NDA Geography Notes 2026: Indian Geography Complete One Shot Revision

Preparing for NDA 2026 and struggling to revise Geography quickly? These NDA Geography Notes 2026 are designed as a one-shot revision guide to help you cover all important topics in less time. From physiography and rivers to soils, vegetation, and disaster-prone zones, this guide simplifies key concepts into easy-to-remember points. 

Whether you're revising at the last minute or strengthening your basics, these notes ensure you stay exam-ready with high-yield content that matters most for NDA preparation. 

Physiography of India

India is broadly divided into six physiographic divisions:

1. Peninsular India: This region is characterized by an inverted triangle shape. It is elevated and rigid, featuring several scarpments. An NDA question previously focused on these distinctive features.

2. Hot Desert (Great Indian Desert / Marusthali)

3. Himalayas: Formed during the Tertiary Era, the Himalayas stand as the tallest and youngest mountain range in the world.

4. Northern Plains: Also known as the Indo-Gangetic Plains, these fertile lands are formed by the Indus, Ganga, and Brahmaputra rivers.

5. Coastal Plains

6. Island Groups: India's island groups include the Andaman & Nicobar Archipelago in the Bay of Bengal and the Lakshadweep Island Group in the Arabian Sea.

• The Andaman & Nicobar islands were formed by tectonic activity.

• Lakshadweep islands are primarily formed by corals.

Rivers of India

Indian rivers are primarily classified into two main categories:

Flood Prone Areas of India

Significant flood-prone regions in India include:

• The lower Ganga basin, covering parts of Bihar, Jharkhand, and West Bengal.

• Areas along the banks of the Beas and Sutlej rivers in Punjab.

• Regions along the Brahmaputra river in Assam.

• Coastal areas near the mouths of rivers like Godavari, Krishna, and Kaveri, particularly when they are in their old stage with high water levels.

Drought Prone Areas of India

Regions in India prone to drought, characterized by low water availability, include:

• The Western part of India, encompassing the Thar Desert and Rann of Kutch.

• The Vidarbha region (Eastern Maharashtra).

• The Eastern side of the Western Ghats.

Earthquake Zones of India

Historically, India had up to five earthquake zones. However, in 2025, the Government of India, through the Survey of India and its Bureau, introduced a new earthquake map with a total of six earthquake zones. This update is highly relevant for current affairs. The zones are categorized by seismic activity:

• Zone 2

• Zone 3

• Zone 4

• Zone 5

• Zone 6: This zone represents areas with the highest seismic activity and the most frequent earthquakes. Regions falling under Zone 6 include parts of the Himalayan region (which also has Zone 5 areas), Bhuj, and Andaman & Nicobar.

Vegetation of India

India's natural vegetation can be classified into several types:

1. Tropical Deciduous Forests: These are the most prevalent forest type found in India.

2. Tropical Evergreen Forests: Primarily located in coastal regions, North East India, and the Andaman & Nicobar Islands.

3. Tropical Thorny Forests: Found in Western India, including regions of Rajasthan, Punjab, Haryana, and Northern Gujarat.

4. Mountain Type Forests: Located in mountainous regions.

5. Mangrove Forests: Found in marshy areas, particularly near river deltas where rivers discharge into the sea.

Soils of India

According to the ICAR (Indian Council of Agricultural Research), Indian soils are broadly categorized into eight main types. Some key types include:

• Alluvial Soil: This soil type covers the largest area in India. It is primarily found in the Northern Plains, river valleys, and parts of Peninsular India.

• Red Soil: The second most widespread soil type in the country.

• Black Soil: Another significant soil type found across various regions.

• Laterite Soil: Occurs in localized "pockets," typically in regions with high rainfall and high temperature and humidity.

• Sandy Soil: Characteristically found in desert regions.

• Mountain Soil: Typically found in mountainous regions.

Population of India

Based on the 2011 Census, key population statistics for India are:

Nuclear Stations in India

The topic of nuclear energy is highly likely to be questioned due to its importance as a future energy source. Key nuclear power stations in India and their locations include:

• Narora: Uttar Pradesh

• Rawatbhata: Rajasthan

• Kakrapar: Gujarat

• Tarapur: Maharashtra (This is the oldest nuclear power plant in India, established in 1969.)

• Kaiga: Karnataka

• Kudankulam: Tamil Nadu

Madras (Kalpakkam): Tamil Nadu (Tamil Nadu is notable for having two nuclear power plants: Kudankulam and Kalpakkam.)