Drainage System
CBSE · Class 11 · Geography
Complete topic list for Drainage System in CBSE Class 11 Geography. Key concepts, sub-topics, and what to focus on for board exams.
Topics in Drainage System
Basic Concepts and Terminology
- Drainage: Flow of water through well-defined channels
- Drainage System: Network of channels that drain water from an area
- Catchment Area: Specific area from which a river collects water
Drainage Patterns
- Dendritic Pattern: Tree-like branching pattern (e.g., Northern Plains rivers)
- Radial Pattern: Rivers flow in all directions from a central point (e.g., Amarkantak range)
- Trellis Pattern: Primary tributaries parallel, secondary at right angles
Classification of Indian Drainage
- Based on discharge orientation: Arabian Sea (23%) and Bay of Bengal (77%) drainage
- Major river basins: >20,000 sq km catchment (14 basins)
- Medium river basins: 2,000-20,000 sq km catchment (44 basins)
Himalayan Drainage System
- Evolved through long geological history
- Fed by both snowmelt and precipitation - hence perennial
- Main systems: Indus, Ganga, and Brahmaputra
Key Concepts
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What are the important topics in Drainage System for CBSE Class 11 Geography?
Drainage System covers several key topics that are frequently asked in CBSE Class 11 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 System — CBSE Class 11 Geography?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.
Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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