Document Type : Research Paper

Authors

• Sima Poorhashemi ¹
• Ali Asanlu ²
• Mohammad Reza Mansoory Daneshvar ³
• Hamid Nejad Soleimani ⁴

¹ Ph.D student of geomorphology, Hakim Sabzevary University

² Faculty member in University of Disciplinary Sciences

³ Ph.D student of climatology, University of Sistan and Baluchestan

⁴ M.Sc Geomorphology, Islamic Azad University, Mashhad Branch

Abstract

Neighboring of Khorasan Razavi province with the two countries of Afghanistan and Turkmenistan, besides creating cultural and economic consequences in the border towns, has faced them with security challenges, especially in the context of strengthening the urban passive defense. One of the most importantfactors related to the security challenges in these border towns is the lack of full identification of geographical factors especiallytopographic and geomorphological characteristics in the formulation of the principles and strategies of urban passive defense. Identifying environmental capabilities and constraints can playa more effective role in the principles of designing and passive defense in these cities. The topographic study of border regions and border towns is of particular importance which, If neglected, potential capabilities in security utilities for the creation of sensitive military centers of the country will be neglected too, and it will also increase the vulnerability of human societies and the physical structures of these cities over time.Zavyn city in North Khorasan provinceis considered as one of the towns close to the borderwith special topographic features. The main objective of this researchis to investigate the topographic and geomorphologicalcapabilities of the region with the passive defense approach and to analyze the security challenges and topographic problems of the study area using GIS and providing strategies based on the passive defense principles for the use of natural environment capabilities. From the results of this research, it can be noted that the formation of the urban shape in the present dispersed and decentralized dimensions of the city of Zavin is such that, the triple cores of the city from the defense perspective by strengthening and empowering of the texture as well as the conversion of the linear paths of access to the network graph In the current situation will be acceptable

Keywords

• Border cities
• Passive defense
• topographic capabilities
• Security challenges
• KhorasanRazavi Province

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