Assessment of Shahre Rey Fragmentation Trend Using Metrics

Document Type : Research Paper

Authors

1 MSc. Holder, Department of Environment, Faculty of Environment, Islamic Azad University, Science and Research Branch, Tehran, Iran

2 Professor, Department of Environment, Faculty of Environment, Islamic Azad University, Science and Research Branch, Tehran, Iran

3 Associate Professor, Department of GIS, Faculty of Geography, Islamic Azad University, Science and Research Branch, Tehran, Iran

4 Professor, Department of Geography and Urban Planning, Faculty of Geography, Islamic Azad University, Science and Research Branch, Tehran, Iran

Abstract

Land use in Shahre Rey has experienced unprecedented growth in urban areas in recent decades. Land use changes affect social, economic, and environmental conditions. Gathering information about these changes is essential for better planning and management of urban areas in sustainable development. Consequently, the object of this paper is to better examine the Shahre Rey land use changes affected by urban development and to investigate urban landscape integrity using the 1988-2018 "Fragmentation" index. Moreover, it was intended to provide solutions for the determination of hot spots based on appropriate criteria. With the help of Landsat satellite images, four land uses – including urban landscapes, agricultural lands, green spaces, and barren lands – were extracted and the extent of land use changes was determined. In order to investigate the fragmentation of Shahre Rey landscape, the metrics of the number of patches, patch density, and the largest patch were used. Cross-Tab was also used in a part of the study. The results showed that the land use areas of ​​urban lands and urban green space had increased by 369.7 and 55.6 hectares, respectively, while agricultural lands and barren lands had decreased by 213.8 and 211.5 hectares, respectively. In urban land use, integration had increased. In the green space and agriculture land uses, fragmentation has increased due to the creation and construction of roads. Based on the criteria of  "position relative to borders and roads as well as the area and size of patches,'' solutions were made to determine the "hot spots" of vegetation and residential areas to help making plans for the improvement of their conditions. The reason is that land use change, especially the loss of vegetation, has a negative impact on the landscape.

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Town and Country Planning
Volume 13, Issue 1
Spring & Summer
April 2021
Pages 1-20

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History

  • Receive Date: 10 January 2021
  • Revise Date: 28 April 2021
  • Accept Date: 28 April 2021

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