State-owned hydro power giant NHPC recently inked an initial pact with RITES to construct railway siding for a 2,880 MW Dibang multipurpose project in Arunachal Pradesh.
About Dibang Multipurpose Project
- It is a flood control cum hydroelectric power project planned to be developed on the Dibang River, a tributary of the Brahmaputra River, in Arunachal Pradesh.
- At 2,880MW installed capacity, it will be the country’s biggest hydropower facility.
- It is being developed by India’s state-run National Hydroelectric Power Corporation (NHPC).
- Dibang hydroelectric plant makeup:
- The project envisages the construction of a 278m-high and 375m-long concrete gravity dam, which will be the highest dam structure in the country.
- The dam will create a 43 km-long reservoir with a gross storage capacity of 3.85 billion cubic metres.
- It includes 6 Nos. Horseshoe-shaped head race tunnels of length varying from 300m to 600 m with 9 m diameter, an underground Power House, and 6 Nos. horseshoe-shaped tail race tunnels of length varying from 320m to 470 m with 9m diameter.
Key Facts about Dibang River
- It flows through Arunachal Pradesh and Assam states of India.
- It is an upstream tributary of Brahmaputra.
- Origin: The Dibang originates near Keya pass on the Indo-Chinese border in the Upper Dibang Valley district of Arunachal Pradesh.
- Tributaries: The Sisar, Mathun, Tangon, Dri, Ithun and Emra are the major tributaries of the Dibang.
- The Mishmi Hills is found along the upper courses of the Dibang River.
Q1) What is a gravity dam?
A gravity dam is a type of dam that relies on its weight and the force of gravity to resist the pressure of water and other external forces. It is a massive, solid structure typically made of concrete or masonry that spans across a river, valley, or other watercourse.