The geomorphology is an important branch of natural Geography that its goal is promotion of human life, ultimately. The geomorphic processes have considerable impact on human life, and opposing, human activities and behaviors have its impacts on the geomorphologic units and geomorphologic processes, enhancing the above argument. The Gilan county, at its geographic position; embraced by two structural units; the Alborz-Talesh and Caspian sea, appears as a very good open space of morpho-dynamic formations and features. People of this region, on the track of new cultivation and industrial technologic products introduced, initiated a great changes in the Ecosystem, and due to low knowledge of Epigenic flow activities and sea level fluctuations of Caspian sea, they bother toweling and housing in the interior and exterior borders of the sea and rivers. This low knowledge of action and contractions of surrounding natural environment caused huge, bodily and financial damages to them in these hazardous yards.

The habitat development and establishment are directly related to the natural bedrock and geomorphologic complications. Due to topographical and geological conditions, the area under study has certain limitations in locating and developing human settlements. In order to reduce the hazards in the southeast of Khorasan Razavi province and modify plans for the development and establishment of human settlements, the feasibility of the area under study for residential development was investigated. After conducting library and field studies and selecting appropriate criteria, the fuzzy logic model was applied using the GIS software to identify areas for habitat development and establishment. In this study, to identify the potential areas for habitat development and establishment based on geomorphologic landforms, eleven parameters – including slope, slope direction, elevation, soil, land use, elevation, distance from fault, distance from river, distance from road, distance from settlement, and geomorphology – were used as independent variables in identifying geomorphological abilities and bottlenecks in the area. The results of zoning based on the fuzzy model showed that about 61% of the study area is located in very inappropriate and inappropriate classes, which means that geomorphological conditions in this part of the study area are unfavorable for the development and establishment of human settlements. About 14.58% of the study area has moderate conditions and about 24% of the study area shows favorable geomorphological conditions for construction activities and creation of new habitat areas. Alluvial fan units and alluvial plains are the most suitable sites for habitat development and establishment.