The Effect of Government Programs on Urban Sprawl of Tehran

The urban sustainable development is economic efficiency، social justice and environmental preservation so one of the its important conditions is utilization from urban land، otherwise cities suffer from urban sprawl. So far، several models are presented for understanding the form of city and its dispersion measure. This research attempts to analyze urban spraw lof Tehran by different models such as urban density، the quartile distribution، temperature distribution، balance، concentration and temperature Holdrn model in different decades، and then considers the impact of government programs for different factors of urban sprawl. Reslts showed that with the lack of efficient management of land and illegal discrimination in Tehran there is urban sprael. Therefore، according to the principles of sustainable urban development Tehran can push toward sustainability. But، policies can control further spread of this phenomenon in Tehran and in all cities of the country.