Indian Geography, Environment, and Natural Resources
What this domain tests
This domain checks India’s physical setting and human-environment links: physiographic divisions, climate and monsoon, drainage, soils, vegetation, biodiversity, natural resources, and environmental governance. Questions often ask candidates to explain a pattern rather than recall a place name.
Core rules
- India’s physiography runs from the Himalayas to the Indo-Gangetic Plain, the Peninsular Plateau, the coastal plains, and the islands. Relief controls drainage, soil, and settlement.
- Himalayan rivers are perennial because they receive snowmelt and monsoon rain; most peninsular rivers are rain-fed and seasonal.
- The southwest monsoon from June to September supplies most of India’s rain. The northeast monsoon from October to December is decisive for Tamil Nadu.
- Major soil groups are alluvial, black or regur, red, laterite, arid, and forest. Black soil retains moisture and is associated with cotton.
- Environmental topics include biodiversity hotspots, pollution, forest conservation, and renewable energy. The Western Ghats and Himalaya are globally recognised hotspots.
Worked example
Question: Why does Mumbai receive far more monsoon rain than Pune, although both lie in Maharashtra? Reasoning: The Arabian Sea branch of the southwest monsoon hits the Western Ghats. Mumbai lies on the windward side, where moist air is forced to rise, cool, and condense. Pune lies in the leeward rain shadow, so descending air is drier and rainfall is much lower. The key is orographic lifting plus rain-shadow position.
Traps
Do not describe the Western Ghats as lying in a rain shadow; they create one. Do not confuse black soil with alluvial soil. Check the direction of a river before labelling its basin: the Narmada and Tapti flow west, while the Godavari and Krishna flow east.