Chapter 15 of 22
Syllabus
Drainage System — Syllabus
Gujarat Board · Class 9 · Social Science
What Drainage System covers in Gujarat Board Class 9 Social Science: 4 topics, for the 2026-27 session. Topics include Basic Concepts and Definitions.
45 questions20 flashcards5 concepts
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4 Topics · Gujarat Board Class 9 Social Science · 2026-27
Topics in Drainage System
1
Basic Concepts and Definitions
- Drainage system is the systematic pattern of rivers in any region
- River basin is the area drained by a river and its tributaries
- Water divide is a mountain or upland that separates water flow of different rivers
2
River Course Stages
- Rivers have three stages: Upper Course, Middle Course, and Lower Course
- Upper Course: Intense erosion, steep slopes, V-shaped valleys
- Middle Course: Reduced flow, meandering begins, lateral erosion
3
Drainage Patterns
- Four main drainage patterns: Dendritic, Trellis, Rectangular, and Radial
- Dendritic Pattern: Tree-like arrangement (e.g., Ganga system)
- Trellis Pattern: Net-like pattern from mountainous streams (Himalayan streams)
4
Himalayan Rivers
- Three major systems: Indus (Sindhu), Ganga, and Brahmaputra
- Perennial rivers with water throughout the year
- Fed by monsoon rains and melting snow/glaciers
Key Concepts
A drainage system is the systematicThese are perennial rivers originating fromThese are seasonal rivers originating mainlyRivers form different patternsUpper Course
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What are the important topics in Drainage System for Gujarat Board Class 9 Social Science?
Key topics in Drainage System include Basic Concepts and Definitions, River Course Stages, Drainage Patterns, Himalayan Rivers. Study these first, then practise questions on each for Class 9 exams.
How should I revise Drainage System for Class 9 exams?
Learn the core ideas first, then work through the 45 practice questions on Drainage System. Revise definitions regularly and use flashcards for quick recall before the exam.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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