Master10
Rivers, Lakes, Dams & Water Resources Module

Himalayan & Peninsular River Systems

India's drainage network is divided into perennial Himalayan river systems and seasonal Peninsular river systems. The Himalayan group comprises the Indus, the Ganga, and the Brahmaputra, sustained by glacial melt and monsoonal precipitation. The Ganga river basin is marked by the sacred Panch Prayags (Vishnuprayag, Nandaprayag, Karnaprayag, Rudraprayag, and Devprayag) where the Alaknanda merges with sister streams before emerging as the Ganga. In contrast, Peninsular rivers like the Godavari (Dakshin Ganga), Krishna, Kaveri, Mahanadi, Narmada, and Tapti flow through mature, graded valleys, with the Narmada and Tapti carving rift valleys that drain westward into the Arabian Sea.

Key Concepts & Examination Highlights

  • Devprayag in Uttarakhand is the holy confluence where the Alaknanda and Bhagirathi rivers merge to form the Ganga.
  • The Godavari River, originating at Trimbakeshwar in Maharashtra, is the longest peninsular river in India (1,465 km) and is known as 'Dakshin Ganga' or 'Vridha Ganga'.
  • The Narmada and Tapti (Tapi) rivers flow westward through tectonic rift valleys between the Vindhya and Satpura ranges, discharging into the Arabian Sea without forming deltas.
  • The Brahmaputra River originates from the Chemayungdung glacier near Lake Manasarovar as the Yarlung Tsangpo in Tibet before entering India through Arunachal Pradesh as the Siang/Dihang.
  • The Panch Prayags on the Alaknanda River in Uttarakhand are Vishnuprayag (Dhauliganga confluence), Nandaprayag (Nandakini confluence), Karnaprayag (Pindar confluence), Rudraprayag (Mandakini confluence), and Devprayag (Bhagirathi confluence).
  • The Indus River has five major left-bank tributaries in the Punjab plains known as the Panjnad: Jhelum, Chenab, Ravi, Beas, and Sutlej.
  • The Chenab River (Chandrabhaga) is the largest tributary of the Indus by volume, formed by the confluence of the Chandra and Bhaga rivers at Tandi in Lahaul.
  • The Mahanadi River originates in the highlands of Raipur district in Chhattisgarh, drains Odisha, and forms a vast delta before emptying into the Bay of Bengal.
  • The Kaveri River originates at Talakaveri in the Brahmagiri Range of Kodagu (Coorg), Karnataka, with major tributaries including the Kabini, Hemavati, Shimsha, Bhavani, and Amaravati.
  • The Krishna River originates near Mahabaleshwar in the Western Ghats and flows through Maharashtra, Karnataka, Telangana, and Andhra Pradesh into the Bay of Bengal.
  • The Luni River is an ephemeral, endorheic river originating in the Aravalli Range near Ajmer that discharges into the marshy Rann of Kutch without reaching the sea.
  • The Chambal River originates in the Janapav hills of the Vindhya Range in Madhya Pradesh and is famous for creating badland topography (Chambal ravines) before joining the Yamuna.
  • Himalayan rivers are perennial as they are fed by both melting glaciers and monsoon rainfall, whereas Peninsular rivers are seasonal, depending almost exclusively on rainfall.
  • Himalayan rivers exhibit antecedent drainage, having carved deep V-shaped valleys and gorges (like the Indus and Brahmaputra gorges) as the mountain ranges uplifted.
  • Peninsular rivers flow through shallow, broad, and graded valleys, having reached a mature stage of geomorphic development.
  • The Indus Water Treaty (IWT) was signed in 1960 between India and Pakistan, mediated by the World Bank, allocating the Eastern rivers (Ravi, Beas, Sutlej) to India and Western rivers (Indus, Jhelum, Chenab) to Pakistan.
  • The Ganga river basin is the largest river basin in India, covering approximately 8.6 lakh km² (more than 26% of India's total land area).
  • The Brahmaputra exhibits braided channel morphology in the Assam Valley, with recurrent shifting sandbars (chars) and high siltation rates during the monsoon.
  • The Godavari basin is the largest among all Peninsular river basins, draining parts of Maharashtra, Telangana, Andhra Pradesh, Chhattisgarh, Odisha, and Karnataka.
  • The Krishna river originates at Mahabaleshwar and flows eastward across Maharashtra, Karnataka, Telangana, and Andhra Pradesh into the Bay of Bengal.
  • The Cauvery river basin is unique among Peninsular rivers because it receives rainfall from both the South-West Monsoon (in its upper catchment) and the North-East Monsoon (in its lower basin).
  • The Narmada and Tapi flow westwards in structural rift valleys created by tectonic downfaulting between the Vindhyan and Satpura ranges.
  • The Sabarmati and Mahi rivers originate in Rajasthan and flow southwest through Gujarat into the Gulf of Khambhat.
  • The Pennar (Pinakini) and Palar rivers are significant eastward-flowing Peninsular rivers draining the semi-arid tracts of Karnataka and Andhra Pradesh into the Bay of Bengal.
  • The National River Conservation Plan (NRCP) and Namami Gange Programme are apex central initiatives aimed at pollution abatement and ecological rejuvenation of Indian river basins.
  • Himalayan rivers are perennial, originating from snow-capped mountains and glaciers, receiving water from both melting snow and monsoon precipitation.
  • Peninsular rivers are predominantly seasonal and rain-fed, experiencing significant fluctuations in discharge and running dry or low during summer.
  • Himalayan rivers are antecedent and consequent in nature, actively eroding deep V-shaped valleys, gorges, rapids, and depositing vast alluvial floodplains.
  • Peninsular rivers flow through shallow, graded, broad valleys with gentle gradients, having largely reached their base level of erosion.
  • The Indus, Ganga, and Brahmaputra river systems constitute the three major Himalayan drainage networks spanning northern and northeastern India.
  • The Godavari, Krishna, Cauvery, Mahanadi, Narmada, and Tapi river systems constitute the primary peninsular drainage networks.
  • Himalayan rivers form extensive, winding meanders and frequently change their courses, exemplified by the dramatic shifting of the Kosi River.
  • Peninsular rivers follow fixed, hard-rock structural courses with minimal meandering due to the rigid crystalline bedrock of the Deccan Shield.
  • Himalayan rivers form massive deltas at their mouths, including the Sundarbans Delta, the largest river delta in the world.
  • Among peninsular rivers, east-flowing rivers (Godavari, Krishna, Cauvery, Mahanadi) form deltas, while west-flowing rivers (Narmada, Tapi) form estuaries.
  • The Indus Waters Treaty was signed on September 19, 1960, between Indian Prime Minister Jawaharlal Nehru and Pakistani President Ayub Khan, brokered by the World Bank.
  • Under the Indus Waters Treaty, India was allocated unrestricted use of the three Eastern Rivers: Sutlej, Beas, and Ravi.
  • Pakistan was allocated the waters of the three Western Rivers: Indus, Jhelum, and Chenab, with India permitted run-of-the-river hydroelectric generation and non-consumptive uses.
  • The Permanent Indus Commission (PIC), comprising Commissioners from India and Pakistan, meets regularly to oversee implementation and resolve treaty disputes.
  • Article 262 of the Constitution of India empowers Parliament to provide by law for the adjudication of disputes relating to inter-state rivers or river valleys.
  • Under Article 262(2), Parliament may by law exclude the jurisdiction of the Supreme Court or any other court in respect of inter-state water disputes.
  • The Inter-State River Water Disputes Act, 1956 (IRWD Act), was enacted under Article 262 to establish ad-hoc tribunals for adjudicating river disputes.
  • The River Boards Act, 1956, was enacted under Entry 56 of the Union List for the regulation and development of inter-state rivers and valleys.
  • The Cauvery Water Disputes Tribunal (CWDT) was constituted in June 1990 to adjudicate water sharing among Karnataka, Tamil Nadu, Kerala, and Puducherry.
  • The CWDT delivered its final award in February 2007, which was modified by the Supreme Court of India in February 2018 allocating 404.25 tmcft to Tamil Nadu and 284.75 tmcft to Karnataka.
  • The Cauvery Water Management Authority (CWMA) and Cauvery Water Regulation Committee (CWRC) were constituted in 2018 to implement the final award.
  • The Krishna Water Disputes Tribunal-I (KWDT-I), headed by Justice R.S. Bachawat, gave its award in 1973 allocating Krishna waters among Maharashtra, Karnataka, and Andhra Pradesh.
  • The Krishna Water Disputes Tribunal-II (KWDT-II), headed by Justice Brijesh Kumar, was set up in 2004 to re-examine allocations and consider surplus water sharing.
  • The Godavari Water Disputes Tribunal (GWDT), headed by Justice R.S. Bachawat, was established in 1969 and finalized its award in 1980.
  • The Narmada Water Disputes Tribunal (NWDT), chaired by Justice V. Ramaswami, was constituted in 1969 to resolve disputes between Gujarat, Madhya Pradesh, Maharashtra, and Rajasthan.
Curriculum & Reference Sources: Survey of India, Central Water Commission (CWC), and National Institute of Hydrology (NIH).

Sample Solved Questions & Concept Explanations

8 Verified Concept Questions
Q1.HARD

At which sacred confluence (Prayag) in Uttarakhand do the Alaknanda and Pindar rivers merge?

Q2.EASY

At which sacred confluence (Prayag) in Uttarakhand do the Bhagirathi and Alaknanda rivers meet to officially form the Ganga?

Q3.EASY

The Yamuna River, the longest tributary of the Ganga, originates from which glacier in Uttarakhand?

Q4.EASY

The Godavari River, the longest river of peninsular India (1,465 km), originates near Trimbakeshwar in which district of Maharashtra?

Q5.EASY

The Kaveri (Cauvery) River originates at Talakaveri in the Brahmagiri Range located in which district of Karnataka?

Q6.EASY

The Narmada River, which flows westward through a rift valley, originates from the Maikal Range at which plateau in Madhya Pradesh?

Q7.MEDIUM

The Krishna River originates in the Western Ghats near which hill station in Satara district of Maharashtra?

Q8.MEDIUM

Which river, historically called the 'Sorrow of Bengal' due to devastating floods, rises in the Chota Nagpur Plateau of Jharkhand?