Water Resources — Revision Notes
⚡ 30-Second Revision
- India: 4% global freshwater, 18% global population.
- Per capita availability: ~1545 cubic meters (water stressed).
- Constitutional: Article 262 (inter-state disputes), Entry 17 (State List), Entry 56 (Union List).
- Major Rivers: Indus, Ganga, Brahmaputra (Himalayan, perennial); Godavari, Krishna, Cauvery, Narmada (Peninsular, seasonal).
- Groundwater: Critical, but over-exploited in North India (Punjab-Haryana).
- Key Policies: National Water Policy 2012 (demand management, ecology, pricing).
- Initiatives: Jal Jeevan Mission (rural tap water), Atal Bhujal Yojana (groundwater management).
- Treaties: Indus Water Treaty (1960) - Eastern (India), Western (Pakistan).
- Conservation: Rainwater harvesting, watershed management, micro-irrigation.
- Disputes: Cauvery, Krishna, Mahanadi (tribunals under ISRWD Act, 1956).
2-Minute Revision
India's water resources are characterized by a paradox of abundance and scarcity, driven by uneven spatial and temporal distribution of rainfall, primarily through the monsoon. Surface water from perennial Himalayan rivers (Indus, Ganga, Brahmaputra) and seasonal Peninsular rivers (Godavari, Krishna, Cauvery) forms the backbone.
Groundwater is a critical source, but faces severe depletion, notably in Punjab and Haryana due to intensive agriculture. Constitutionally, water is a State subject (Entry 17), but Parliament has powers over inter-state rivers (Entry 56) and dispute adjudication (Article 262), leading to complex inter-state conflicts resolved by tribunals.
The National Water Policy 2012 emphasizes demand-side management, efficient use, and a participatory approach, while initiatives like Jal Jeevan Mission and Atal Bhujal Yojana aim for universal access and groundwater sustainability.
International agreements like the Indus Water Treaty manage transboundary rivers. Challenges include pollution, climate change impacts, and urban water crises, necessitating a blend of traditional conservation methods (rainwater harvesting, watershed management) and modern technologies (desalination, wastewater recycling) for sustainable water security.
5-Minute Revision
India, home to 18% of the world's population, possesses only 4% of its renewable freshwater, leading to significant water stress with per capita availability declining to around 1,545 cubic meters. This scarcity is exacerbated by the highly seasonal and spatially uneven distribution of monsoon rainfall.
The country's water resources are primarily derived from two major river systems: the perennial, glacier-fed Himalayan rivers (Indus, Ganga, Brahmaputra) and the largely rain-fed, seasonal Peninsular rivers (Godavari, Krishna, Cauvery, Narmada).
Groundwater is a vital resource, fulfilling a large portion of agricultural and domestic needs, but faces severe over-exploitation, particularly in the agricultural heartlands of Punjab and Haryana. The constitutional framework for water governance is complex: Entry 17 of the State List grants states primary control, while Entry 56 of the Union List and Article 262 empower Parliament to regulate inter-state rivers and adjudicate disputes through tribunals (Inter-State River Water Disputes Act, 1956).
This often leads to protracted conflicts like the Cauvery dispute. The National Water Policy 2012, a key policy document, advocates for a shift from supply-side to demand-side management, prioritizing drinking water, promoting efficient use through volumetric pricing, and addressing climate change.
Major government initiatives include the Jal Jeevan Mission for rural tap water and the Atal Bhujal Yojana for sustainable groundwater management. Internationally, the Indus Water Treaty (1960) governs water sharing with Pakistan.
Challenges to India's water security include rampant pollution, the escalating impacts of climate change on monsoon variability, rapid urbanization leading to urban water crises (e.g., Chennai 2019), and the ecological concerns associated with large projects like the River Interlinking Project.
Solutions involve a multi-pronged approach: promoting traditional water conservation methods (rainwater harvesting, watershed management), adopting modern technologies (micro-irrigation, desalination, wastewater recycling), strengthening institutional frameworks, fostering community participation, and ensuring integrated water resource management.
Vyyuha's RIVERS mnemonic helps recall key inter-state disputes: Ravi-Beas, Indus, Vansadhara, Eradi, Ravi-Beas, Satluj. The DROPS mnemonic for water conservation: Drip irrigation, Rainwater harvesting, Oases/Traditional methods, Pollution control, Sustainable use.
A holistic understanding of these interconnected aspects is crucial for UPSC aspirants.
Prelims Revision Notes
Water Resources: India holds 4% of global freshwater, 18% global population. Per capita water availability is ~1545 cubic meters (water stressed). Constitutional provisions: Article 262 empowers Parliament for inter-state water dispute adjudication.
Entry 17 (State List) covers state water management; Entry 56 (Union List) allows Union control over inter-state rivers. River Systems: Himalayan (Indus, Ganga, Brahmaputra) are perennial, glacier-fed, large basins.
Peninsular (Godavari, Krishna, Cauvery, Narmada, Tapti, Mahanadi) are seasonal, rain-fed, smaller basins. Groundwater: Major source for irrigation (40%) and domestic use (80%). Over-exploitation is severe in Punjab, Haryana, and parts of UP due to water-intensive crops (rice, wheat) and free electricity.
National Water Policy 2012: Key features include prioritizing drinking water, demand-side management, volumetric pricing, conjunctive use, climate change adaptation, and participatory approach. River Interlinking Project: Aims to transfer water from surplus to deficit basins (e.
g., Ken-Betwa Link), faces environmental and social concerns. Indus Water Treaty (1960): India gets Ravi, Beas, Sutlej; Pakistan gets Indus, Jhelum, Chenab. India can use Western rivers for non-consumptive purposes with restrictions.
Water Conservation: Traditional methods (Johads, Khadins, Baolis, Eris) and modern (rainwater harvesting, watershed management, micro-irrigation, wastewater recycling, desalination). Legal Frameworks: River Boards Act 1956, Inter-State River Water Disputes Act 1956, Water (Prevention and Control of Pollution) Act 1974.
Current Initiatives: Jal Jeevan Mission (rural tap water), Atal Bhujal Yojana (groundwater management). Key Concepts: Water Footprint, Virtual Water Trade, Aquifer, Watershed Management, Riparian Rights.
Mains Revision Notes
Water Resources in India present a 'paradox of scarcity amidst abundance' due to spatial-temporal distribution mismatches, governance failures, and escalating demand. Geographical factors include monsoon dependency, uneven rainfall distribution, and rapid runoff.
Socio-economic drivers are population growth, urbanization, industrialization, and inefficient agricultural practices (e.g., groundwater over-extraction in Punjab-Haryana). Governance challenges stem from water being a State subject, leading to fragmented management, prolonged inter-state disputes (Cauvery, Krishna) adjudicated by tribunals under Article 262, and implementation gaps in policies like NWP 2012.
The NWP 2012 advocates for integrated water resource management (IWRM), demand-side management, and a participatory approach, but faces hurdles like political will and funding. Solutions require a multi-pronged strategy: enhancing water conservation (rainwater harvesting, watershed management, traditional methods), promoting efficient use (micro-irrigation, volumetric pricing), augmenting supply (desalination for coastal areas, wastewater recycling), strengthening institutional frameworks (National Water Framework Law, permanent tribunals), and fostering community participation.
Climate change impacts (altered monsoon, glacial melt) necessitate adaptive strategies. Case studies like Chennai's water crisis or Israel's water technology offer critical lessons. The water-energy-food nexus is a crucial analytical framework.
Mains answers should integrate these dimensions, critically evaluate policies, and propose holistic, sustainable solutions, demonstrating a comprehensive understanding of the challenges and opportunities in India's water sector.
Vyyuha Quick Recall
Vyyuha's RIVERS Framework for Inter-State Water Disputes: Ravi-Beas (Punjab, Haryana, Rajasthan) Indus (India, Pakistan - Treaty) Vansadhara (Odisha, Andhra Pradesh) Eradi (Ravi-Beas Tribunal, 1986) Ravi-Beas (Re-allocation) Satluj (Part of Indus system)
Vyyuha's DROPS for Water Conservation Methods: Drip Irrigation & Desalination Rainwater Harvesting & Recycling Old/Traditional Methods (Johads, Khadins) Pollution Control & Prevention Sustainable Use & Storage