Context

• The UNESCO’s United Nations World Water Development Report of 2022 (UN WWDR 2022) has encapsulated global concern over the sharp rise in freshwater withdrawal from streams, lakes, aquifers and human-made reservoirs, impending water stress and also water scarcity being experienced in different parts of the world.
• The report titled, “Groundwater: Making the Invisible Visible” describes the challenges and opportunities associated with the development, management and governance of groundwater across the world.
• As per report, groundwater accounts for 99 per cent of all liquid freshwater on Earth. However, this natural resource is poorly understood and consequently undervalued and mismanaged and even abused.

Background                  

• In 2007, ‘Coping with water scarcity’ was the theme of World Water Day (observed on March 22).
• The new Water Report of the Food and Agriculture Organization (FAO) of the United Nations sounded a note of caution about this silent crisis of a global dimension, with millions of people being deprived of water to live and to sustain their livelihood.

Decade of action

• World Water Week 2022 took place in Stockholm, Sweden recently (23 August to 1 September) featuring many discussions under the theme: “Seeing the Unseen: The Value of Water”.
• These deliberations are expected to help bring the water agenda to the forefront, ahead of the UN-Water Summit on Groundwater in Paris in December, 2022.
• The agenda will be furthered in the UN Water Conference in New York in March 2023, formally known as the 2023 Conference for the Midterm Comprehensive Review of Implementation of the UN Decade for Action on Water and Sanitation (2018-2028).

Growing water stress

• The Water Scarcity Clock, an interactive web tool, shows that over two billion people live in countries now experiencing high water stress and the numbers will continue to increase.
• The Global Drought Risk and Water Stress map (2019) shows that major parts of India, particularly west, central and parts of peninsular India are highly water stressed and experience water scarcity.
• A NITI Aayog report, ‘Composite Water Management Index’ (2018) has sounded a note of caution about the worst water crisis in the country, with more than 600 million people facing acute water shortages.

Impending dangers of water scarcity

• Prompts competition: Areas with acute water shortage usually resort to transferring of water from the hinterlands/upper catchments or drawing it from stored surface water bodies or aquifers. This triggers sectoral and regional competition.
• Demonstration: Increasing trans-boundary transfer of water between rural and urban areas is one such issue of global concern which has been noted in many countries since the early 20th century.
• Statistics: A 2019 Review paper reported that, globally, urban water infrastructure imports an estimated 500 billion litres of water per day across a combined distance of 27,000km.
• Inter-basin transfers: At least 12% of large cities in the world rely on inter-basin transfers.
  • A UN report on ‘Trans boundary Waters Systems – Status and Trend’ (2016) linked this issue of water transfer with various Sustainable Development Goals (SDGs) proposed to be achieved during 2015 to 2030.
  • The report identified risks associated with water transfer in three categories of biophysical, socio-economic and governance.
  • South Asia, including India, falls in the category of high biophysical and the highest socio-economic risks.

Urban water use framework in India

• Surging urban populace: According to Census 2011, the urban population in India accounted for 34% of total population distributed in 7,935 towns of all classes.
• World Urbanization Prospects, 2018 report: As per report, it is estimated that the urban population component in India will cross the 40% mark by 2030 and the 50% mark by 2050
• Upcoming scenario: Although the pace of India’s urbanization is relatively slow, it is now urbanising at a rapid pace.
  • Water use in the urban sector will increase more as people shift to urban areas, and per capita use of water will continue to grow with improved standards of living.
• Urban water management trajectory: In the initial stages when a city is small, it is concerned only with water supply. The water is also sourced locally, with groundwater meeting the bulk of the supply.
  • As the city grows and water management infrastructures develop, dependence shifts to surface water.
  • With a further growth of cities, water sources shift further up in the hinterlands, or the allocation of urban water is enhanced at the expense of irrigation water.
  • Almost all cities in India that depend on surface water experience this trend. City water supply is now a subject of inter-basin and inter-State transfers of water
• Danger of strife: Whatever be the source, surface or groundwater, cities largely depend on rural areas for raw water supply, which has the potential to ignite the rural-urban dispute.
• Evidence: Available studies covering Nagpur and Chennai indicate the imminent problem of rural-urban water disputes that the country is going to face in the not-so-distant future as water scarcity grows, which will be further exacerbated by climate change.

Ahmedabad case study

• Earlier layout: In Ahmedabad more than 80% of water supply in the city used to be met from groundwater sources till the mid-1980s. The depth to groundwater level reached 67 metres in confined aquifers.
• Today’s picture: The city now depends on the Narmada canal for the bulk of its water supply. The shift is from local groundwater to canal water receiving supply from an inter-State and inter-basin transfer of surface water.
  • Dependence on groundwater continues particularly in the peri-urban areas in almost all large cities that have switched to surface water sources.
• Assessing water levels: While surface water transfer from rural to urban areas is visible and can be computed, the recharge areas of groundwater aquifers are spread over well beyond the city boundary or its periphery and difficult to enumerate.

Turning the tables

• At present, the rural-urban transfer of water is a lose-lose situation in India as water is transported at the expense of rural areas and the agricultural sector.
• In cities, most of this water is in the form of grey water with little recovery or reuse, eventually contributing to water pollution.
• However, rural and urban areas use water from the same stock, i.e., the water resources of the country. Therefore, it is important to strive for a win-win
• Such a situation is possible by addressing governance challenge in the rural and urban areas and fostering an rural-urban partnership and adopting an integrated approach in water management.

Way forward

• A system perspective and catchment scale-based approach are necessary to link reallocation of water with wider discussions on development, infrastructure investment etc. to address the critical water crises facing the world.
• Institutional strengthening can also provide opportunities to build flexibility into water resource allocation at a regional level, enabling adjustments in rapidly urbanising regions.