Detection and District Analysis of Urban Green Space Changes in The 22 Districts of Tehran

Roozbahani, Mehri; Janbaz Ghobadi, Gholamreza; Motevalli, Sadroddin; Azimi Amoli, Jalal

doi:10.30473/grup.2022.8708

Document Type : Science - Research

Authors

¹ Ph.D Student, Department of Geography and Urban Planning, Nour Branch, Islamic Azad University, Nour, Iran.

² Assistant Professor, Department of Geography, Nour Branch, Islamic Azad University, Nour, Iran.

³ Associate Professor, Department of Geography, Nour Branch, Islamic Azad University, Nour, Iran.

⁴ Associate Professor, Department of Geography, Nour Branch, Islamic Azad University, Nour, Iran

https://doi.org/10.30473/grup.2022.8708

Abstract

The main aim of this paper is to detect the ten-year changes in urban green spaces of Tehran metropolis, from 2010 to 2019, using the time series of Landsat 5, 7 and 8 images. The change detection was done in both annual and ten-year scale and the results are analyzed in two spatial scales; city level and municipal district-level. Detection of changes was done by a post-classification approach. The innovation of the study is efforts to reach the best results in the image classification step, for which in addition to optical and thermal bands' various features including some vegetation indices, water and built-up index, image texture components, and principal components were also used. Three classification methods including maximum likelihood, artificial neural network and support vector machine were implemented. The results indicated that the support vector machine has had the best result with 91.06% mean overall accuracy. The change detection showed a 10.58% decrease in the Tehran green spaces in the period under review. The greatest decrease, about 7.46 Km², occurred in the period 1390-91 and the largest increase was 7.61 Km² in the period 1394-95. Among the 22 municipal districts, regions 1 and 22 with 5.2 and 2.37 Km², respectively, have had the highest decrease in urban green space, and regions 2 and 19 with 0.5 and 0.47 Km², respectively, have had the highest increase.

Keywords

20.1001.1.25383930.1400.12.25.3.2

Main Subjects

Geography And Urben Planning

References

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Journal of Urban Ecology Researches

Detection and District Analysis of Urban Green Space Changes in The 22 Districts of Tehran

References

References

Volume 12, Issue 25 - Serial Number 4
Winter
March 2022
Pages 37-58

Detection and District Analysis of Urban Green Space Changes in The 22 Districts of Tehran

References

References

Volume 12, Issue 25 - Serial Number 4WinterMarch 2022Pages 37-58

Volume 12, Issue 25 - Serial Number 4
Winter
March 2022
Pages 37-58