What is water stress? How and why does it differ regionally in India?

GS 1

Indian Geography

2019

15 Marks

Water stress represents a critical challenge for India's sustainable development, with the NITI Aayog 2024 reporting that 40% of India's population will lack access to drinking water by 2030.

India Water Stress Regional Thematic Map

Understanding Water Stress

Water stress occurs when water demand exceeds available supply or when poor quality restricts usage, measured through:

Per capita water availability below 1,000 cubic meters annually
Groundwater depletion rates exceeding natural recharge
Water quality degradation affecting usability
Withdrawal-to-availability ratio crossing sustainable limits
Seasonal scarcity during non-monsoon periods

Regional Variations Across India

Region	Water Stress Level	Key Characteristics	Examples
Northwestern States	Extreme	Over-exploitation, low rainfall	Punjab, Haryana, Rajasthan
Peninsular India	High-Moderate	Seasonal stress, hard rock aquifers	Karnataka, Telangana, Tamil Nadu
Eastern States	Low-Moderate	Adequate rainfall, better groundwater	West Bengal, Odisha, Assam
Himalayan States	Low	Abundant water resources	Himachal Pradesh, Uttarakhand

Physical Factors Causing Regional Differences

Climatic Variations:

Arid Regions: Rajasthan receives <400mm annual rainfall
High Rainfall Zones: Northeast gets >2,500mm annually
Monsoonal Dependency: 70% of annual rainfall concentrated in 3-4 months
Temperature Impact: Higher evaporation rates in hot regions
Drought Frequency: Rajasthan faces drought every 2-3 years

Geological Factors:

Hard Rock Aquifers: Limited groundwater storage in Deccan Plateau
Alluvial Plains: High groundwater availability in Indo-Gangetic plains
Coastal Aquifers: Saltwater intrusion in Gujarat, Tamil Nadu
Mountainous Terrain: Natural water storage in Himalayas

Human-Induced Regional Variations

Agricultural Practices:

Green Revolution States: Punjab shows 165% groundwater over-exploitation
Water-Intensive Crops: Sugarcane cultivation in Maharashtra's drought-prone areas
Irrigation Methods: Flood irrigation wastage in northern states
Cropping Patterns: Multiple paddy crops depleting groundwater in Punjab

Urban-Industrial Factors:

Mega Cities: Delhi, Chennai face acute shortages during summers
Industrial Clusters: Gujarat's chemical industry straining local resources
Population Density: 600 million Indians face high-to-extreme water stress
Infrastructure Gap: Uneven distribution systems across states

Government initiatives like Jal Jeevan Mission aim to provide tap water connections to all rural households by 2024, while Atal Bhujal Yojana focuses on sustainable groundwater management in critical states.

Answer Length

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