Water Resources

Water Resources Overview

Water is a crucial resource, covering about 71% of the Earth's surface, yet only 3% of this is fresh water, with an even smaller percentage available for human use. As demand increases and supplies decline due to over-utilization and pollution, conservation becomes imperative.

India's Water Resources

India accounts for approximately 2.45% of the world’s surface area and 4% of its water resources while supporting more than 17% of the world’s population. The following statistics outline India's water availability:

• Annual water from precipitation: 4,000 cubic km.
• Surface water and replenishable groundwater available: 1,869 cubic km.
• Usable water resource: 1,122 cubic km (60% effective use).
• Freshwater availability varies significantly across regions and seasons.

Surface Water Sources

India has about 10,360 rivers, along with lakes and ponds serving as major sources for surface water. The four principal sources of surface water are:

1. Rivers: Major rivers include the Ganga, Brahmaputra, and Indus, which cover extensive catchment areas.
2. Lakes and Ponds: States like Kerala and Odisha possess significant lakes and lagoons.
3. Tanks: Traditional water conservation structures.

Despite the large volume of rivers, only 32% of surface water is utilizable due to geographical and hydrological constraints. For instance, large river basins like those of the Ganga and Brahmaputra contain substantial water resources yet still face challenges in harnessing them efficiently.

Water Demand and Utilization

India's water demand is primarily driven by agriculture, which requires about 89% of surface water and 92% of groundwater. The agricultural sector is prioritized in various government plans for irrigation enhancements. Key projects include:

• Bhakra-Nangal Project
• Hirakud
• Nagarjuna Sagar

Groundwater is tapped mainly in states such as Punjab, Haryana, and Rajasthan, where it plays a vital role in agriculture, but over-extraction leads to depletion.

Groundwater Resources

Total replenishable groundwater resources in India are about 432 cubic km, with northwestern and southern regions facing higher utilization. Groundwater conservation is crucial due to rising demand and inability of certain states like Chhattisgarh and Odisha to effectively use available resources.

Emerging Water Problems

Water issues include:

• Declining per capita availability due to population growth.
• Pollution from industrial, agricultural, and domestic sources, rendering many water bodies unfit for consumption.
• Legislative measures like the Water (Prevention and Control of Pollution) Act have seen marginal effects.

Water Conservation and Management

Effective water conservation strategies are essential given the growing demand. Recommendations include:

1. Watershed Management: Involves sustainable resource management, emphasizing community participation.
2. Rainwater Harvesting: Techniques to capture and store rainwater help recharge natural aquifers.
3. Recycling Wastewater: Encouraging industries and households to reuse water.
4. Jal Kranti Abhiyan: Initiatives for promoting water conservation and awareness.

National Water Policy

The National Water Policy (2012) aims to:

• Create a legal framework for water management.
• Prioritize ecosystem needs post-basic human needs.
• Promote community participation in water resource management.

Case Study: Ralegan Siddhi

Ralegan Siddhi in Maharashtra is a model for watershed development, showcasing success in water conservation through community effort and self-reliance. The village transformed from a poverty-stricken area into a model through initiatives like water harvesting, prohibition of alcohol, and cultivation of less-water-intensive crops.

Challenges Ahead

As water scarcity escalates, continuous efforts in conservation, pollution control, and sustainable management become critical. Meeting the challenge requires coordinated action across sectors and communities to ensure that water remains available and clean for future generations.

1. Water Scarcity: India faces significant challenges in water availability, exacerbated by population growth and pollution.
2. Water Statistics: India accounts for 2.45% of the world's surface area and 4% of water resources.
3. Surface Water: Major sources include rivers, lakes, ponds, and tanks, with only a fraction of available water being utilized.
4. Agricultural Demand: Agriculture dominates water usage, accounting for approximately 89% of surface water and 92% groundwater.
5. Groundwater Depletion: Over-utilization in regions like Punjab and Haryana is leading to severe groundwater depletion.
6. Pollution: Water quality is deteriorating due to pollutants from industries and agriculture.
7. Conservation Strategies: Effective strategies include watershed management, rainwater harvesting, and community participation initiatives.
8. National Water Policy (2012): Emphasizes legal frameworks, community management, and conservation priorities.
9. Case Studies: Ralegan Siddhi serves as an example of successful community-led water management initiatives.
10. Future Directions: Focus on sustainability, innovation in resource management, and public awareness to mitigate water scarcity risks.