Physical Features of India

Overview

Physical Features of India is a foundational topic in the Geography section of CG TET Paper II Social Studies. It covers the major landforms—mountains, plains, plateaus—along with the river systems and climatic patterns that shape the Indian subcontinent. This topic carries significant weight because questions often test factual recall of locations, heights, river origins and climate types.

For CG TET, expect 3–5 questions directly from this area. You must know the six major physiographic divisions, key mountain passes, river systems (especially those relevant to Chhattisgarh like Mahanadi), and the monsoon mechanism. Map-based mental imagery helps—visualise India divided into distinct relief regions from north to south.

Mastery here also supports the Chhattisgarh-specific geography questions, since the state's plateau region connects to the broader Deccan system. Build a clear mental map and memorise the "anchor facts" listed below.

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Key Concepts

• **Six Physiographic Divisions**: India is divided into (1) The Himalayan Mountains, (2) The Northern Plains, (3) The Peninsular Plateau, (4) The Indian Desert, (5) The Coastal Plains, and (6) The Islands.

• **Himalayan Formation**: The Himalayas are young fold mountains formed by the collision of the Indian Plate with the Eurasian Plate during the Tertiary period (about 50 million years ago). They are still rising.

• **Three Parallel Ranges of Himalayas**: From north to south—Himadri (Greater Himalayas, highest), Himachal (Lesser Himalayas, includes hill stations), and Shiwaliks (Outer Himalayas, youngest and lowest).

• **Northern Plains Origin**: Formed by alluvial deposits of the Indus, Ganga and Brahmaputra river systems. These are among the most fertile lands in the world.

• **Peninsular Plateau Character**: One of the oldest landmasses, composed of igneous and metamorphic rocks. Divided into Central Highlands (north of Narmada) and Deccan Plateau (south of Narmada).

• **Drainage Divide**: The Western Ghats act as the main water divide—rivers to the west (short, swift) drain into the Arabian Sea; rivers to the east (longer) drain into the Bay of Bengal.

• **Monsoon Mechanism**: India's climate is dominated by the seasonal reversal of winds. The southwest monsoon (June–September) brings most of India's rainfall.

• **Climate Zones**: India has tropical monsoon climate predominantly, with variations—tropical wet (Kerala), semi-arid (Rajasthan), alpine (Himalayas), and humid subtropical (Northern Plains).

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Formulas / Key Facts

| Feature | Key Fact | |---------|----------| | Highest Peak (India) | Kanchenjunga – 8,586 m (K2 is in PoK) | | Highest Peak (World) | Mt. Everest – 8,849 m (Nepal-Tibet border) | | Longest River (India) | Ganga – 2,525 km | | Largest River Basin | Ganga Basin | | Highest Plateau | Ladakh Plateau (average 5,000 m) | | Largest Plateau | Deccan Plateau | | Western Ghats | Average height 900–1,600 m; called Sahyadris | | Eastern Ghats | Discontinuous; average 600 m | | Largest Lake | Chilika Lake (Odisha) – brackish water | | Highest Lake | Pangong Tso (Ladakh) | | Major Passes | Khyber, Bolan (NW); Shipki La, Nathu La (NE); Rohtang (HP) | | Southwest Monsoon months | June to September | | Northeast Monsoon | October to December (Tamil Nadu coast) | | Retreating Monsoon | October–November | | Average Annual Rainfall (India) | About 118 cm | | Highest Rainfall | Mawsynram, Meghalaya (~1,187 cm) |

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Worked Examples

**Example 1: Identifying River Systems**

*Question*: The river Mahanadi originates from which state and drains into which water body?

*Solution*:

• Origin: Sihawa near Dhamtari in **Chhattisgarh**
• Flows through: Chhattisgarh and Odisha
• Drains into: **Bay of Bengal** (forms a delta near Cuttack)
• Key dam: Hirakud Dam (Odisha) – one of the longest earthen dams

**Example 2: Physiographic Division Identification**

*Question*: Aravalli Range belongs to which physiographic division?

*Solution*:

• Aravalli is part of the **Peninsular Plateau** (specifically Central Highlands)
• It is one of the oldest fold mountains in the world (highly eroded)
• Runs from Gujarat to Delhi (southwest to northeast)
• Highest peak: Guru Shikhar (1,722 m) in Mt. Abu, Rajasthan

**Example 3: Climate Type**

*Question*: Why does Chennai receive rainfall in winter while Mumbai receives rainfall in summer?

*Solution*:

• Mumbai: Located on western coast; receives rain from **southwest monsoon** (June–September)
• Chennai: Located on eastern coast; receives rain from **northeast monsoon** (October–December) as winds pick up moisture from Bay of Bengal
• This explains why Tamil Nadu has a different rainfall pattern from the rest of India

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Common Mistakes

• **Confusing K2 with India's highest peak** → K2 (8,611 m) is in Pakistan-occupied Kashmir; India's highest peak entirely within its territory is **Kanchenjunga**.

• **Mixing up Western and Eastern Ghats** → Western Ghats are continuous and higher (cause orographic rainfall); Eastern Ghats are discontinuous and lower. Remember: "West is Best" (higher, continuous).

• **Forgetting the direction of Peninsular rivers** → Most peninsular rivers flow **west to east** (Godavari, Krishna, Kaveri, Mahanadi) because the Western Ghats are the water divide. Only Narmada and Tapi flow westward (they flow through rift valleys).

• **Assuming monsoon means only rain** → Monsoon refers to **seasonal wind reversal**, not just rainfall. Southwest monsoon brings rain; northeast monsoon is mostly dry except for Tamil Nadu coast.

• **Placing Shiwaliks as the highest range** → Shiwaliks are the **lowest and youngest** Himalayan range. Himadri (Greater Himalayas) is the highest. Remember: "Himadri = Him (snow) + Adri (mountain)" = snow-capped = highest.

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Quick Reference

1. **Six divisions**: Himalayas → Northern Plains → Peninsular Plateau → Thar Desert → Coastal Plains → Islands

2. **Three Himalayan ranges (N to S)**: Himadri – Himachal – Shiwaliks

3. **Peninsular Plateau split**: Central Highlands (north of Narmada) + Deccan Plateau (south of Narmada)

4. **West-flowing peninsular rivers**: Only Narmada and Tapi (rift valley origin)

5. **Monsoon months**: SW monsoon (June–Sept) = 80% of India's rain; NE monsoon (Oct–Dec) = Tamil Nadu

6. **Chhattisgarh connection**: Mahanadi originates in CG; state lies on the Deccan Plateau extension