Water Resources
CBSE · Class 12 · Geography
Quick revision notes for Water Resources — CBSE Class 12 Geography. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
India's Water Resource Endowment
- India covers 2.45% of world's surface area but has only 4% of world's water resources while supporting 17% of world's population
- Total annual precipitation in India: 4,000 cubic km
- Available surface water and replenishable groundwater: 1,869 cubic km
Surface Water Resources
- Four major sources: rivers, lakes, ponds, and tanks
- About 10,360 rivers and tributaries longer than 1.6 km each
- Mean annual flow in all river basins: 1,869 cubic km
Groundwater Resources
- Total replenishable groundwater: 432 cubic km
- High utilization in northwestern regions and parts of South India
- Very high utilization: Punjab, Haryana, Rajasthan, Tamil Nadu
Sectoral Water Utilization
- Agriculture dominates water usage: 89% surface water, 92% groundwater
- Industrial sector: 2% surface water, 5% groundwater
- Domestic sector: 9% surface water, 3% groundwater
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Water Resources covers several key topics that are frequently asked in CBSE Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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