چکیده:
Today، with the rapid growth of urban population and as a result، rapid and unbridled urbanization of human societies have been caused some issues. In Gorgan، an increase in level of urban settlements is done regardless to the capabilities and limitations of land and ecological potential of urban development. In this study، it is performed to evaluate and conform to urban development، regard to ecological capability to protect the environmental ability of Grogan. In this case، the multi-criteria assessment approach with weighted linear combination of the GIS is performed to evaluate the ecological capability of Gorgan for conformity to urban development in different years based on the criteria. Then، there is a comparison between final map of capability and current development; moreover، the rate of conformity in different years is calculated. It is illustrated that the ecological conformity had been decrease gradually from 1987 to 2013، which causes hazardous effects on the environment that seems to be still remain for years. Therefore، reduction of the ecological noncompliance should be considered by relevant authorities. The outputs could be used for urban planners to observe the environmental principles to promote existing conditions.
خلاصه ماشینی:
To this end, using an index-based assessment approach with a weighted linear combination method, the ecological capacity of Gorgan for compatibility with urban development was evaluated in different years within a Geographic Information System environment.
This research aims to investigate the level of ecological compatibility for preserving the environment by employing criteria consistent with environmental considerations in Makhdoom's ecological model and weighting them, to assess the environmental capacity for determining suitable areas for urban development of Gorgan.
Identifying Criteria In this research, after library studies and reviewing scientific sources, 13 factors – distance from surface river, slope, soil texture, landform, wind speed, geographical direction, distance from forest cover, distance from qanat, distance from wells, distance from fault, average annual rainfall, average annual temperature, and altitude above sea level – were selected based on Makhdoom's ecological model (1390) and the expert opinions of several professors at the University of Agricultural Sciences and Natural Resources of Gorgan.
Research Findings As mentioned in the methodology section, after determining the criteria and constraints in the first step and then preparing the related maps, in the third step they were used with standardized fuzzy functions and in the fourth step, according to Table 6, the criteria were weighted using the weighted analytical hierarchy process method, where the weights indicate the relative importance of each parameter in suitability and determining the ecological potential of urban development.
084 In the next step, using the weighted linear combination method to assess the ecological potential of urban development The standardized maps, including factors and constraints, were combined in the Idrisi environment by applying the coefficients resulting from the analytical hierarchy process.
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