Water resources play a crucial role in sustaining human life, economic activities, and ecological balance. However, India faces challenges related to the uneven distribution, utilization, and management of these vital resources.
Let us learn more about water resources in the article!
Water Resources in India
India possesses approximately 2.45% of the world's land area, 4% of its water resources, and accommodates about 16% of the global population. However, the total usable water resource in the country is significantly lower than the available water from precipitation due to various constraints.
Surface Water Resources
India's surface water sources include rivers, lakes, ponds, and tanks. With over 10,000 rivers and their tributaries, the country's mean annual flow in river basins is substantial. However, only about 32% of available surface water can be utilized due to topographical and hydrological limitations.
Groundwater Resources
The replenishable groundwater resources in India amount to about 432 cubic km. While groundwater utilization is high in certain regions like the north-western and southern river basins, other states utilize their groundwater resources at a moderate rate.
Water Demand and Utilization
Agriculture accounts for the majority of water usage in India, with 89% of surface water and 92% of groundwater allocated for agricultural purposes. The industrial sector's water utilization is limited compared to agriculture, while the domestic sector's share is higher in surface water utilization.
Demand of Water for Irrigation
Given India's reliance on agriculture and the spatio-temporal variability of rainfall, irrigation is crucial for agricultural production. Water demand for irrigation remains a primary concern, particularly in regions with deficient rainfall and drought-prone areas.
Emerging Water Problems
India faces challenges related to dwindling per capita water availability, water pollution from industrial, agricultural, and domestic sources, and deterioration of water quality, particularly in rivers like the Ganga and Yamuna.
Water Conservation and Management
To address these challenges, India must adopt water-saving technologies, prevent pollution, and implement effective conservation and management strategies. Conservation efforts are crucial for sustainable development and to mitigate the adverse impacts of water scarcity and pollution.
Deterioration of Water Quality
Water pollution refers to the contamination of water bodies by various pollutants such as microorganisms, chemicals, industrial waste, and other substances. Pollutants enter lakes, rivers, streams, and oceans, deteriorating water quality and rendering it unsuitable for human use. The Ganga and Yamuna rivers in India are among the most polluted water bodies due to high levels of contamination.
Major Cities along the Ganga and its Tributaries
Cities such as Delhi, Kanpur, Varanasi, and Lucknow are located along the banks of the Ganga and its tributaries. These cities are hubs for various industries, contributing to pollution levels in the rivers.
Water Conservation and Management
With declining freshwater availability and increasing demand, there is a pressing need to conserve and manage water resources effectively. India must develop policies and laws and adopt measures for conservation, including watershed development, rainwater harvesting, and water recycling. Preventing pollution from agricultural, domestic, and industrial sources is also crucial.
Impact of Intensive Irrigation on Agriculture
Intensive irrigation in states like Punjab, Haryana, and western Uttar Pradesh is causing salinity in the soil and depletion of groundwater. This overuse of groundwater resources has led to a decline in the groundwater table and increased concentrations of fluoride and arsenic in certain areas of West Bengal and Bihar. These impacts can adversely affect agricultural productivity, soil quality, and overall environmental health. Efforts are needed to mitigate these effects through sustainable water management practices and public awareness initiatives.
Watershed Management
Watershed management entails the effective conservation and management of both surface and groundwater resources. It includes measures such as preventing runoff, storing water, and recharging groundwater through methods like percolation tanks and recharge wells. In a broader sense, it involves the conservation, regeneration, and judicious use of all natural and human resources within a watershed. The goal is to achieve a balance between natural resources and society, with community participation being essential for success.
Government Initiatives and NGO Participation
Both the Central and State Governments, along with non-governmental organizations (NGOs), have initiated various watershed development and management programs in India. Projects like Haryali, sponsored by the Central Government, aim to involve rural communities in conserving water for multiple purposes such as drinking, irrigation, fisheries, and afforestation. Programs like Neeru-Meeru in Andhra Pradesh and Arvary Pani Sansad in Rajasthan focus on constructing water-harvesting structures through community participation.
Challenges and Successes
While some watershed development projects have been successful in rejuvenating the environment and economy, many are still in their early stages. There is a need to raise awareness about the benefits of watershed development and management among the public. By adopting an integrated water resource management approach, sustainable water availability can be ensured.
Rainwater Harvesting
Rainwater harvesting involves capturing and storing rainwater for various uses, including recharging groundwater aquifers. It is a cost-effective and eco-friendly method that helps increase water availability, improve groundwater quality, prevent soil erosion and flooding, and mitigate saltwater intrusion in coastal areas. Rainwater harvesting has been practiced through various traditional methods and holds great potential for conserving water resources, especially in urban areas where water demand exceeds supply.
Additional Remedies and Considerations
In addition to watershed management and rainwater harvesting, desalination of water in coastal areas and utilizing brackish water in arid regions can be important solutions. Interlinking rivers to transfer water from surplus to deficit areas is another potential remedy. However, addressing the pricing of water is crucial for individual users, households, and communities to ensure equitable access and sustainable management of water resources.
Conclusion
Addressing the issues of water pollution, promoting water conservation measures, and adopting an integrated approach to water resources management are essential for ensuring the sustainable and equitable use of water in India. This requires the concerted efforts of various stakeholders, including the government, industries, and local communities.
