Hooghly River
The Hooghly River, also known as the Bhagirathi-Hooghly, is a major distributary of the Ganga River flowing through West Bengal. The river forms at the confluence of the Bhagirathi and Jalangi rivers near Nabadwip. The upper stretch from its bifurcation point at the Farakka Barrage to Nabadwip is called the Bhagirathi, while the downstream stretch from Nabadwip to the Bay of Bengal is known as the Hooghly. It flows south for about 260 kilometers through the fertile deltaic plains of West Bengal before emptying into the Bay of Bengal at Sagar Island.
Major Tributaries and Distributaries
The Hooghly River system receives water from several rivers originating in the Chota Nagpur Plateau and the Himalayas.
| River Name | Type | Origin Location | Confluence Point |
| Jalangi | Tributary | Feeder branch of Ganga | Nabadwip (Nadia district) |
| Churni | Tributary | Mathabhanga River | Ranaghat (Nadia district) |
| Damodor | Tributary | Chota Nagpur Plateau | Falta (South 24 Parganas) |
| Rupnarayan | Tributary | Confluence of Shilabati and Dwarakeswar | Geonkhali (Purba Medinipur) |
| Haldi | Tributary | Confluence of Kasai and Keleghai | Haldia (Purba Medinipur) |
| Raimangal | Distributary | Hooghly-Ganga Delta | Sundarbans Delta |
Port Infrastructure and Navigation
The Hooghly River serves as a vital maritime trade artery for eastern India. Kolkata Port, officially renamed Syama Prasad Mookerjee Port, is the oldest operating port in India and the only major riverine port in the country.
Silting and Dredging Challenges
The river suffers from heavy siltation, which reduces its draft capacity. Massive dredging operations are required throughout the year to maintain the shipping channel for cargo vessels heading to the Kolkata and Haldia dock systems.
Farakka Barrage Link
The Farakka Barrage was constructed in 1975 to divert controlled amounts of water from the Ganga into the Bhagirathi-Hooghly system via a 38-kilometer-long feeder canal. This diversion ensures a steady flush of freshwater to prevent Kolkata Port from silting up.
National Waterway 1 (NW-1)
The Haldia-to-Allahabad stretch of the Ganga-Bhagirathi-Hooghly river system is designated as National Waterway 1. It is the longest national waterway in India and forms the backbone of inland water transport in the region.
Historical and Cultural Settlements
The banks of the Hooghly River attracted multiple European colonial powers, earning the region the historical moniker of the “Little Europe” of Bengal.
- Calcutta (Kolkata): Established by the British East India Company as their commercial and administrative capital.
- Chinsurah: Settled by the Dutch, who established a prominent trading post and built Fort Gustavus.
- Chandannagar: Governed by the French, who maintained control over this enclave until its merger with India in 1950.
- Serampore: Administered by Denmark under the name Frederiksnagore from 1755 to 1845.
- Bandel: Settled by the Portuguese, who constructed the Basilica of the Holy Rosary, one of the oldest churches in West Bengal.
Major Engineering Structures
Howrah Bridge (Rabindra Setu)
Commissioned in 1943, this balanced cantilever bridge connects Kolkata and Howrah. It does not have any pillars in the riverbed, ensuring uninterrupted navigation.
Vidyasagar Setu (Second Hooghly Bridge)
A cable-stayed bridge located south of the Howrah Bridge. It is the longest cable-stayed bridge in India.
Vivekananda Setu and Nivedita Setu
These twin bridges at Bally connect Howrah with Dakshineswar. Vivekananda Setu is a multispan steel truss bridge, while Nivedita Setu is an extradosed cable-stayed bridge running parallel to it.
Ecological Importance and Biodiversity
The Hooghly estuary supports a rich and diverse aquatic ecosystem. The mixing of freshwater from the upper reaches with the saltwater of the Bay of Bengal creates a highly productive estuarine zone.
Ganges River Dolphin
The vulnerable Ganges River dolphin (Platanista gangetica) inhabits the freshwater stretches of the Hooghly River, particularly around the sanctuary areas.
Hilsa Migration
The Hooghly River is the primary breeding ground for the Hilsa fish (Tenualosa ilisha). The fish migrates upstream from the marine waters of the Bay of Bengal into the freshwater sections of the river during the monsoon season to spawn.
GKToday Star Facts for UPSC
- Adi Ganga: The original course of the Hooghly River passed through Tolly’s Nullah towards the south. This channel is known as Adi Ganga, and it has now largely dried up due to urban encroachment.
- Sagar Island: Located at the mouth of the Hooghly, this island hosts the annual Gangasagar Mela during Makar Sankranti. It is the second-largest congregation of pilgrims in India after the Kumbh Mela.
- First Jute Mill: India’s first jute mill was established in 1855 at Rishra on the banks of the Hooghly River by George Acland.
- Under-River Metro: The East-West Metro corridor of Kolkata features India’s first underwater transportation tunnel, constructed beneath the riverbed of the Hooghly River.
Hooghly River Recently in News
Kolkata Underwater Metro Commercial Operations (2024)
Commercial metro services commenced through the twin tunnels built 32 meters below the Hooghly riverbed, connecting the twin cities of Howrah and Kolkata.
National Green Tribunal Siltation Directives (2025)
The National Green Tribunal directed the West Bengal government to submit a comprehensive action plan to tackle the illegal discharge of industrial effluents and untreated sewage into the Hooghly estuary.
Haldia Inland Waterway Terminal Upgradation (2025)
The Inland Waterways Authority of India completed infrastructure upgrades at the Haldia multi-modal terminal on National Waterway 1 to handle regional fly ash and container transit to Bangladesh.
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