Mentor’s Comment:  In 2025, global water governance takes a historic turn as the United Nations declares it the International Year of Glaciers’ Preservation and launches the Decade of Action on Cryospheric Science (2025–2034). These initiatives, aligned with World Water Day 2025 and World Day for Glaciers (March 21), focus directly on the vital connections between mountain glaciers, freshwater, and ocean ecosystems. They promote the “Source-to-Sea (S2S)” approach, which integrates water governance from glacial sources all the way to ocean outlets, acknowledging their ecological and hydrological continuity.

Today’s editorial will talk about water governance in India and the world. It will help with GS Paper I (Geography), GS Paper II (Policy Making) and GS Paper III (Environment).

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Let’s learn!

Why in the News?

Scientists and decision-makers need to pay attention to the Source to Sea (S2S) approach.

Why is it significant?

• Crucial Source of Freshwater: Glaciers act as natural water reservoirs, supplying freshwater to millions downstream. Their preservation ensures sustained water availability for drinking, agriculture, and ecosystems. Eg: The Himalayan glaciers feed rivers like the Ganga and Brahmaputra, supporting millions of people in India.
• Indicator of Climate Change: Glaciers are sensitive to global warming; their rapid melting signals climate change impacts. Protecting them helps monitor and mitigate broader environmental risks. Eg: Melting Himalayan glaciers contribute to changing river flows, affecting flood and drought patterns in South Asia.
• Supports Sustainable Development: Preserving glaciers helps maintain mountain ecosystems and supports downstream communities dependent on glacier-fed waters for their livelihoods and economic activities. Eg: Alpine glaciers support mountain agriculture and tourism, critical to local economies in regions like Uttarakhand and Himachal Pradesh.

Why is the Source-to-Sea (S2S) approach important for global water governance?

• Integrated Management of Water Systems: S2S treats freshwater and marine systems as a connected continuum, ensuring that actions upstream (rivers, lakes) consider their impact downstream (coastal and marine environments). Eg: Pollution control in river basins like the Ganges directly affects the health of the Bay of Bengal ecosystem.
• Improves Coordination Across Jurisdictions: S2S promotes cooperation among multiple stakeholders and political jurisdictions, bridging fragmented governance to manage shared water resources effectively. Eg: The Manila Declaration encourages countries to work together on ridge-to-reef management to protect water quality from land to ocean.
• Facilitates Sustainable Solutions for Water and Marine Challenges: By addressing the entire water cycle, S2S enables holistic strategies that tackle issues like pollution, water diversion, and habitat loss, benefiting both terrestrial and marine biodiversity. Eg: Initiatives under the SIWI Action Platform connect freshwater and marine experts to develop better water management practices globally.

How does the changing mountain cryosphere impact downstream water resources?

• Altered Water Flow Patterns: Melting glaciers and shrinking snowpacks change the timing and volume of water flow downstream, leading to seasonal water shortages or floods. Eg: Reduced glacial melt in the Himalayas affects the flow of rivers like the Ganges, impacting water availability for millions.
• Reduced Water Storage Capacity: Glaciers act as natural reservoirs, storing water during cold months and releasing it slowly. Their retreat means less buffering capacity during dry periods, causing water stress downstream. Eg: Declining glacier size in the Alps affects water supplies for European river basins in summer.
• Increased Risk of Natural Hazards: Glacier melt can lead to the formation and sudden breach of glacial lakes, causing flash floods and damaging downstream ecosystems and communities. Eg: Glacial Lake Outburst Floods (GLOFs) in the Himalayas pose risks to villages and infrastructure along rivers like the Indus.

What are the key challenges India faces in managing its water resources? 

• Groundwater Depletion: Over-extraction of groundwater for irrigation, industrial use, and domestic consumption has led to alarming depletion rates of aquifers. This poses a significant threat to long-term water availability and agricultural productivity. Eg, states like Punjab, Haryana, and Rajasthan report over 100% utilization of groundwater resources, leading to critical water scarcity.
• Water Pollution: Water pollution from industrial effluents, untreated sewage, and agricultural runoff has made large quantities of freshwater unusable. According to the Central Pollution Control Board, more than 70% of India’s surface water is polluted, with rivers like the Ganga and Yamuna being majorly affected.
• Climate Change and Erratic Weather Patterns: Changing rainfall patterns, prolonged droughts, and frequent floods induced by climate change are altering water availability. The Indian Meteorological Department has noted a decline in monsoon rainfall, which is critical for replenishing rivers, lakes, and groundwater reserves.

Way forward: 

• Adopt Source-to-Sea (S2S) Approach Nationwide: Implement integrated water governance that connects glacial sources to coastal ecosystems, ensuring coordinated action across sectors and regions.
• Strengthen Climate-Resilient Water Infrastructure: Invest in glacier monitoring, early warning systems, and sustainable groundwater management to adapt to climate-induced water variability and safeguard water security.

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