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SSC CGL Indian Rivers & Lakes

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This page covers SSC CGL Indian Rivers & Lakes with complete concept notes, 15 graded practice MCQs, key points and exam-specific tips. Free to study.

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Concept Notes

Indian Rivers & Lakes— Rules & Concept

Core ConceptRead this first — the foundation of the topic
Rivers are broadly divided into two types

Himalayan Rivers and Peninsular Rivers. Each type has unique features that examiners love to test. --- KEY RULES / PROPERTIES --- HIMALAYAN RIVERS: • Origin: Glaciers in the Himalayas • Nature: Perennial (flow throughout the year) • Action: Both erosional and depositional • Examples: Ganga, Yamuna, Brahmaputra, Indus, Satluj, Ravi, Beas, Chenab, Jhelum • These rivers are older than the Himalayas — they are called 'Antecedent Rivers' PENINSULAR RIVERS: • Origin: Plateau regions (Deccan Plateau, Western Ghats) • Nature: Seasonal (depend on rainfall, dry in summer) • Action: Mostly depositional • Most flow EAST into Bay of Bengal (except Narmada and Tapi — they flow WEST) • Examples: Godavari, Krishna, Kaveri, Mahanadi, Narmada, Tapi KEY RIVER FACTS TO MEMORISE: • Longest River in India: Ganga (2525 km) • Largest River by volume: Brahmaputra (also called Tsangpo in Tibet, Jamuna in Bangladesh) • Brahmaputra flows EAST in Tibet, then turns WEST after Namcha Barwa — forms a gorge (deepest gorge in world) • Indus originates from Mansarovar Lake (Tibet) near Bokhar Chu glacier • Ganga originates from Gangotri Glacier (Bhagirathi + Alaknanda meet at Devprayag = Ganga) • The five prayags (confluences): Vishnu Prayag, Nanda Prayag, Karna Prayag, Rudra Prayag, Dev Prayag • Yamuna originates from Yamunotri Glacier; joins Ganga at Prayagraj (Triveni Sangam with Saraswati) WESTWARD FLOWING RIVERS TRICK: 'NT' — Narmada and Tapi (Tapti) flow WEST into Arabian Sea. All other major peninsular rivers flow EAST

TRIBUTARIES QUICK LIST

• Ganga tributaries (left bank): Gomti, Ghaghra, Gandak, Kosi • Ganga tributaries (right bank): Yamuna, Son, Chambal, Betwa • Brahmaputra tributaries: Dibang, Lohit, Subansiri, Teesta INDIAN LAKES: • Largest freshwater lake: Wular Lake (J&K) • Largest saltwater lake: Chilika Lake (Odisha) — also largest coastal lagoon in Asia • Highest lake: Cholamu Lake (Sikkim) — highest in India, also source of Teesta River • Lonar Lake (Maharashtra): Crater lake formed by meteorite impact — saltwater • Dal Lake: Jammu & Kashmir (famous for houseboats) • Sambhar Lake: Rajasthan — largest inland saltwater lake in India • Loktak Lake: Manipur — has floating islands called 'Phumdis' ---

Formula BlockMemorise — at least one formula appears in every paper

--

Shortcut 1 — 'NT Rule': Narmada + Tapi = flow WEST. All others = EAST.
Shortcut 2 — 'Left = GGGG': Left bank tributaries of Ganga = Gomti, Ghaghra, Gandak, Kosi.

Shortcut 3 — 'Salt vs Fresh Lakes': Chilika (salt, largest coastal), Wular (fresh, largest), Sambhar (salt, inland).

---

Exam PatternsWhat examiners ask — read before attempting PYQs

--- Examiners ask: 1. 'Which river flows through which state/city?' 2. 'Which river originates from which source?' 3. 'Left bank vs right bank tributaries' 4. 'Largest/Longest/Highest rivers and lakes' 5. 'Which rivers flow westward?' ---

Worked ExampleSolve this step-by-step before moving on
1
Step 1

Think — which river causes floods in Bihar? → Kosi River

2
Step 2

Kosi frequently floods Bihar due to its changing course Answer: Kosi River Bonus: 'Sorrow of Bengal' = Damodar River (before dams); 'Sorrow of Odisha' = Mahanadi (old name) --- WORKED EXAMPLE 2 --- Q: Where does the Bhagirathi and Alaknanda meet to form the Ganga?

1
Step 1

Recall the five Prayags — Devprayag is the last one

2
Step 2

At Devprayag, Bhagirathi + Alaknanda merge

3
Step 3

This combined river is called GANGA from this point Answer: Devprayag (Uttarakhand) ---

Exam TrapsCommon mistakes students make — avoid these

(BIG TRAP) --- Students confuse: Largest SALTWATER lake vs Largest INLAND saltwater lake. Chilika Lake = Largest saltwater lake overall (coastal lagoon, Odisha) Sambhar Lake = Largest INLAND saltwater lake (Rajasthan) Both answers appear in options. Read the question word carefully. This trap appears in almost every paper!

Key Points to Remember

  • Himalayan rivers are perennial; Peninsular rivers are seasonal — this is a favourite one-liner in SSC CGL
  • TRICK 'NT Rule': Only Narmada and Tapi (Tapti) flow WEST into the Arabian Sea; all other peninsular rivers flow EAST
  • Ganga = Bhagirathi + Alaknanda meeting at Devprayag; length = 2525 km (longest river in India)
  • Brahmaputra is called Tsangpo in Tibet, Dihang in Arunachal Pradesh, and Jamuna in Bangladesh
  • TRICK 'Left = GGGG': Left bank tributaries of Ganga are Gomti, Ghaghra, Gandak, Kosi
  • Wular Lake (J&K) = Largest freshwater lake; Chilika Lake (Odisha) = Largest saltwater/coastal lagoon lake
  • Sambhar Lake (Rajasthan) = Largest INLAND saltwater lake — do NOT confuse with Chilika
  • Loktak Lake (Manipur) has floating islands called 'Phumdis' — unique feature tested in MCQs
  • Kosi River = 'Sorrow of Bihar'; Damodar River = 'Sorrow of Bengal' (before dams were built)
  • Lonar Lake (Maharashtra) is a crater lake formed by a meteorite impact — it is saline in nature

Exam-Specific Tips

  • Ganga originates from Gangotri Glacier and its length is 2525 km — it is the longest river in India
  • Brahmaputra creates the world's deepest gorge near Namcha Barwa mountain in Arunachal Pradesh
  • Chilika Lake in Odisha is the largest coastal lagoon in Asia and the largest saltwater lake in India
  • Sambhar Lake in Rajasthan is the largest inland saltwater lake in India — it is NOT the largest overall
  • Cholamu Lake in Sikkim is the highest lake in India and is the origin of the Teesta River
  • Loktak Lake in Manipur is the only floating lake in the world and contains floating landmasses called Phumdis
  • Indus River originates from Mansarovar Lake region near Bokhar Chu glacier in Tibet
  • Yamuna joins Ganga at Prayagraj at the Triveni Sangam — the invisible Saraswati is the third river
Practice MCQs

Indian Rivers & Lakes — Practice Questions

15graded MCQs · easy to hard · full solution & trap analysis

All MCQs →
Practice 1easy

Loktak Lake, known for its floating islands called 'Loktak Phumdis,' is located in which state?

Practice 2easy

Loktak Lake, known for its unique floating ecosystem, is located in which Indian state?

Practice 3easy

The Yamuna River, a major tributary of the Ganges, originates from which mountain range?

Practice 4easy

Lake Sambhar, one of India's largest salt lakes, is located in which state?

Practice 5easy

Lake Sambhar, the largest saltwater lake in India, is located in which state?

Practice 6easy

Which of the following is a tributary of the Brahmaputra River?

Practice 7medium

The Narmada River, also known as the 'Marble Rocks River,' originates from which location?

Practice 8medium

The Wular Lake, the largest freshwater lake in India, is located in which union territory/state?

Practice 9medium

Loktak Lake, known for its unique floating ecosystem, is located in which state?

Practice 10medium

Which of the following rivers is the longest tributary of the Ganges River by length?

Practice 11hard

Which of the following pairs correctly matches an Indian lake with its primary source of water and the state(s) it is located in?

Practice 12hard

The Brahmaputra River, one of Asia's largest rivers, originates in the Chemayungdung glacier. Through which of the following countries does it flow before entering India?

Practice 13hard

The Brahmaputra River, one of India's major rivers, originates in the Chemayungdung glacier. Through which of the following countries does it flow before entering India?

Practice 14hard

The Narmada River, which flows through central India, originates in the Amarkantak plateau. Which state does it NOT flow through on its westward journey to the Arabian Sea?

Practice 15hard

Lake Sambhar in Rajasthan is India's largest saltwater lake by surface area. Which of the following is the PRIMARY source of water for Lake Sambhar?

60-Second Revision — Indian Rivers & Lakes

  • Remember: NT Rule — Only Narmada and Tapi flow WEST (Arabian Sea); all other major peninsular rivers flow EAST (Bay of Bengal)
  • Remember: Ganga = Bhagirathi + Alaknanda at Devprayag; originates from Gangotri Glacier; length = 2525 km
  • Remember: Left bank of Ganga = GGGG (Gomti, Ghaghra, Gandak, Kosi); Right bank = Yamuna, Son, Chambal
  • Trap: Chilika (Odisha) = largest saltwater lake overall; Sambhar (Rajasthan) = largest INLAND saltwater lake — read question carefully
  • Remember: Wular Lake = largest freshwater lake (J&K); Cholamu Lake = highest lake in India (Sikkim)
  • Remember: Kosi = Sorrow of Bihar; Damodar = Sorrow of Bengal; Brahmaputra = oldest river (antecedent)
  • Trap: Brahmaputra has multiple names — Tsangpo (Tibet), Dihang (Arunachal), Jamuna (Bangladesh) — name-based questions are very common
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