Scholarlink

<p>The environmental structure of Delhi, India, has changed significantly within the last two decades due to rapid urbanisation, which has caused significant concerns about land transformation, the health of vegetation, and long-term urban sustainability. The study examines the change in land use and land cover (LULC) in Delhi between 2000 and 2025 and explores it through a multi-temporal remote sensing and Geographic Information System (GIS) framework. The 2000, 2010, 2015, and 2025 Landsat images were examined to produce built-up maps, harmonised LULC classifications, as well as spectral indices such as the Normalised Difference Vegetation Index (NDVI) and the Normalised Difference Built-up Index (NDBI). The findings show that the settlement area increased significantly, by 60,065.92&#xa0;ha in 2000 and 76,704.76&#xa0;ha in 2025, whereas the barren/fallow land decreased significantly by 42,813.83&#xa0;ha to 8,679.84&#xa0;ha. Water bodies and vegetation were non-linear, and they portrayed the spatial complexity of environmental change in a fast-growing urbanising megacity. The patterns of Multi-temporal NDBI reveal the gradual urbanisation and growing dominance of the impervious surface, whereas NDVI outcomes reveal the fact that the state of vegetation has become more fragmented and spatially uneven, and the stronger green signatures are concentrated predominantly in the peripheral areas. The results indicate that the urbanisation in Delhi has involved both outward and internal reorganisation to impose substantial ecological restructuring in the urban environment. The study creates a new insight into the urban change in Delhi and proves the importance of monitoring using GIS to evaluate land cover dynamics and sustainability pressure in fast-growing cities.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Urban expansion mapping: an analysis of land cover change and sustainability in Delhi using GIS (2000–2025)

  • 期刊论文

  • 发表日期：

    2026年5月2日

查看全文
  • Vikrant Pachouri,
  • Jigyasa Parmar,
  • Prafull Kothari,
  • Rajesh Singh,
  • Anita Gehlot,
  • Amit Kumar Thakur,
  • Sudhanshu Dogra

摘要

The environmental structure of Delhi, India, has changed significantly within the last two decades due to rapid urbanisation, which has caused significant concerns about land transformation, the health of vegetation, and long-term urban sustainability. The study examines the change in land use and land cover (LULC) in Delhi between 2000 and 2025 and explores it through a multi-temporal remote sensing and Geographic Information System (GIS) framework. The 2000, 2010, 2015, and 2025 Landsat images were examined to produce built-up maps, harmonised LULC classifications, as well as spectral indices such as the Normalised Difference Vegetation Index (NDVI) and the Normalised Difference Built-up Index (NDBI). The findings show that the settlement area increased significantly, by 60,065.92 ha in 2000 and 76,704.76 ha in 2025, whereas the barren/fallow land decreased significantly by 42,813.83 ha to 8,679.84 ha. Water bodies and vegetation were non-linear, and they portrayed the spatial complexity of environmental change in a fast-growing urbanising megacity. The patterns of Multi-temporal NDBI reveal the gradual urbanisation and growing dominance of the impervious surface, whereas NDVI outcomes reveal the fact that the state of vegetation has become more fragmented and spatially uneven, and the stronger green signatures are concentrated predominantly in the peripheral areas. The results indicate that the urbanisation in Delhi has involved both outward and internal reorganisation to impose substantial ecological restructuring in the urban environment. The study creates a new insight into the urban change in Delhi and proves the importance of monitoring using GIS to evaluate land cover dynamics and sustainability pressure in fast-growing cities.