Identifying and Prioritizing the Strategies for Reducing the Impact of Urban Areas Against Military Threats (Case Study: District One in Tehran Eleventh Region)

Urbanisation and the development of metropolitan centres on the one hand and their exposure to the threat of war and military attacks, on the other hand, have caused lots of damages, casualties and economic and social cost for them. Considering the strategic place of Iran in the region and the world is one of the best ways to decrease urban area vulnerabilities when at the time military threat is the passive defence. Whereas, urban land use planning plays a critical role in urban planning as far as some times urban land use planning has been called urban planning. Therefore, according to the above, urban management by using complementary approach in urban planning can decrease threats and provide safety and security for cities. Changes resulting from the concentration of economic, social, cultural and political activities in cities, as well as the lack of attention to the features of a safe and ready environment against military threats in recent decades, have decreased vulnerability of today's cities as a living environment for people to achieve Sustained urban living in times of crisis. Based on this, urban planning seeks to improve the quality of life of residents and build a safe and secure city for living in all circumstances, especially in times of crisis, which is the way to achieve this by defence the principles of non-operational defence to reduce the vulnerability of cities in times of military threats. Therefore, in this research, the factors affecting urban vulnerability to military threats are identified based on the concept of passive defence and are measured in Tehran metropolis as the capital of the country's political and economic capital. In this research, District 1, District One in Tehran's Eleventh Region has been used as a study area. District one of zone eleven of Tehran city is the case study of this research. This area has introduced as one of the main parts of city defence core in Tehran master plan, and the specific feature in this area is the wide variety of uses and function. Crucial political and administrative functions located in this area has resulted in the political and security importance of the area, and it has always been mentioned as one of the strategic parts of Tehran.

The methodology of this research is based on explanatory-analytic study and data collection and has been done through library method and questionnaires. Also, for analysing information, ARCGIS, SPSS and EXPERT CHOICE software have been used, and the AHP method has been used to weigh out non-operational defence indicators and Friedman test to prioritise vulnerability reduction strategies in the event of military threats.The main goal of the current study is that identifying and prioritising the Strategies for Reducing the Impact of Urban Areas Against Military Threats in District One in Tehran's Eleventh Region. To these aims, first of all, a review of important terms of the research has been done and based on that, effective criteria and indicators in urban land use planning which can reduce urban vulnerability has been identified. Then, data and base map were extracted from documents and master or detailed plan of Tehran and considering the Geographic data bank related to each sub-criteria in GIS, input layer of each of them has been provided. In next step, thematic Map of vulnerability of the case study based on every sub-criteria has been mapped out and at the end of this step, all of these map has been overlaid in order to identify case study vulnerability.

The results show that population distribution criteria (weight: 0.230), physical characteristics of the body and form (weight: 0.221), and user compatibility (weight: 0.147) obtained the highest weight among vulnerability criteria, and 68% of the sample level It has a moderate upward vulnerability to military threats. Also, the most important strategies to reduce vulnerability to military threats were, respectively, the development of multi-user applications in the area of organising cultural and religious uses (W7O8), organising and locating green and open spaces in the area for defining crisis support centres. (W6O5) And attention is given to creating safe spaces within the (S4O4) area. In addition some strategies can be useful in order to Reduce the Impact of Military Threats such as regeneration and redevelopment with emphasis on residential area which is located in north and west of the site, safe spaces development, restriction of trans-regional land uses, reduction of sensitive land uses, developing emergency land uses, eliminating incompatibility of land uses in the area, sending out the harmful land uses and developing multi-functional land uses. The results show that population distribution criteria (weight: 0.230), physical characteristics of the body and form (weight: 0.221), and user compatibility (weight: 0.147) obtained the highest weight among vulnerability criteria, and 68% of the sample level It has a moderate upward vulnerability to military threats. Also, the most important strategies to reduce vulnerability to military threats were, respectively, the development of multi-user applications in the area of organising cultural and religious uses (W7O8), organising and locating green and open spaces in the area for defining crisis support centres. (W6O5) And attention is given to creating safe spaces within the (S4O4) area. In addition some strategies can be useful in order to Reduce the Impact of Military Threats such as regeneration and redevelopment with emphasis on residential area which is located in north and west of the site, safe spaces development, restriction of trans-regional land uses, reduction of sensitive land uses, developing emergency land uses, eliminating incompatibility of land uses in the area, sending out the harmful land uses and developing multi-functional land uses.