Mahyar Kolyaei - Graduate student at PNU University of Tehran. Member’s Urban Planning Society ,usa.
Nima Sadeghzadeh - Tutor, Department of art & architecture, Payam Golpayegan, Isfahan ,Young Researchers Club Elite, Central Tehran Branch, Islamic Azad University, Tehran, Iran .Member’s new urbanism, California , usa.
Hadis Mirzaei - Graduate student at Payam University Golpayegan . Member’s Urban Planning Society, usa.

After World War II, the growing trend of urbanization, an increase in the phenomenon of migration to the cities, policies adopted in the field of housing and existing restrictions in cities was led to the making spread of residential Settlements, that of this among can be mentioned to the dormitory settlements that were made for certain groups of people such as workers Group. Many factors affect on the location and formation pattern of settlements land in order to achieve sustainable development, it is essential to pay attention to these factors.Hence attention to effective yardstick on the location of settlements land on the basis factors of the social welfare and economic prosperity and on the basis environmental and ecological effects approach is valuable. This study seeks to that existing land locating in the twon by using compatibility criteria, comfort, utility, performance, safety and health, scrutinized and scrutiny and then to particular ecological and environmental impact of locating and construction of town , the analysis gives. As a result with residential twon selection of South Pars belong to south pars company of Assaluyeh located at Bushehr province of Iran has paid to this matter. In an applied research to rely on the documenting method and on a process step by step and develop the assessment table with regard to not equal of weight and importance of each criterion, with determine the weight of criteria, lands locating of the South Pars twon analyzed, and by using AHP Model to evaluate the ecological and environmental impacts's of locating. Based on an assessment done from the pattern of locating, from 100 points, 92/10 points are accrued to the town. Also the results showed which respectively the water pollution and noise pollution, had have maximum and minimum impact on the environment.

criterion, locating, Settlement, ecological effects, environmental, AHP