درخت حوزه‌های تخصصی

Today, the residents of urban areas try to spend some time in the natural quiet, original and intact environments to escape from the various types of environmental pollution that threatens them. Therefore, tourism is one of the phenomena that has affected the rural areas and especially the summer villages of Tehran in recent decades. The purpose of this study was to investigate the process of emergence and identification of environmental factors in the development of tourism around metropolis of Tehran. The method of this research is descriptive-analytical. For information gathering, field surveys (questionnaires) were used and 100 households were interviewed. The results show that the tourism of the studied villages dates back to the decades 1991s and 80s, so that in the 2001s, it had a growing trend, and a meaningful relationship between natural and human factors in the formation of this industry has existed. According to the findings of the research, it is suggested to identify the effects and environmental factors in the development of tourism structures in rural areas.

 Spatial expansion and land use changes in agricultural lands are among important factors contributing to environmental damages and disabilities of productive economy in the region especially in agricultural aspects. This trend is common in developing countries. These changes in land use usually occur by those who target agricultural lands for speculations and other abusing form of economy. In addition this trend also affects environment likewise economy and environment which is attributed as sprawl. Urumia Urban region gains valuable agricultural lands which plays a key role in in both environment and economy. In recent two decades according to excessive construction in the region these areas are turned out to be more of a recreational site for affluent families which has decreased agricultural functions there and also has damaged beautiful landscapes of the villages. Recent occurrence is resulted from not being cost effective agricultural activities and inefficiency of the market supplemented with not supporting agricultural activities. This has leaded that Urumia urban region go through a spatial expansion which differs considerably with urban sprawl. This paper is aimed to analyze effective factors on land se changes and the following sprawl by it. Moreover there are two main questions that should be answered: first is which factors contribute to spatial expansion in agricultural areas? How is attributed the sprawl dominating Urumia urban region? In order to analyze and producing status qua and current relationship between Urumia city and agricultural lands we used a descriptive and analytical method and in order to analyzing development process we went to the documents and finally in order to examine occurred changes we used from satellite photographs and cartographic photos in different periods. After gathering data and statistics and classification in the second stage by observing we tried to perfect the statistics. The results express that the absence cost effectiveness in agricultural activities and speculation in land and of course having nothing in common between users and speculators has resulted a new form of sprawl in Urumia which differs considerably with common forms of it. This new sprawl has features which sustains affluent interests.