River Systems and Major Tributaries of India

India’s drainage network comprises Himalayan and Peninsular river systems. Himalayan rivers are perennial, fed by glaciers and rainfall, flowing through youthful valleys. Peninsular rivers are older, rain-fed, and flow in graded channels with low gradients. These rivers drain into either the Bay of Bengal or the Arabian Sea, with a minor inland drainage system in the arid west.

Himalayan Drainage System

Indus River System

The Indus originates from the Bokhar Chu glacier near Mount Kailash in the Tibetan plateau, where it is known as Singi Khamban (Lion’s Mouth).

• Path: It enters India in Ladakh, flowing between the Ladakh and Zanskar ranges before turning into Pakistan through Gilgit.
• Left-Bank Tributaries: Zanskar, Suru, Jhelum, Chenab, Ravi, Beas, and Satluj. The Panjnad is the collective stream formed by Jhelum, Chenab, Ravi, Beas, and Satluj before joining the Indus near Mithankot.
• Right-Bank Tributaries: Shyok (originating from Rimo glacier), Nubra, Gilgit, Hunza, Gomal, Kurram, and Kabul.
• Jhelum: Originates from Verinag spring in Jammu and Kashmir, flows through Wular Lake, and forms the India-Pakistan border along the Pir Panjal range.
• Chenab: Formed by the confluence of the Chandra and Bhaga rivers near Tandi in Lahaul-Spiti, Himachal Pradesh.
• Ravi: Rises near the Rohtang Pass in Kangra, Himachal Pradesh, flowing between the Pir Panjal and Dhauladhar ranges.
• Beas: Originates at Beas Kund near Rohtang Pass and joins the Satluj at Harike in Punjab entirely within India.
• Satluj: Originates from Lake Rakshastal near Mount Kailash, enters India through Shipki La pass, and feeds the Bhakra Dam.

Ganga River System

The Ganga rises as the Bhagirathi from the Gangotri Glacier at Gaumukh in Uttarkashi district of Uttarakhand. It takes the name Ganga after meeting the Alaknanda at Devprayag.

• Alaknanda Confluences (Panch Prayag):
  • Vishnuprayag: Alaknanda meets Dhauliganga.
  • Nandaprayag: Alaknanda meets Nandakini.
  • Karnaprayag: Alaknanda meets Pindar.
  • Rudraprayag: Alaknanda meets Mandakini (Kali Ganga).
  • Devprayag: Alaknanda meets Bhagirathi.
• Left-Bank Tributaries: Ramganga, Gomti (originates from Gomat Taal/Fulhar Jheel in Pilibhit, plains-born), Ghaghara (Karnali), Gandak (Kali Gandak and Trishulganga), Burhi Gandak, Kosi (Saptakoshi), and Mahananda (rises in Darjeeling hills).
• Right-Bank Tributaries: Yamuna, Son, Punpun, and Damodar.
• Yamuna: Longest tributary, originates from the Yamunotri Glacier on the Banderpooch peak. Its right-bank tributaries are Chambal, Sindh, Betwa, and Ken; its left-bank tributaries are Hindon, Tons, and Giri.
• Son: Rises at the Amarkantak plateau in Madhya Pradesh, flowing north to meet the Ganga near Patna.
• Distributaries: Bifurcates at Farakka in West Bengal into the Bhagirathi-Hooghly in India and the Padma in Bangladesh.

Brahmaputra River System

Originates from the Chemayungdung glacier in the Kailash range south of Mansarovar lake in Tibet, where it flows east as the Yarlung Tsangpo.

• Path: Enters Arunachal Pradesh through a deep gorge near Namcha Barwa, where it is called the Siang or Dihang.
• Formation: Becomes the Brahmaputra near Sadiya after merging with the Dibang and Lohit rivers.
• Left-Bank Tributaries: Dibang, Lohit, Burhi Dihing, Dhansiri, and Kopili.
• Right-Bank Tributaries: Subansiri (antecedent river), Kameng (Jia Bhoreli), Manas, Sankosh, and Teesta.
• Teesta: Originates from Tso Lhamo lake and Pahunri glacier in Sikkim, flows through West Bengal, and joins the Brahmaputra (Jamuna) in Bangladesh.

Peninsular Drainage System

East-Flowing Rivers (Bay of Bengal Drainage)

East-flowing rivers traverse the plateau gradient from west to east and form broad deltas.

• Mahanadi: Rises near Sihawa in Dhamtari district of Chhattisgarh. Left-bank tributaries include Seonath, Hasdeo, Mand, and Ib. Right-bank tributaries include Ong, Tel, and Jonk.
• Godavari: Longest peninsular river (Dakshin Ganga), rises at Trimbakeshwar near Nashik, Maharashtra.
  • Left-bank tributaries: Penganga, Wardha, Wainganga (forming the Pranhita), Indravati, and Sabari.
  • Right-bank tributaries: Pravara, Manjira, and Maner.
• Krishna: Rises near Mahabaleshwar in Maharashtra.
  • Left-bank tributaries: Bhima, Dindi, Musi (Hyderabad sits on its banks), and Munneru.
  • Right-bank tributaries: Koyna, Panchganga, Dudhganga, Ghataprabha, Malaprabha, and Tungabhadra (formed by Tunga and Bhadra).
• Cauvery (Kaveri): Originates at Talakaveri in the Brahmagiri Hills of Kodagu, Karnataka.
  • Left-bank tributaries: Harangi, Hemavati, Shimsha, and Arkavathi.
  • Right-bank tributaries: Lakshmantirtha, Kabbani, Suvarnavathi, Bhavani, Noyyal, and Amaravathi.
  • Forms islands at Srirangapatna, Shivanasamudra, and Srirangam.
• Pennar (Uttara Pinakini): Rises in the Nandi Hills of Chikkaballapura district, Karnataka.
• Subarnarekha: Originates from the Ranchi plateau in Jharkhand, flowing through West Bengal and Odisha without major tributaries.
• Brahmani: Formed by the confluence of the South Koel and Sankh rivers near Rourkela in Odisha.
• Vaigai: Rises in the Varushanad Hills of Madurai, Tamil Nadu, and terminates in Palk Strait.

West-Flowing Rivers (Arabian Sea Drainage)

West-flowing peninsular rivers flow through structural rift valleys or short, steep coastal courses, forming estuaries rather than deltas.

• Narmada: Rises from the Amarkantak plateau in Madhya Pradesh, flowing in a rift valley between the Vindhya and Satpura ranges. Drops at Dhuandhar falls near Jabalpur. Tributaries include Hiran, Orsang, Barna, Sher, Shakkar, and Tawa (longest tributary).
• Tapti (Tapi): Rises in Multai in Betul district of Madhya Pradesh, flowing between the Satpura range and Ajanta hills. Major tributaries include Purna, Girna, Panjhra, and Bori.
• Sabarmati: Rises in the Aravalli Range in Udaipur district, Rajasthan, and drains into the Gulf of Khambhat.
• Mahi: Originates in the Vindhya Range in Dhar, Madhya Pradesh, cuts across Rajasthan and Gujarat, and crosses the Tropic of Cancer twice.
• Luni: Originates near Ajmer in the Aravalli Range as the Sagarmati, flows through the Thar Desert, and disappears in the marshy lands of the Rann of Kutch (Inland drainage).
• West-Flowing Coastal Rivers: Mandovi and Zuari (Goa), Sharavathi and Kali (Karnataka), Periyar and Bharathapuzha (Kerala).

Major River Confluences and Sources

Key Facts and Points

• Majuli, located in the Brahmaputra River in Assam, is the world’s largest inhabited freshwater river island.
• The Chambal River originates at Janapav near Mhow in the Vindhyan Range and forms a deep badland topography called the Chambal ravines.
• The Kosi River is known as the “Sorrow of Bihar” due to frequent course shifts caused by heavy silt deposition from the upper Himalayas.
• The Damodar River was historically called the “Sorrow of Bengal” and rises in the Chota Nagpur Plateau, joining the Hooghly River as its right-bank tributary.
• The Ghaghara is the largest tributary of the Ganga by water volume, originating from the Mapchachungo glacier in Tibet.
• The Gomti is the only major left-bank tributary of the Ganga that originates in the plains rather than the Himalayan glaciers.
• The Indus, Satluj, and Brahmaputra are antecedent rivers that existed before the uplift of the Himalayas, cutting deep gorges through the rising mountains.
• Bharathapuzha (also called Ponnani) is the longest river in Kerala, rising from the Anaimalai Hills.
• Periyar is the river with the largest discharge capacity in Kerala, originating in the Sivagiri Hills.
• Sharavathi River creates the Gersoppa (Jog) Falls in Karnataka, one of the highest plunge waterfalls in India.
• The Indus Waters Treaty of 1960 allocates the waters of three eastern rivers (Ravi, Beas, Satluj) to India and three western rivers (Indus, Jhelum, Chenab) to Pakistan, with specific domestic and non-consumptive usage rights for India.