Q. Consider the following rivers:

  1. Barak
  2. Lohit
  3. Subansiri

Which of the above flows/flow through Arunachal Pradesh?

  • 1 only
  • 2 and 3 only
  • 1 and 3 only
  • 1, 2 and 3

Answer: (b) 2 and 3 only

Barak River
  • Barak rises in the Manipur hills and enters the plains near Lakhipur, Assam
  • The river enters Bangladesh as Surma and Kushiyara.
  • Later, the river is called the Meghna and receives the combined flow of the Ganga and Brahmaputra.
  • The principal tributaries of Barak are the Jiri, the Dhaleswari, the Singla, the Longai, the Sonai and the Katakhal.
  • The Barak sub-basin drains areas in India, Bangladesh and Burma.
  • The drainage area lying in India is 41723 sq.km which is nearly 1.38% of the total geographical area of the country.
  • It is be on the north by the Barail range separating it from the Brahmaputra sub-basin, on the east by the Na Lushai hills and on the south and west by Bangladesh.
  • Barak River flows through the states of Manipur, Nagaland, Mizoram, and Assam in India and into the Bay of Bengal
    • The sub-basin lies in the States of Meghalaya, Manipur, Mizoram, Assam, Tripura and Nagaland.
  • The hydropower potential of the basin is 2042 MW at 60% load factor.
Barak River
Lohit River
  • Lohit river is a river in Arunachal Pradesh and is a tributary of River Brahmaputra.
  • It originates in eastern Tibet, in the Zayal Chu range, and surges through Arunachal Pradesh.
  • The river flows through the Mishmi hills to meet the Siang at the head of Brahmaputra valley
  • The valley of Lohit is thickly forested, covered with alpine and sub-tropical vegetation
  • A large variety of medicinal plants are also found here.
Subansiri River
  • Subansiri River is also called as Gold River as it is famous for its gold dust.
  • Subansari, a swift river offers excellent kayaking opportunities.
  • The Subansiri River flows through the Indian states of Assam and Arunachal Pradesh, and the Tibet Autonomous Region of China.
    • It is the largest tributary of the River Brahmaputra.
  • The Lower Subansiri Dam or The Lower Subansiri Hydro-Electric Project is an under construction dam gravity dam on the river.
River Brahmaputra
  • It is known by the name of the Yarlung Tsangpo in the Tibet region.
  • It originates in Chemayungdung glacier in the Himalayas and drains into the Bay of Bengal.
  • It is about 2,900 km in length.
  • After flowing through Tibet it enters India through Arunachal Pradesh and flows through Assam and Bangladesh before it joins the Bay of Bengal.
  • The river crosses Assam and enters Bangladesh where the river is known as Jamuna and joins Ganga and then finally drains into the Bay of Bengal.
  • Dibang River, Lohit River, Dhansiri River, Kameng River, Manas River, Teesta River, Subansiri River are the major tributaries of River Brahmaputra.
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