Decoding urban sprawl in Nagaon, Brahmaputra Valley: a Shannon entropy and Gini coefficient analysis
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View abstract on PubMed
Summary
This summary is machine-generated.Urban sprawl in India
Area Of Science
- Urban planning and sustainable development
- Geospatial analysis and remote sensing
- Environmental science and land use change
Background
- Urban sprawl presents a significant challenge for sustainable development in mid-sized Indian cities.
- The Nagaon Urban Area (NUA) in Assam has experienced notable changes in land use and land cover.
- Understanding urban growth patterns is crucial for effective urban planning.
Purpose Of The Study
- To analyze the spatiotemporal patterns of urban sprawl in the Nagaon Urban Area (NUA) from 1993 to 2023.
- To assess the extent and nature of land use and land cover changes associated with urban growth.
- To provide insights for effective urban planning strategies to manage sprawl.
Main Methods
- Utilized Landsat TM and OLI satellite imagery from 1993, 2003, 2013, and 2023.
- Employed the Gini coefficient and Shannon entropy model to quantify urban sprawl.
- Applied landscape matrices (edge density, patch density, largest shape index, largest patch index) to analyze landscape patterns.
Main Results
- NUA exhibited significant land use and land cover changes, with built-up land increasing by 0.32 sq km annually and vegetation cover declining by 0.47 sq km annually.
- Urban expansion was predominantly observed in northern, northeastern, and western directions, characterized by edge expansion and leapfrog development.
- Shannon entropy increased from 4.70 to 5.90, while the Gini coefficient decreased from 0.71 to 0.55, indicating dispersed and decentralized urban growth.
Conclusions
- The study confirms significant urban sprawl in NUA, driven by dispersed and decentralized growth patterns.
- The findings highlight the need for integrated urban planning approaches to mitigate the negative impacts of sprawl.
- The methodology offers a novel approach for assessing and addressing urban sprawl in similar developing urban areas.
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