Monitoring Land Use Change Emphasizing Physical Urban Development of Tehran, Using Remote Sensing and GIS

Surveying urban land use and cover and process of its changes is one of the important subjects and challenges in land management field and urban sustainable development. Physical development of cities and spreading its range is one of the important factors in urban land use changes which have variety environmental, economic and social impacts. In several past decades, Tehran city has been encountered with urban growth and development and several around towns that the subject has caused variety changes in urban lands of Tehran and around area. Surveying and analyzing urban land changes in Tehran city could be useful in land use planning. In this research Tehran land use changes in the past few decades have been examined.
In this research, the changes are surveyed and detected by satellite images of 7 bands TM sensor of Landsat satellite from 1988 to 2010 and three time period 1988, 2000 and 2010. For this purpose, the images from TM sensor of satellite images related Tehran and around area have been used. Before preprocess states, the images have been classified based on urban lands classes including urban, agriculture, water, jungle, rangeland and bare land in ENVI software and analyzed based on image difference and comparing post classification methods.
  Results show that in the period, urban lands has grown gradually and constantly and bare land also is increasing in a very low scale. Also rangeland has been decreased in past decade, but agriculture lands, in spite of decreasing than 1988, are faced increasing since 2000.
In generally, because of developing industrial, military and tourism activities in around of the city, area of rangeland and agricultural lands is decreased and city area is increased which has different environmental and cultural impacts (mainly as negative impacts) in circumstance of the city.