Hashem Dadashpoor; Mojtaba Refieian; Nariman Jahanzad
Abstract
There exist three major approaches to land use: economic-oriented approach, an egalitarian approach, and sustainable development. In recent few decades, sustainable development theory and subsequently the ecological approach has become the dominant paradigm in the land use planning thought. In this approach, ...
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There exist three major approaches to land use: economic-oriented approach, an egalitarian approach, and sustainable development. In recent few decades, sustainable development theory and subsequently the ecological approach has become the dominant paradigm in the land use planning thought. In this approach, land use planning is a reasonable use of land which is based on the maintenance of green lands and environment generally. In Mashhad metropolitan area in recent years, the uncontrolled growth of urban settlements has led to the deterioration of agricultural lands and pastures. So, in this study, it is attempted firstly to determine an optimal ecological land-use pattern on the basis of the ecological approach. Secondly, the pattern was compared to the existing land-use situation. For this purpose, Makhdum’s method was applied and data were processed using the AHP model in ArcGIS 9.3. For this purpose, twelve natural criteria were chosen, and based on Saati’s table we assigned weights to them. Then, based on the mentioned twelve criteria, twelve suitability maps were generated. Finally, using mathematical overlaying, the layers were merged together and the final optimal pattern was introduced. The results of the present study indicated that the existing land-use situation is not in accordance with the optimal land use pattern and this could lead to irreparable environmental, economic and sociological damages. Thus, it is necessary to remind that planning authorities should think about controlling the growth of the city and consider some arrangements for urban development and management of the region.
Mohammad Karimi Firozjaei; Majid Kiavarz; Mohsen Kalantari
Abstract
Nowadays, interlinking of structural, social, environmental and economic aspects of cities is a major problem which results from unplanned horizontal expansion of cities and their land-use changes. The purpose of the present study is to investigate the land use changes and physical expansion of Babol ...
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Nowadays, interlinking of structural, social, environmental and economic aspects of cities is a major problem which results from unplanned horizontal expansion of cities and their land-use changes. The purpose of the present study is to investigate the land use changes and physical expansion of Babol city during the last 30 years and to predict the land use change’s trend for the future. To do so, Landsat multi-temporal images of 1985, 1992, 2000, and 2015 were used. The maximum likelihood algorithm was applied for classification of land use and cross tab model was used for investigation of land use changes. The scattered expansion of the city was examined through Shannon’s entropy index. Moreover, the CA-Markov model was applied to predict the land use change’s trend as well as the physical expansion of Babol city. Results of the present study confirmed the extreme physical expansion of Babol city during the last three decades. Such an expansion was the main reason for degradation of agricultural lands and green spaces around the suburbs. The growth rate of the built-up areas was 92%. The more distance from the built-up areas the less changes occurred in land uses. Also, the Shannon entropy index was increased from 0.73 in 1985 to 0.8 in 2015 which is an indication of the scattered expansion of the city. It can be predicted that besides decreasing 704 hectares of agricultural areas, a 33% growth will be occurred in built up areas from 2015 to 2040. It consequently requires the specific attention of urban managers and planners.
