Explanation: The Indira Gandhi Canal, also known as the Rajasthan Canal, is a major irrigation canal in India that plays a crucial role in providing water to the arid regions of northwestern Rajasthan. The canal is a part of the Indira Gandhi Nahar Project, which was initiated to address the water scarcity issues in the region. The project was named after the former Prime Minister of India, Indira Gandhi, who laid the foundation stone for the canal in 1958.
The Indira Gandhi Canal is the longest canal in India, stretching over 650 kilometers. It originates from the Harike Barrage on the Sutlej River in Punjab and extends into Rajasthan, providing water to the districts of Bikaner, Churu, and Jaisalmer. The canal is a lifeline for the agricultural sector in these regions, as it helps in irrigating vast tracts of land that would otherwise be unsuitable for farming due to the scarcity of water.
The canal system is designed to distribute water through a network of branch canals, distributaries, and minor canals. This extensive network ensures that water reaches even the most remote areas of the region. The Indira Gandhi Canal has significantly improved the agricultural productivity of the region, enabling farmers to grow crops such as wheat, mustard, and vegetables, which were previously not possible due to the arid conditions.
In addition to its agricultural benefits, the canal also provides drinking water to the local population. The water from the canal is treated and supplied to various towns and villages, improving the quality of life for the residents. The canal has also contributed to the development of industries and other economic activities in the region by providing a reliable source of water.
It is important to note that while the Indira Gandhi Canal is a significant water supply system in Rajasthan, there are other canals and water management systems in the state as well. However, the Indira Gandhi Canal stands out due to its scale and the critical role it plays in addressing the water needs of the arid regions of Rajasthan.
In conclusion, the Indira Gandhi Canal is the correct answer as it is the major canal that provides water to the dry areas of Rajasthan, significantly impacting the agricultural and economic development of the region. Understanding the importance of this canal is crucial for comprehending the water management strategies in Rajasthan and the broader context of water resource management in India.