NCERT Class 12 Geography India -People And Economy: Chapter 4 — Water Resources
This chapter of NCERT Class 12 Geography, "India - People and Economy," focuses on Water Resources. It highlights India's water availability, accounting for 4% of global water resources despite having 17% of the population. The chapter details surface water sources like rivers, lakes, and ponds, noting that only a fraction of the total flow is usable. It discusses the significant demand for water in agriculture, which dominates both surface and groundwater utilization. The text also covers groundwater resources, their uneven distribution, and the high utilization rates in certain regions, warning of potential scarcity and social disruption if current trends continue. The chapter emphasizes the need for efficient water management and conservation for sustainable development.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 12 |
| Subject | Geography |
| Book | India -People And Economy |
| Chapter | Chapter 4 — Water Resources |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 5 minutes |
| Word count | 986 |
Learning outcomes
- Understand the distribution of water resources in India.
- Analyze the sectoral utilization of water, particularly in agriculture.
- Identify the challenges related to water scarcity and pollution.
- Learn about the importance of water conservation and management.
Vocabulary
| Word | Meaning |
|---|---|
| Demographic transition | The shift from high birth and death rates to low birth and death rates. |
| Surface water | Water found on the Earth's surface in rivers, lakes, ponds, and tanks. |
| Groundwater | Water held underground in the soil or in pores and crevices in rock. |
| Catchment area | The area from which surface water drains into a river or river system. |
| Utilisable water | The portion of water resources that can be practically used for beneficial purposes. |
| Irrigation | The artificial application of water to land or soil to assist in growing crops. |
| Brackish water | Water that has more salinity than freshwater but not as much as seawater. |
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Practice questions
- What percentage of the world's water resources does India account for? Answer: India accounts for about 4 per cent of the world's water resources.
- Name the four major sources of surface water in India. Answer: The four major sources of surface water are rivers, lakes, ponds, and tanks.
- Which sector accounts for the highest percentage of surface and groundwater utilization in India? Answer: Agriculture accounts for the highest percentage of both surface (89%) and groundwater (92%) utilization.
- In which regions of India is groundwater utilization very high? Answer: Groundwater utilization is very high in the river basins lying in the north-western region and parts of south India, specifically in states like Punjab, Haryana, Rajasthan, and Tamil Nadu.
Practice MCQs
Q1. Approximately what percentage of the Earth's surface is covered by water?
Explanation: The text states that approximately 71 per cent of the earth's surface is covered with water.
Q2. What is the total utilisable water resource in India estimated to be?
Explanation: Out of the total available surface and replenishable groundwater, only a portion is utilisable, leading to a total utilisable resource of 1,122 cubic km.
Q3. Which of the following rivers have a significant portion of their annual water flow yet to be harnessed?
Explanation: While south Indian rivers have been largely harnessed, the Brahmaputra and Ganga basins still have much of their annual water flow to be utilized.
Q4. What is the primary reason for the high priority given to irrigation development in India's Five Year Plans?
Explanation: As India has traditionally been an agrarian economy, irrigation development has been prioritized to boost agricultural production.
Q5. Which states have very high groundwater utilization rates?
Explanation: The text explicitly mentions Punjab, Haryana, Rajasthan, and Tamil Nadu as states with very high groundwater utilization.
Frequently asked questions
What is the total water availability from precipitation in India annually?
The total water available from precipitation in India in a year is about 4,000 cubic km.
What are the main sources of surface water in India?
The main sources of surface water in India are rivers, lakes, ponds, and tanks.
Which sector uses the largest share of water in India?
Agriculture is the largest consumer of water, accounting for 89% of surface water and 92% of groundwater utilization.
Why is irrigation crucial for Indian agriculture?
Irrigation is crucial due to the spatio-temporal variability in rainfall and the prevalence of drought-prone areas in India.
Which states show very high groundwater utilization?
States like Punjab, Haryana, Rajasthan, and Tamil Nadu exhibit very high groundwater utilization.
What are the potential consequences of continued high water demand and utilization?
If the present trend continues, it can lead to water scarcity, detrimental effects on development, and cause social upheaval and disruptions.
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NCERT Class 12 Geography — India -People And Economy — Chapter 4 — Water Resources. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.