percentage of sensitive slopes (15 to 45 degrees), the petrographic situation (with the overcoming of lime and marl), the use of inappropriate land and hydrographic network can be mentioned.