Explanation: The Tehri Dam is a significant hydroelectric project located in the Tehri district of Uttarakhand, India. It is a multi-purpose rock and earth-fill embankment dam constructed on the Bhagirathi River, one of the main tributaries of the Ganges. The dam is the second highest in India and is a crucial part of the Tehri Hydro Development Corporation's efforts to harness the hydroelectric potential of the region.
The Tehri Dam project was initiated in the 1970s and was completed in phases. The primary purpose of the dam is to generate hydroelectric power, but it also serves to provide water for irrigation and to control floods. The construction of the dam has had significant environmental and social impacts, including the submergence of large areas of land, displacement of local communities, and changes to the local ecosystem.
The submergence caused by the Tehri Dam is a direct result of the dam's construction and the creation of the reservoir. The reservoir, known as the Tehri Lake, has a capacity of about 2.6 billion cubic meters and has submerged parts of the Tehri town and surrounding areas. This submergence has led to the relocation of thousands of people and has affected the local biodiversity, including the displacement of wildlife and changes to the river's natural flow.
Understanding the location and impact of the Tehri Dam is crucial for students studying Indian geography, environmental studies, and hydroelectric projects. The Tehri Dam is a prime example of the complex interplay between human development and environmental conservation, and it serves as a case study for the challenges and benefits of large-scale hydroelectric projects.
In conclusion, the Tehri Dam is located in Uttarakhand, and the submergence caused by the dam is a significant aspect of its environmental impact. This makes option B, Uttarakhand, the correct answer to the question.