Questions
3 questions per board exam
Difficulty
Easy
Importance
Core — never skip
Overview
Water Resources focuses on the availability, management, and conservation of freshwater in India. It is a critical topic in the Geography curriculum that requires students to understand the transition from traditional water management to modern multi-purpose river projects and the urgent need for sustainable harvesting.
Water Scarcity and Need for Conservation
Water scarcity is primarily caused by over-exploitation, excessive use, and unequal access among different social groups. It is not just a lack of physical supply but often a result of poor management and industrial pollution.
- Hydrological cycle ensures renewable water supply
- Water stress occurs when availability is less than 1000 cubic meters per person per year
- Pollution from domestic and industrial waste degrades water quality
- Over-extraction for agriculture lowers groundwater levels
Multi-Purpose River Projects (Dams)
Known as the temples of modern India, dams serve multiple purposes including irrigation, electricity generation, and flood control. However, they are increasingly controversial due to social and environmental displacements.
- Jawaharlal Nehru coined the term temples of modern India
- Dams regulate and dam river flow for controlled distribution
- Negative impacts include fragmentation of rivers and obstruction of aquatic migration
- Narmada Bachao Andolan is a major protest movement against large dams
Rainwater Harvesting
Rainwater harvesting is a traditional and modern method of storing surface and groundwater for future use. It is emphasized in exams as the most viable sustainable solution to India's water crisis.
- Khadins and Johads are traditional methods in Rajasthan
- Guls and Kuls are diversion channels used in Western Himalayas
- Tankas are underground storage tanks built in house courtyards
- Roof top rainwater harvesting is mandatory in many states for new constructions
Exam Tip
When writing about dams, always provide a balanced view mentioning both the 'economic benefits' and the 'ecological costs' to ensure full marks.
Common Mistakes
- Confusing the specific names of traditional harvesting methods from different regions like Guls vs. Khadins.
- Ignoring the negative environmental and social impacts of multi-purpose projects in long-form answers.
- Failing to distinguish between physical water scarcity (lack of rainfall) and economic water scarcity (poor infrastructure).
More Revision Notes
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