UPSC Mains — Previous Year Question
Question
Analyze the major drivers of human-induced land-use changes in India and their geographical consequences.
Model Answer
Human-induced land-use change reflects the dynamic relationship between development and land, as agriculture, urbanisation, infrastructure, and resource extraction continuously reshape India’s geographical landscape.
Major Drivers of Land-Use Change
- 1. Urbanisation and Peri-Urban Expansion: Demographic growth, real estate demand, and urban sprawl convert agricultural land, wetlands, and scrublands into built-up areas.
- Data: NRSC’s LULC Atlas shows built-up area increased by 30.77% between 2005–06 and 2022–23.
- 2. Agricultural Expansion and Intensification: Food demand, irrigation, and multiple cropping alter cropland and grazing-land patterns.
- Data: Gross Cropped Area rose from 201.3 million ha in 2013–14 to 217.8 million ha in 2023–24, while cropping intensity increased to 156.8%.
- 3. Infrastructure-Led Development: Expressways, dedicated freight corridors, dams, and transmission lines clear contiguous forest corridors and fragment natural landscapes across Central India and the Himalayas.
- 4. Mining and Mineral Extraction: Open-cast mining replaces forests, agricultural land, and water bodies with mines and overburden dumps.
- Studies: Remote sensing of Central Indian coalfields documented forest losses of 7.3% to 17.6% and water-body losses of 5% to 10% due to mining.
- 5. Industrialisation and Economic Corridors: Industrial clusters create demand for large contiguous land parcels, accelerating rural-to-urban and agricultural-to-industrial land conversions (e.g., across Delhi-NCR).
- 6. Changing Agricultural Economics: Declining farm profitability, groundwater stress, and market shifts encourage conversion to non-agricultural uses.
- Data: India’s agricultural land share declined from 66.7% in 1950–51 to 58.6% in 2023–24.
- 7. Tourism and Recreational Development: Unplanned resort construction, commercial roads, and slope cutting alter fragile slopes across the Himalayas and Western Ghats.
Geographical Consequences
- 1. Habitat Fragmentation & Biodiversity Loss: Converting contiguous forests creates isolated ecological patches, disrupting wildlife movement and intensifying human-wildlife conflict.
- 2. Loss of Productive Farmland: High-fertility agrarian belts surrounding growing cities are permanently converted to built-up surfaces.
- Data: NRSC found that 35% of newly built-up land between 2005–06 and 2022–23 came from identified wasteland and agricultural categories.
- 3. Altered Hydrological Regimes: Concretisation and wetland loss reduce aquifer infiltration, accelerate runoff, and cause severe urban floods (e.g., Bengaluru, Chennai, Gurugram).
- 4. Soil Degradation and Erosion: Deforestation, intensive tillage, and mining accelerate topsoil loss, salinization, and desertification.
- 5. Micro-Climatic Changes: Replacing vegetation with concrete and asphalt lowers surface albedo and increases thermal storage, driving the Urban Heat Island (UHI) effect.
- 6. Loss of Ecosystem Services: Degrading forests and wetlands impairs carbon sequestration, groundwater recharge, and natural flood buffering.
“Land is finite, but its competing demands are expanding.” India needs integrated, GIS-based land-use planning to balance industrial growth with the protection of prime farmlands, wetlands, and ecological corridors.