CUET UG Geography Indian Geography Drainage System Himalayan vs Peninsular Rivers River Systems

Must-Know (15–20 detailed bullets)

• Himalayan rivers are perennial, fed by snowmelt and monsoon rains; example: Ganga continues flowing even in summer due to glacial melt from Gangotri Glacier.
• Peninsular rivers are seasonal, dependent on monsoon rainfall; example: Godavari dries up in summer in some stretches.
• Himalayan rivers exhibit antecedent and superimposed drainage patterns; example: Indus, Sutlej, and Brahmaputra cut across young Himalayas.
• Peninsular rivers mostly follow superimposed drainage due to ancient rock structure exposure; example: Chambal’s gorge reflects superimposition over rift valleys.
• The Indus River originates at Lake Mansarovar in Tibet and flows through Ladakh, Baltistan, and Gilgit before entering Pakistan.
• The Ganga River system originates as Bhagirathi from Gangotri Glacier and meets Alaknanda at Devprayag to form Ganga.
• The Brahmaputra originates near Lake Mansarovar in Tibet as Yarlung Tsangpo and enters India through Arunachal Pradesh at Dihang Gorge.
• The Yamuna, a major right-bank tributary of Ganga, originates from Yamunotri Glacier and joins Ganga at Prayagraj (Allahabad).
• The Son River is the largest southern tributary of Ganga, joining it near Fatuha in Bihar.
• Left-bank tributaries of Ganga include Gandak, Kosi, and Mahananda; Kosi is known as “Sorrow of Bihar” due to frequent flooding.
• The Godavari is the longest Peninsular river (1,465 km), originates in Nasik district (Maharashtra), and drains into the Bay of Bengal.
• The Krishna (1,400 km) originates at Mahabaleshwar in Maharashtra and is fed by major tributaries like Tungabhadra and Bhima.
• The Kaveri originates at Talakaveri in Kodagu (Karnataka) and flows through a rift valley between Western and Eastern Ghats.
• The Narmada and Tapi (Tapti) are west-flowing Peninsular rivers draining into the Arabian Sea; both flow through rift valleys.
• The Narmada flows between Vindhya and Satpura ranges and forms the Dhuandhar Falls near Jabalpur.
• The Tapi River originates in Betul district (Madhya Pradesh) and flows parallel to Narmada but south of it.
• The Damodar River, once known as “Sorrow of Bengal,” is now controlled by Damodar Valley Corporation (DVC) projects.
• The Luni River in Rajasthan is an inland drainage river that ends in the Rann of Kutch; it’s the largest west-flowing river in Rajasthan.
• The Kosi River is a trans-Himalayan river, drains from Nepal Himalayas, and exhibits a “braid channel” due to high sediment load.
• The Brahmaputra has a braided channel in Assam and forms Majuli, the world’s largest river island (verify from NCERT).

Difficulty Level

Intermediate — Requires distinguishing between structural, climatic, and hydrological differences with specific examples; some rivers have overlapping characteristics.

Common CUET Traps (3 bullets)

• Trap: Assuming all Peninsular rivers flow eastward.
  Avoid: Remember Narmada, Tapi, and Periyar flow westward into Arabian Sea.

• Trap: Believing Himalayan rivers are younger than Peninsular rivers in age.
  Avoid: Himalayan rivers are geologically young in course but flow over young folded mountains; Peninsular rivers flow over ancient stable shield.

• Trap: Confusing antecedent drainage with superimposed drainage.
  Avoid: Antecedent rivers existed before mountain uplift and cut through rising folds (e.g., Indus); superimposed rivers eroded over buried structures (e.g., Chambal).

Practice MCQs (5 questions)

Q1. Which river originates from the Yamunotri Glacier and is a major right-bank tributary of the Ganga?
A. Gandak
B. Kosi
C. Yamuna
D. Ghaghara

Answer: C
Explanation: Yamuna originates from Yamunotri Glacier and joins Ganga at Prayagraj as a right-bank tributary.
Why others fail: Ghaghara is also a right-bank tributary but originates in Nepal, not Yamunotri.

Q2. Which of the following rivers flows through a rift valley and drains into the Arabian Sea?
A. Godavari
B. Narmada
C. Kaveri
D. Mahanadi

Answer: B
Explanation: Narmada flows through a rift valley between Vindhya and Satpura ranges and drains into Arabian Sea.
Why others fail: Kaveri flows through a rift valley but drains into Bay of Bengal.

Q3. Which river is known as the “Sorrow of Bihar” due to its recurrent floods?
A. Gandak
B. Son
C. Kosi
D. Damodar

Answer: C
Explanation: Kosi brings heavy silt and changes course frequently, causing devastating floods in Bihar.
Why others fail: Damodar was earlier called “Sorrow of Bengal” but is now regulated by DVC.

Q4. Which of the following is a trans-Himalayan river?
A. Ganga
B. Yamuna
C. Brahmaputra
D. Sutlej

Answer: C
Explanation: Brahmaputra originates beyond the Himalayas in Tibet and enters India through a deep gorge.
Why others fail: Sutlej is also trans-Himalayan, but CUET often accepts Brahmaputra as the primary example (verify from NCERT); however, both are correct—check NCERT preference.

Q5. Consider the following statements:
1. Peninsular rivers are older than Himalayan rivers in geological history.
2. Himalayan rivers form deltas, while most Peninsular rivers form estuaries.
3. The Tapi River flows parallel to the Narmada but lies to its south.
Which of the statements are correct?
A. 1 and 2 only
B. 2 and 3 only
C. 1 and 3 only
D. 1, 2 and 3

Answer: C
Explanation: Statement 2 is incorrect—many Peninsular rivers like Godavari and Krishna form large deltas.
Why others fail: Students often assume all west-flowing rivers form estuaries and east-flowing ones form deltas, but major east-flowing rivers form deltas.

Last‑Minute Revision (15–20 one‑liners)

• ⚠️ Himalayan rivers: perennial, high erosion, antecedent/superimposed.
• ⚠️ Peninsular rivers: seasonal, fixed courses, superimposed drainage.
• ⚠️ Indus origin: Lake Mansarovar, Tibet → enters Pakistan → Arabian Sea.
• ⚠️ Ganga origin: Bhagirathi (Gangotri) + Alaknanda at Devprayag.
• ⚠️ Brahmaputra: Yarlung Tsangpo in Tibet → Dihang Gorge → Assam.
• ⚠️ Yamuna: Right bank of Ganga, joins at Prayagraj.
• ⚠️ Kosi: Left bank tributary, “Sorrow of Bihar,” high sediment.
• ⚠️ Godavari: Longest Peninsular river (1,465 km), Nasik origin.
• ⚠️ Krishna: 1,400 km, Mahabaleshwar origin, Tungabhadra tributary.
• ⚠️ Kaveri: Talakaveri (Karnataka), forms Shivasamudram Falls.
• ⚠️ Narmada: Flows west, rift valley, Dhuandhar Falls.
• ⚠️ Tapi: Parallel to Narmada, Betul origin, drains into Arabian Sea.
• ⚠️ Damodar: “Sorrow of Bengal,” now controlled by DVC.
• ⚠️ Luni: Inland drainage, ends in Rann of Kutch.
• ⚠️ Brahmaputra: Forms Majuli Island in Assam (verify from NCERT).
• ⚠️ Antecedent drainage: Rivers older than mountains (e.g., Indus).
• ⚠️ Superimposed drainage: Overridden on underlying rock (e.g., Chambal).
• ⚠️ East-flowing rivers: Form deltas (Godavari, Krishna, Kaveri).
• ⚠️ West-flowing rivers: Form estuaries (Narmada, Tapi).
• ⚠️ Mnemonic: "NGT" – Narmada, Godavari, Tapi – all start with 'N', 'G', 'T' rivers.