Latest news with #WorldWaterDevelopmentReport2025
The Hindu
06-06-2025
- Science
- The Hindu
Water management in India needs a new course
The theme of World Water Day 2025, a day observed every year on March 22, was 'Glacier Preservation' . The year 2025 has also been declared the International Year of Glaciers' Preservation by the United Nations (March 21 is World Day for Glaciers, observed for the first time this year), which also marks the beginning of a 'Decade of Action on Cryospheric Science' (2025-34). There have been a series of global events on various issues that have included the theme of 'water and glaciers – from science to policy' and the need for regional and local actions. The United Nations World Water Development Report 2025, which was on the theme 'Mountain and Glaciers – Water Towers', has drawn global attention to the importance of mountain waters including alpine glaciers in the sustainable development of mountain regions and downstream societies. This focus is relevant especially in the context of a rapidly changing mountain cryosphere, which will have a profound impact on downstream water resources. The cryosphere concerns the frozen portions of the earth. The year 2025 is also the midway point in the United Nations Decade of Ocean Science for Sustainable Development (2021-2030), which proposes the vision of 'Science we need for the ocean we want'. Rising coastal and marine pollution, coastal hazards, rising sea surface temperature and sea level rise and the loss of marine biodiversity are the subjects of concern that have been highlighted in this ocean decade. A link that is overlooked Water connects both these geographical entities as there is a clear upstream-downstream linkage. Human activities upstream impact the downstream environment. Although the hydrological cycle operates independently as a natural process, at the sub-system level, it is modified due to human activities. These include damming and the diversion of water from rivers for agriculture and other purposes, the drawing of water from surface water bodies and groundwater aquifers, and the pollution of water bodies. All these changes result in the alteration of freshwater flow to coastal areas and the open ocean, thereby affecting the marine environment. Current water management practices often overlook this linkage, which is now emerging as a major global concern. In recognition of the need for integrated land, freshwater and coastal and ocean resource management, the concept of a Source to Sea (S2S) approach was proposed as a part of the Manila Declaration, in January 2012. This declaration focuses on 'Furthering the Implementation of the Global Programme of Action for the Protection of the Marine Environment from Land-based Activities'. Adopted by 65 countries, it proposed 'to improve cooperation and coordination at all levels to deal with issues related to oceans, coasts, islands and their associated watersheds, by applying integrated management such as 'ridge to reef' approaches, including by involving stakeholders and developing innovative solutions to improve or resolve identified problems'. The Stockholm International Water Institute (SIWI) also launched the Action Platform for Source-to-Sea Management initiatives on September 1, 2014. The aim was to help decision-makers, stakeholders, and freshwater, coastal and marine experts to connect, cooperate and promote better practices, and also facilitate and enhance international cooperation. Since January 2025, the International Union for Conservation of Nature hosts this platform. The basic premise of the S2S approach is the understanding that 'Earth is a unique system' and that fresh and marine water systems are part of a single continuum. This approach takes a critical view of current water management and governance arrangements which use different strategies for different segments of the same water body. In 2012, the analysis report of the Land-based Pollution Sources Working Group ( United Nations University) suggested two major adjustments for the approach to project management. The first was to overcome the traditional divide of water or, rather, the isolated consideration of rivers, aquifers, lakes, large marine ecosystems and open oceans. The second was to apply a socio-ecological system scale in design and scientific analysis including transboundary diagnostic analysis and causal chain analysis to arrive at solutions. Both these suggestions deserve the attention of all countries. The working group was executing a project of the Global Environmental Facility (GEF)-International Water (IW) Science to enhance the use of science in international water projects in order to improve project results. Problems with India's water management India faces several challenges in the matter of water management. These include spatial heterogeneity in the availability of water, unequal access, increasing pollution, climate change, and conflicts. A NITI Aayog study (2018) reported that water stress might affect 600 million people with a likely loss of 6% of GDP due to water stress. The Aquaduct Water Risk Atlas of the World Resources Institute observes that India is one of the countries which could face extreme water stress, impacting agricultural production and disrupting the economy. In 2022, the Central Pollution Control Board identified 311 polluted river stretches (of varying severity) along 279 rivers in 30 States and Union Territories. India produces an average of 1.7 lakh tonnes of solid waste a day of which around 53% is treated. A significant amount of untreated waste finds its way into waterbodies. India uses an average of 60.5% of extractable ground water resources, with States such as Haryana, Punjab and Rajasthan reporting more than 100% use. Around 25% of groundwater assessment units are under various categories of risk. Over 60% of irrigated farming and 85% of drinking water are derived from groundwater reserves. Groundwater quality is also declining. Water security faces a growing threat. India's water management problems are a result of a fragmented and sectoral approach. Another reason is because rivers and other waterbodies are often inter-State and multiple political jurisdictions are involved in administering the same waterbody. There are four different governance systems to address natural commons such as rivers and water bodies. Private property owners operate on the local/panchayat/village governance commons; local government operates on the State governance commons; the State government operates on the national governance commons, and the national government operates on the global governance commons. The challenge is to coordinate activities under different tiers, have them as a part of the nested governance systems and devise an appropriate water policy for the country. An approach on the fringes The first national water policy was introduced in 1987. Subsequently, there have been attempts to modify and include other features. In 2015, a committee was constituted to restructure the Central Water Commission and the Central Ground Water Board to form the National Water Commission. In 2019, the Ministry of Jal Shakti set up a committee of independent experts to draft a national water policy. It has suggested policy recommendations to address challenges. States have also prepared water policies. Despite these initiatives, the S2S approach has yet to gain the attention of policy planners. There are two case study initiatives being contemplated following the S2S approach. The first addresses the nutrient management of Delhi waterbodies under the S2S platform and the second is a proposed project under the S2S Future programme to examine relationships between human settlement and the S2S landscape in the Indo-Gangetic basin. It is important to have a shift in favour of the S2S approach adopting a social ecological system framework for coordinated implementation of the freshwater and marine Sustainable Development Goals (6 and 14). The focus must be on linking targets 6.5 (integrated water resource management) and 14.1 (land-based activities) by involving all stakeholders, reducing the gap between science, policy and execution and facilitating innovative interventions. Srikumar Chattopadhyay is a retired scientist with the Centre for Earth Science Studies, Thiruvananthapuram, and is now Consultant, Kerala Development and Innovation Strategic Council, Thiruvananthapuram
The Guardian
20-03-2025
- Science
- The Guardian
Glacier meltdown risks food and water supply of 2bn people, says UN
Retreating glaciers threaten the food and water supply of 2 billion people around the world, the UN has warned, as current 'unprecedented' rates of melting will have unpredictable consequences. Two-thirds of all irrigated agriculture in the world is likely to be affected in some way by receding glaciers and dwindling snowfall in mountain regions, driven by the climate crisis, according to a Unesco report. More than 1 billion people live in mountainous regions and, of those in developing countries, up to half are already experiencing food insecurity. That is likely to worsen, as food production in such regions is dependent on mountain waters, melting snow and glaciers, according to the World Water Development Report 2025. Developed countries are also at risk: in the US, for example, the Colorado River basin has been in drought since 2000, and higher temperatures mean more of the precipitation is falling as rain, which runs off more quickly than mountain snow, exacerbating drought conditions. Audrey Azoulay, the director general of Unesco, said: 'Regardless of where we live, we all depend in some way on mountains and glaciers. But these natural water towers are facing imminent peril. This report demonstrates the urgent need for action.' The rate of change of glaciers is the worst on record, according to separate research from the World Meteorological Organisation, which published its annual State of the Climate report this week. The largest three-year loss of glacier mass on record occurred in the past three years, the study found, with Norway, Sweden, Svalbard and the tropical Andes among the worst-affected areas. Eastern Africa has lost 80% of its glaciers in places and, in the Andes, between a third and a half of glaciers have melted since 1998. Glaciers in the Alps and the Pyrenees, the worst affected in Europe, have shrunk by about 40% over roughly the same period. The decline of glaciers has had a further impact, added Abou Amani, director of water sciences at Unesco, in that the loss of ice replaces a reflective surface with dark soil that absorbs heat. 'Glaciers melting have an impact on the reflectivity of [solar] radiation and that will impact the whole climate system,' he warned. Sign up to Down to Earth The planet's most important stories. Get all the week's environment news - the good, the bad and the essential after newsletter promotion More avalanches will also result, as rain falling on snow is a major factor behind avalanche formation. Pooling water from melting glaciers can also be released, causing sudden floods in valleys or to people living further down the slopes. Permafrost is also melting, releasing methane from the mountain soils that melting glaciers are uncovering. A previous study, published last month in the peer-reviewed journal Nature, found that half of global glacier mass would be lost by the end of the century, if global heating was not halted. Alex Brisbourne, a glacier geophysicist at the British Antarctic Survey, said: 'Mountain glaciers contain some of the largest freshwater reservoirs on Earth. Meltwater released in the summer provides the water supply to a billion people and sustains an enormous amount of industry and agriculture. The impact [of such melting] will be felt way beyond those immediately downstream of the glaciers.' These impacts are coming at a time when many food sources are already under strain. Alvaro Lario, president of the International Fund for Agricultural Development (Ifad) and chair of UN-Water, called for more support for people who live in afflicted mountain regions. 'Water flows downhill, but food insecurity rises uphill. Mountains provide 60% of our freshwater, but the communities that safeguard these vital resources are among the most food insecure,' he said. 'We must invest in their resilience to protect glaciers, rivers, and a shared future for all of us.'
