The correct answer is: A) Krishna
The Nagarjuna Sagar Dam is a gravity dam on the Krishna River in the Nalgonda district of Telangana, India. It is the second-largest dam in India, after the Bhakra Dam. The dam was built between 1955 and 1969 and was inaugurated by Jawaharlal Nehru on 17 November 1969.
The dam is 1,215 meters long and 80 meters high. It has a gross storage capacity of 88.7 tmcft and a live storage capacity of 79.2 tmcft. The dam generates 800 MW of hydroelectric power.
The Nagarjuna Sagar Dam has a number of benefits, including:
- Irrigation: The dam provides irrigation water to over 1.2 million hectares of land in Telangana and Andhra Pradesh.
- Hydroelectric power: The dam generates 800 MW of hydroelectric power.
- Flood control: The dam helps to control floods in the Krishna River basin.
- Navigation: The dam provides a navigation channel for boats and ships between the Krishna River and the Godavari River.
- Tourism: The dam is a popular tourist destination.
The Nagarjuna Sagar Dam has also had a number of negative impacts, including:
- Submergence of villages: The dam submerged over 100 villages and displaced over 100,000 people.
- Environmental impact: The dam has had a negative impact on the environment, including the loss of biodiversity and the siltation of the Krishna River.
- Social impact: The dam has had a negative impact on the social fabric of the region, including the displacement of people and the loss of livelihoods.
Despite the negative impacts, the Nagarjuna Sagar Dam is a vital infrastructure project that has brought a number of benefits to the region.