Drainage Systems in India

  1. What is the term used for the area drained by a single river system?
    Answer: Basin
    Explanation: A drainage basin is an area where all water drains into a single river system​.
  2. What is the elevated land that separates two drainage basins called?
    Answer: Divide
    Explanation: A water divide is a highland area that separates the flow of water into different basins​.
  3. Which river has the largest basin in India?
    Answer: Ganga
    Explanation: The Ganga river has the largest basin in India, covering multiple states​.
  4. Which two broad categories divide the Indian river system?
    Answer: Himalayan, Peninsular
    Explanation: The rivers in India are classified into Himalayan rivers (perennial) and Peninsular rivers (seasonal)​.
  5. Which river forms the world’s largest delta?
    Answer: Ganga-Brahmaputra
    Explanation: The Ganga and Brahmaputra rivers form the Sundarbans, the world’s largest delta​.
  6. Which Himalayan river is also known as Tsang Po in Tibet?
    Answer: Brahmaputra
    Explanation: The Brahmaputra River is called the Tsang Po in Tibet and flows through Arunachal Pradesh and Assam​.
  7. Which is the longest river of Peninsular India?
    Answer: Godavari
    Explanation: The Godavari is the longest Peninsular river, often called the ‘Dakshin Ganga’​.
  8. Which river in the Peninsular region flows westward into the Arabian Sea?
    Answer: Narmada
    Explanation: The Narmada River flows westward in a rift valley, unlike most other Peninsular rivers​.
  9. Which river in India is known as the “Sorrow of Bihar”?
    Answer: Kosi
    Explanation: The Kosi River causes devastating floods in Bihar, earning it the name “Sorrow of Bihar”​.
  10. Which Indian river is regulated under the Indus Water Treaty of 1960?
    Answer: Indus
    Explanation: The Indus River’s water is shared between India and Pakistan as per the Indus Water Treaty​.

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