Location of cities with emphasis on natural geomorphological hazards and limitations In Tehran province using hierarchical analysis method

Subject Areas :

Nader Moradi ¹ , Keramatullah Zayyari ²

1 - College geoghraphy - university of tehran
2 - Department geoghraphy university of Tehran

Received: 2020-10-20 Accepted : 2020-11-21 Published : 2020-11-21

Keywords: zoning, Urban Development, Tehran province, Hierarchical Analysis (AHP),

Abstract :

Every year, there are several events in the world that occur suddenly and cause damage to humans and the natural environment; They are known as natural hazards. These hazards, due to their unexpectedness, in most cases cause a lot of human and financial losses. Landslides and earthquakes are environmental hazards whose occurrence causes a lot of losses and damages. Earthquakes are likely to occur due to (return period). Therefore, identifying areas prone to earthquakes and landslides is very important to use methods to prevent or deal with the instability of areas to reduce the risk and risk of them. The purpose of this study is to locate cities with emphasis on geomorphological constraints. For this purpose, first, among the most important factors affecting earthquakes and landslides, 6 factors are the amount of slope, slope direction, geological material, distance from the fault, seismic acceleration and rainfall, the data of which were possible for all provinces of Tehran. They were classified based on engineering judgment in the GIS environment. In the AHP method, based on the layers, the information layers, weighting and combining were combined, and then the earthquake risk and landslide risk zoning map was prepared in the GIS environment. Therefore, landslide and earthquake hazard maps help designers and engineers to choose the right location for the implementation of development plans that the proper location for the implementation of sustainable development will not be possible without considering the limitations and its planning and management. The results of this study show that this province is the most threatened in terms of geomorphological limitations of landslides and earthquakes.