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Drainage

Tripura Board · Class 9 · Social Science

Quick revision notes for Drainage — Tripura Board Class 9 Social Science. Key concepts, formulas, and definitions for last-minute revision.

43 questions24 flashcards5 concepts

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An illustration showing how a drainage basin is formed by a river system and how an elevated area, like a mountain or upland, acts as a water divide separating two drainage basins.
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Key Topics to Revise

1

Basic Concepts of Drainage

  • Drainage describes the river system of an area
  • Small streams flow from different directions to form the main river
  • Rivers ultimately drain into large water bodies (lakes, seas, oceans)
2

Classification of Indian Rivers

  • Indian rivers are divided into two major groups: Himalayan rivers and Peninsular rivers
  • Classification is based on the broad relief features of the subcontinent
  • Himalayan rivers: Perennial (water throughout the year), receive water from rain and melted snow
3

Major Himalayan Rivers

  • Three major Himalayan rivers: Indus, Ganga, and Brahmaputra
  • These are long rivers joined by many large tributaries
  • A river along with its tributaries forms a river system
4

The Indus River System

  • Rises in Tibet near Lake Mansarowar
  • Flows west, enters India in Ladakh, forms picturesque gorge
  • Tributaries in Kashmir: Zaskar, Nubra, Shyok, Hunza

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Full Notes

Key Concepts

An area drained by a singleAn elevated area like a mountainRivers originating from the HimalayasRivers of the peninsular plateauContamination of rivers due to domestic

Frequently Asked Questions

What are the important topics in Drainage for Tripura Board Class 9 Social Science?
Drainage covers several key topics that are frequently asked in Tripura Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Drainage — Tripura Board Class 9 Social Science?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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