Indian Geography – Jharkhand PSC (General Awareness & Current Affairs)
Goal: Provide a concise, easy‑to‑remember overview of the geography of India that will help you ace the General Awareness & Current Affairs section of the Jharkhand PSC exam.
1. Simple Explanation
India is a South‑Asian country that covers a vast area of 3.29 million square kilometres. It is the 7th largest country in the world and the 2nd most populous after China. India’s geography is highly diverse, ranging from the snow‑capped Himalayas in the north to the tropical coasts in the south, and from the fertile Indo‑Gangetic plains to the arid Thar Desert. The country’s major geographical features include:
| Feature | Location | Key Facts |
|---|---|---|
| Himalayan Range | North | Highest peaks (K2, Nanga Parbat), watershed of major rivers |
| Indo‑Gangetic Plain | North & Central | Most densely populated, fertile alluvial soil |
| Thar Desert | Northwest | Arid, sandy, sparsely populated |
| Deccan Plateau | South | Elevated plateau, rich mineral resources |
| Coastlines | West & East | 7,500 km total; important ports |
| Major Rivers | All directions | Ganga, Yamuna, Brahmaputra, Godavari, Krishna, Narmada, Tapti, Mahanadi, etc. |
2. Key Points (Quick‑Reference List)
| Category | Highlights |
|---|---|
| Area | 3,287,263 km² (India) |
| Population | 1.4 billion (2024) |
| Capital | New Delhi |
| Major States | Uttar Pradesh, Maharashtra, West Bengal, Madhya Pradesh, Bihar, Rajasthan, Gujarat, Karnataka, Tamil Nadu, etc. |
| Top Ten States by Area | Rajasthan, Madhya Pradesh, Maharashtra, Uttar Pradesh, Gujarat, Jharkhand, Chhattisgarh, Karnataka, Andhra Pradesh, Tamil Nadu |
| Top Ten States by Population | Uttar Pradesh, Maharashtra, Bihar, West Bengal, Rajasthan, Madhya Pradesh, Tamil Nadu, Karnataka, Gujarat, Andhra Pradesh |
| Major Cities | Mumbai, Delhi, Bengaluru, Hyderabad, Ahmedabad, Chennai, Kolkata, Surat, Jaipur, Lucknow |
| Highest Peak | Kangchenjunga – 8,586 m (Sikkim) |
| Deepest Lake | Wular Lake – 200 m (Kashmir) |
| Longest River | Ganga – 2,525 km (including tributaries) |
| Largest Lake | Sambhar Lake – 210 km² (Rajasthan) |
| Largest Desert | Thar Desert – 200,000 km² |
| Major Bordered Countries | Pakistan, China, Nepal, Bhutan, Bangladesh, Myanmar |
| Climate Zones | Tropical, Subtropical, Temperate, Alpine, Desert |
| Monsoon Pattern | Southwest monsoon (June‑September), Northeast monsoon (September‑November) |
| Key Natural Resources | Coal, iron ore, copper, mica, bauxite, limestone, natural gas, petroleum |
| Agricultural Output | Rice, wheat, sugarcane, cotton, pulses, tea, coffee, spices |
3. Worked Example
Problem:
If a river has a catchment area of 50,000 km² and an average annual rainfall of 1,200 mm, estimate the total volume of water that the river receives in a year (in cubic metres).
Solution Steps
-
Convert rainfall to metres
(1,200 mm = 1.2 m) -
Calculate volume
[ \text{Volume} = \text{Catchment area} \times \text{Rainfall depth} ] [ = 50{,}000,\text{km}^2 \times 1.2,\text{m} ] -
Convert area to m²
(1,\text{km}^2 = 10^6,\text{m}^2)
So, (50{,}000,\text{km}^2 = 50{,}000 \times 10^6 = 5 \times 10^{10},\text{m}^2) -
Multiply
[ 5 \times 10^{10},\text{m}^2 \times 1.2,\text{m} = 6 \times 10^{10},\text{m}^3 ]
Answer: The river receives 60 billion cubic metres of water annually.
Tip: Remember that 1 mm of rainfall over 1 km² equals 1,000 m³ of water. This quick rule can help you estimate volumes fast during exams.
4. Quick Revision Summary (Bullet Point)
- India’s size: 3.29 million km²; 7th largest country.
- Population: ~1.4 billion (2024).
- Geographical extremes:
- Highest peak: Kangchenjunga (8,586 m).
- Longest river: Ganga (2,525 km).
- Largest desert: Thar (200,000 km²).
- Key physiographic zones: Himalayas, Indo‑Gangetic plain, Thar Desert, Deccan Plateau, coastal plains.
- Climate: Predominantly tropical/subtropical; monsoon-driven rainfall.
- Major rivers: Ganga, Yamuna, Brahmaputra, Godavari, Krishna, Narmada, Tapti, Mahanadi.
- Economic resources: Coal, iron ore, copper, mica, bauxite, natural gas, petroleum.
- Top cities (by population): Mumbai, Delhi, Bengaluru, Hyderabad, Kolkata, Chennai.
- Important states (by area): Rajasthan, Madhya Pradesh, Maharashtra, UP, Gujarat.
- Key current affairs (2024):
- Hydro‑electric projects: Tehri Dam, Sardar