Monitoring land use change and measuring urban sprawl based on its spatial forms
| Autor: | Hadi Khani, Jamileh Tavakoli Nia, Hassan Mohammadian Mosammam, Asghar Teymouri, Mohammad Ali Kazemi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
lcsh:Geodesy
0211 other engineering and technologies Earth and Planetary Sciences(all) 02 engineering and technology 010501 environmental sciences 01 natural sciences Urban planning Urbanization Land use land-use change and forestry Environmental planning 021101 geological & geomatics engineering 0105 earth and related environmental sciences Pace lcsh:QB275-343 Land use business.industry Maximum likelihood classifier CA-Markov model Urban sprawl Shannon’s entropy Qom city Geography Agriculture Spatial forms of urban sprawl General Earth and Planetary Sciences business Land use/cover change |
| Zdroj: | Egyptian Journal of Remote Sensing and Space Sciences, Vol 20, Iss 1, Pp 103-116 (2017) |
| ISSN: | 1110-9823 |
| DOI: | 10.1016/j.ejrs.2016.08.002 |
| Popis: | As a response to the challenge of rapid pace of urbanization and lack of reliable data for environmental and urban planning, especially in the developing countries, this paper evaluates land use/cover change (LCLU) and urban spatial expansion, from 1987 to 2013, in the Qom, Iran, using satellite images, field observations, and socio-economic data. The supervised classification technique by maximum likelihood classifier has been employed to create a classified image and has been assessed based on Kappa index. The urban sprawl was also measured using Shannon’s entropy based on its primary spatial forms. To our knowledge, measuring urban sprawl based on its spatial forms would contribute to prioritizing policies and specific regulations in dealing with its dominant form. Finally, LCLU change and urban growth were simulated for 2022, using CA-Markov model. The results revealed that dramatic growth of built-up areas has led to a significant decrease in the area of agriculture, gardens and wasteland, from 1987 to 2013. The obtained relative entropy values have indicated that the Qom city has experienced increasing urban sprawling over the last three decades. The continuous linear and non-continuous linear developments along the major roads and highways are the dominant forms of sprawl in Qom city. The CA-Markov model estimated that this unsustainable trend will continue in the future and built-up areas will be increased by 10% by 2022 resulting in potential loss of 438.03 ha agriculture land, 638.37 ha wasteland, and 17.01 ha gardens. Those results indicated the necessity of appropriate policies and regulations particularly for limiting linear sprawl along the main roads. |
| Databáze: | OpenAIRE |
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