Physical Features of India

Overview

Physical Features of India is a foundational topic in the Geography section of Social Studies for MP TET Varg-2. Questions frequently test your knowledge of major landforms, river systems, and climatic zones. Understanding India's physiography helps explain settlement patterns, agriculture, and resource distribution—themes that connect to other social studies topics.

India displays remarkable physical diversity across its 32.8 lakh sq km area. The country stretches from the towering Himalayas in the north to the tropical coastline in the south, and from the Thar Desert in the west to the deltaic plains in the east. For the exam, focus on names, locations, heights of peaks, river origins, and climate types. Map-based mental imagery is essential.

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Key Concepts

• **Six Major Physiographic Divisions**: India is divided into the Himalayan Mountains, Northern Plains, Peninsular Plateau, Coastal Plains, Islands, and the Thar Desert.

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

• **Northern Plains as Alluvial Deposits**: The vast Indo-Gangetic plains are formed by depositional work of three river systems—Indus, Ganga, and Brahmaputra—making them extremely fertile.

• **Peninsular Plateau as Oldest Landmass**: The Deccan Plateau is part of the ancient Gondwana land, composed of igneous and metamorphic rocks, rich in minerals.

• **Rivers of India**: Classified as Himalayan (perennial, snow-fed) and Peninsular (rain-fed, seasonal). Drainage divided into Bay of Bengal and Arabian Sea systems.

• **Monsoon Climate**: India's climate is dominated by the southwest monsoon (June–September) bringing 75% of annual rainfall. Four seasons: winter, summer, advancing monsoon, retreating monsoon.

• **Western and Eastern Ghats**: Western Ghats are higher and continuous; Eastern Ghats are lower and discontinuous, cut by east-flowing rivers.

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Key Facts

| Feature | Important Details | |---------|-------------------| | Highest Peak (India) | Kanchenjunga (8586 m) in Sikkim | | Highest Peak (World) | Mt Everest (8848 m), on Nepal-Tibet border | | Longest River (India) | Ganga (2525 km) | | Largest Peninsular River | Godavari (1465 km), called "Dakshin Ganga" | | Highest Plateau | Ladakh Plateau (average 5000 m) | | Largest Delta | Sundarbans (Ganga-Brahmaputra delta) | | Hottest Place | Sri Ganganagar (Rajasthan) in summer | | Wettest Place | Mawsynram (Meghalaya) – about 1187 cm annual rainfall | | Driest Region | Thar Desert (less than 25 cm rainfall) |

**Three Parallel Ranges of Himalayas** (North to South): 1. **Himadri (Greater Himalayas)** – highest, permanently snow-covered, includes Everest, Kanchenjunga, Nanga Parbat 2. **Himachal (Lesser Himalayas)** – includes Pir Panjal, Dhaula Dhar; hill stations like Shimla, Mussoorie 3. **Shiwaliks (Outer Himalayas)** – lowest, made of unconsolidated sediments; Duns (valleys) like Dehradun

**Major Passes**: Karakoram Pass (highest motorable), Khyber Pass, Banihal Pass, Nathu La, Shipki La

**Divisions of Northern Plains**:

• Bhabar – pebble zone at foothill
• Terai – marshy, forested belt
• Bhangar – older alluvium (contains kankar)
• Khadar – newer alluvium (fertile floodplain)

**Major Rivers and Their Origins**: | River | Origin | |-------|--------| | Ganga | Gangotri Glacier (Uttarakhand) | | Yamuna | Yamunotri Glacier | | Brahmaputra | Angsi Glacier near Mansarovar (Tibet) | | Narmada | Amarkantak (MP) | | Tapi | Multai (MP) | | Godavari | Nasik (Maharashtra) |

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Worked Examples

**Example 1**: Identify the physiographic division. *A region has old, hard crystalline rocks, black soil, and is rich in iron ore and manganese.*

**Solution**:

• Old crystalline rocks → ancient landmass
• Black soil → formed from basalt (volcanic rock)
• Rich in minerals → characteristic of plateau region
• **Answer**: Peninsular Plateau (specifically Deccan Plateau with Deccan Trap)

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**Example 2**: Which rivers flow into the Arabian Sea? *From the given list: Ganga, Narmada, Godavari, Tapi, Krishna, Mahanadi*

**Solution**:

• Arabian Sea drainage: rivers flowing westward
• Narmada and Tapi flow westward through rift valleys
• Ganga, Godavari, Krishna, Mahanadi all flow eastward into Bay of Bengal
• **Answer**: Narmada and Tapi

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**Example 3**: Why does Mawsynram receive highest rainfall in India?

**Solution**:

• Located in Meghalaya on southern slopes of Khasi Hills
• Funnel-shaped relief traps moisture-laden southwest monsoon winds
• Winds rise, cool adiabatically, and cause orographic rainfall
• **Answer**: Funnel-shaped topography causing orographic precipitation

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Common Mistakes

• **Confusing Himadri with Himachal**: Students mix up the Greater and Lesser Himalayas. Remember: Himadri = highest and northernmost; Himachal = middle range with hill stations.

• **Mixing Bhabar and Terai**: Bhabar is the pebble-filled zone where streams disappear; Terai is the marshy belt where streams re-emerge. Sequence from north: Bhabar → Terai → Bhangar → Khadar.

• **Assuming all peninsular rivers flow east**: Narmada and Tapi are exceptions—they flow westward through rift valleys, not formed by back-tilting of plateau.

• **Forgetting Brahmaputra's origin**: Brahmaputra originates in Tibet (not India), flows east as Tsangpo, enters India in Arunachal Pradesh as Dihang.

• **Confusing Western and Eastern Ghats**: Western Ghats are higher (average 1200 m), continuous, and the source of major peninsular rivers. Eastern Ghats are lower, broken by river valleys.

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Quick Reference

• **Himalayas**: Himadri → Himachal → Shiwaliks (N to S); young fold mountains; formed by plate collision

• **Northern Plains**: Bhabar → Terai → Bhangar → Khadar (N to S); most fertile region

• **Peninsular Plateau**: Deccan (south) + Central Highlands (north of Narmada); tilts east

• **West-flowing rivers**: Narmada, Tapi (through rift valleys into Arabian Sea)

• **Monsoon**: SW monsoon (June–Sept) = 75% rain; NE monsoon (Oct–Nov) affects Tamil Nadu

• **Key passes for MP TET**: Karakoram, Khyber, Rohtang, Nathu La, Shipki La