Using the natural environment of inside urban for protectingfacilities and equipment urban by passive defense approach(case study: Boroujerd city)

Boroujerd has been located in west of Iran. It have too valleys and hills ،also it has hard slope. the hard slope has limited housing in this city .But we can use from them as protection of natural land use and special urban equipment for example water , gas , oil sources and city is kept from outdoor threat (attack to jangle and etc) and indoor threat  vandalism.

this research is applied and the method research “descriptive – analytical."

the purpose of study is ,identity of suitable site for establishment of urban facilities with appropriate passive – defense measurements .So is used urban development plans and ,GIS, CAD and also is used two model "Holdern & Shannon entropy " and has been studied sprawl growth in boroujerd.

this research represent defense strategies, also it present final plan with determine specific points for locating facilities and equipment urban by using principle of passive defense.