Geography of India and Karnataka

1. India: Physical Geography, Climate and Soils

India is a large and varied country with high mountains, wide plains, an old plateau, long coasts and two island groups. Exams ask about location, states, mountain ranges, rivers, the monsoon and soil types.

Location, size and states

• India lies fully in the Northern Hemisphere, roughly between 8°4'N and 37°6'N latitude and 68°7'E and 97°25'E longitude.
• Area is about 32.87 lakh sq km. India is the 7th largest country in the world by area.
• India has 28 states and 8 Union Territories. Rajasthan is the largest state by area and Goa the smallest; Ladakh is the largest UT and Lakshadweep the smallest.
• The Tropic of Cancer (23.5°N) passes through 8 states, from Gujarat in the west to Mizoram in the east. It does not pass through Karnataka.
• Indian Standard Time (IST) is based on the 82°30'E meridian. IST is 5 hours 30 minutes ahead of GMT/UTC.
• In 2025 the Government revised India's coastline length from 7,516.6 km to 11,098.81 km using a new measuring method.

Physical divisions

• The Himalayas have three parallel ranges: Himadri (Greater Himalaya), Himachal (Lesser Himalaya) and Shiwaliks (Outer Himalaya).
• Kangchenjunga (8,586 m, Sikkim) is the highest peak in India-administered territory (India also claims K2, 8,611 m, in Pakistan-occupied Kashmir). Mount Everest is in Nepal.
• The Northern Plains are made of alluvium brought by the Indus, Ganga and Brahmaputra. Old alluvium is called bhangar; new alluvium is khadar.
• The Peninsular Plateau is the oldest landmass of India. The Western Ghats are high and continuous; the Eastern Ghats are low and broken.
• Anamudi (2,695 m, Kerala) is the highest peak of South India. The Thar Desert lies mainly in Rajasthan.
• Island groups: Andaman and Nicobar (Bay of Bengal) and Lakshadweep (Arabian Sea, coral islands). Barren Island in the Andamans is India's only active volcano.

Rivers, monsoon and soils

• Himalayan rivers (Ganga, Indus, Brahmaputra) are perennial. The Ganga is the longest river in India; the Godavari is the longest peninsular river.
• East-flowing peninsular rivers (Mahanadi, Godavari, Krishna, Kaveri) form deltas. West-flowing Narmada and Tapi flow through rift valleys and form estuaries.
• The south-west monsoon (June to September) gives most of India's rain. It usually reaches Kerala around 1 June.
• The retreating or north-east monsoon (October to December) gives rain to Tamil Nadu. Mawsynram in Meghalaya is among the wettest places on Earth.
• Alluvial soil covers the largest area. Black soil (regur), formed from Deccan lava rocks, holds moisture and suits cotton.
• Red soil gets its colour from iron oxide. Laterite soil forms where heavy rain washes away (leaches) nutrients; it suits cashew and tea.

💡 Remember the pattern: east-flowing peninsular rivers make deltas, west-flowing Narmada and Tapi make estuaries. This one rule answers many MCQs.

📝 5-question quiz on this lesson: enrol free to take it and track your score.

2. Karnataka: Physical Geography

Karnataka lies in the south-west of the Indian peninsula. It has a coast, the Western Ghats and a wide plateau. Questions on regions, peaks, rivers and waterfalls of Karnataka appear in almost every KEA paper.

Position, size and neighbours

• Karnataka's area is 1,91,791 sq km. It is the 6th largest state of India by area.
• It lies roughly between 11.5°N and 18.5°N latitude and 74°E and 78.5°E longitude.
• It borders six states: Goa and Maharashtra (north-west and north), Telangana and Andhra Pradesh (east), Tamil Nadu (south-east) and Kerala (south-west).
• The Arabian Sea lies to the west. Karnataka's coastline is about 320 km long (older official figure), covering Uttara Kannada, Udupi and Dakshina Kannada.
• The capital is Bengaluru. The state was named Karnataka on 1 November 1973 (earlier Mysore State).

Natural regions and Western Ghats

• Karavali (ಕರಾವಳಿ): the narrow coastal plain between the sea and the Ghats.
• Malnad (ಮಲೆನಾಡು): the hilly, forested Western Ghats region with very heavy rain (Shivamogga, Chikkamagaluru, Kodagu, Hassan, Uttara Kannada).
• Bayaluseeme (ಬಯಲುಸೀಮೆ): the open plateau (maidan) east of the Ghats, divided into North and South Maidan.
• Mullayanagiri (ಮುಳ್ಳಯ್ಯನಗಿರಿ, about 1,930 m) in the Baba Budangiri range, Chikkamagaluru, is the highest peak of Karnataka.
• Other peaks: Kudremukh (Chikkamagaluru), Tadiandamol (highest in Kodagu), Kodachadri (Shivamogga). Nandi Hills is near Bengaluru.
• Agumbe in Shivamogga district receives very heavy rain and is called the 'Cherrapunji of the South'.

Rivers and waterfalls

• Kaveri (ಕಾವೇರಿ) rises at Talakaveri in the Brahmagiri hills, Kodagu, and flows east to Tamil Nadu. Tributaries: Harangi, Hemavathi, Kabini, Shimsha, Arkavathi.
• Krishna enters Karnataka from Maharashtra. Its tributaries include Ghataprabha, Malaprabha, Bhima and Tungabhadra.
• Tungabhadra (ತುಂಗಭದ್ರಾ) is formed by the Tunga and Bhadra joining at Koodli near Shivamogga.
• West-flowing rivers: Sharavathi, Kali, Aghanashini, Netravati (flows past Mangaluru) and Mahadayi (Mandovi in Goa).
• Jog Falls (ಜೋಗ ಜಲಪಾತ) on the Sharavathi falls about 253 m in four streams: Raja, Rani, Roarer and Rocket.
• Shivanasamudra (Gaganachukki and Bharachukki) is on the Kaveri; a hydroelectric station began here in 1902. Gokak Falls is on the Ghataprabha.

Climate and soils

• Karnataka has a tropical monsoon climate. Most rain comes from the south-west monsoon, June to September.
• The coast and Malnad get very heavy rain; north Karnataka (Raichur, Kalaburagi, Vijayapura) is dry and hot.
• Red soil covers the largest part of the state, mainly in the south and east.
• Black soil is common in north Karnataka (Belagavi, Vijayapura, Dharwad); laterite soil is found in the Malnad and coastal belt.

💡 Draw a rough map of Karnataka and mark Karavali, Malnad and Bayaluseeme with the main rivers. One map helps you remember all the facts in this lesson.

📝 5-question quiz on this lesson: enrol free to take it and track your score.

3. Karnataka: Districts, Divisions, Dams and Irrigation

Karnataka is divided into districts grouped under four revenue divisions. Its dams and irrigation projects support farming, drinking water and power. Water sharing with neighbouring states is a frequent current affairs topic.

Districts and divisions

• Karnataka has 31 districts. The newest is Vijayanagara (headquarters Hosapete), carved out of Ballari in 2020-21.
• In 2025 Ramanagara district was renamed Bengaluru South (headquarters still Ramanagara). In July 2025 the state cabinet also approved renaming Bengaluru Rural as Bengaluru North.
• Four revenue divisions: Bengaluru, Mysuru, Belagavi and Kalaburagi.
• Belagavi is the largest district by area; Bengaluru Urban is the smallest.
• Kalyana Karnataka (old name Hyderabad-Karnataka) has 7 districts: Bidar, Kalaburagi, Yadgir, Raichur, Koppal, Ballari and Vijayanagara. Article 371J gives it special status.
• The Bombay-Karnataka region is now called Kittur Karnataka.

Major dams and reservoirs

• Krishnaraja Sagara (KRS) on the Kaveri, Mandya district: built under Krishnaraja Wadiyar IV with Sir M. Visvesvaraya as chief engineer. Brindavan Gardens lie below it.
• Almatti Dam (Lal Bahadur Shastri Sagar) on the Krishna, Vijayapura-Bagalkot area, is part of the Upper Krishna Project with Narayanpur Dam (Basava Sagar).
• Tungabhadra Dam near Hosapete is managed by the Tungabhadra Board and shared with Andhra Pradesh and Telangana.
• Linganamakki Dam on the Sharavathi (Shivamogga) feeds the Sharavathi hydroelectric project.
• Kabini Dam (Mysuru district), Harangi (Kodagu), Hemavathi (Gorur, Hassan), Bhadra (Lakkavalli, Chikkamagaluru) and Supa on the Kali (Uttara Kannada).
• Malaprabha (Navilutheertha) and Ghataprabha (Hidkal) dams serve north Karnataka.

Irrigation projects and interstate rivers

• Upper Krishna Project and Upper Bhadra Project irrigate dry central and north Karnataka. Yettinahole project aims to supply drinking water to Kolar, Chikkaballapura and nearby districts.
• Cauvery: the tribunal gave its final award in 2007. On 16 February 2018 the Supreme Court fixed Karnataka's share at 284.75 tmcft, Tamil Nadu 404.25, Kerala 30 and Puducherry 7.
• After the 2018 judgment the Cauvery Water Management Authority (CWMA) and Cauvery Water Regulation Committee were set up.
• Mahadayi (Mandovi) rises in Belagavi district and flows into Goa. The Mahadayi tribunal award (2018) gave Goa 24 tmcft, Karnataka 13.42 tmcft and Maharashtra 1.33 tmcft.
• Karnataka's Kalasa-Banduri plan to divert Mahadayi water for drinking and the proposed Mekedatu reservoir on the Kaveri are opposed by neighbouring states; the matters are before authorities and courts.

💡 Learn dams as pairs: dam - river - district. Examiners often swap rivers, for example asking whether Almatti is on the Krishna or the Tungabhadra.

📝 5-question quiz on this lesson: enrol free to take it and track your score.

4. Karnataka: Agriculture, Minerals, Forests and Wildlife

Karnataka leads India in several crops and in silk, has the country's main working gold mine, and is rich in forests and wildlife. This lesson covers the facts that are most often asked.

Agriculture and sericulture

• Karnataka is the largest coffee producer of India, giving about 70 per cent of national output. Chikkamagaluru, Kodagu and Hassan are the main districts.
• Coffee was first grown in India at Baba Budangiri hills, Chikkamagaluru, according to tradition.
• Karnataka is the largest producer of mulberry silk in India. Ramanagara has a very large silk cocoon market.
• Karnataka is the leading producer of ragi (finger millet) and arecanut in India.
• Other important crops: paddy, maize, jowar, tur (Kalaburagi), sugarcane (Belagavi, Mandya), sunflower, cotton and pepper. Byadagi chilli (Haveri) has a GI tag.
• Karnataka's state tree is sandalwood; Mysore sandal soap and oil are famous products.

Minerals

• Gold: Hutti Gold Mines in Raichur district is India's main working gold mine. Kolar Gold Fields (KGF) was closed in 2001.
• Iron ore: Ballari-Hosapete-Sandur belt and Chitradurga. Mining at Kudremukh was stopped in 2005-06 after a Supreme Court order.
• Manganese: Sandur, Shivamogga and Uttara Kannada.
• Chromite: Hassan district. Bauxite: Belagavi. Limestone: Kalaburagi and Bagalkote (used for cement).

Forests, national parks and wildlife

• Forests cover about one-fifth of Karnataka's area, mainly in the Western Ghats. State animal: elephant; state bird: Indian roller.
• Karnataka has the largest elephant population in India: 6,013 in the 2021-25 DNA-based estimate (India total 22,446).
• In the 2022 tiger estimation Karnataka had 563 tigers, second only to Madhya Pradesh (785).
• Tiger reserves: Bandipur (1973, among India's first nine), Nagarhole, Bhadra, Kali (Dandeli-Anshi) and BRT (Biligiri Ranganathaswamy Temple). M. M. Hills has been proposed as a sixth but is not yet notified.
• National parks: Bandipur, Nagarhole (Rajiv Gandhi NP), Bannerghatta, Kudremukh and Anshi.
• Other sanctuaries: Ranganathittu (birds, Mandya), Daroji (sloth bears, near Hampi), Bhadra, Cauvery, Male Mahadeshwara Hills.

Ramsar sites (wetlands of international importance)

• Ranganathittu Bird Sanctuary became Karnataka's first Ramsar site in 2022.
• Three more were added later: Aghanashini Estuary (Uttara Kannada), Magadi Kere Conservation Reserve (Gadag) and Ankasamudra Bird Conservation Reserve (Vijayanagara).
• So Karnataka has 4 Ramsar sites. The Ramsar Convention was signed in 1971 at Ramsar, Iran.

💡 For wildlife questions, link each park to its district: Bandipur and BRT to Chamarajanagara, Nagarhole to Mysuru-Kodagu, Bhadra to Chikkamagaluru, Kali to Uttara Kannada.

📝 5-question quiz on this lesson: enrol free to take it and track your score.