Place · shifting river channel · India
The Ganges' eastward migration
Also known as Bhagirathi, Padma, Ganges delta shift, Hooghly decline, The Ganges' eastward migration — Bhagirathi to Padma
Between roughly the sixteenth and eighteenth centuries the main discharge of the Ganges moved from the Bhagirathi–Hooghly in the west to the Padma in the east. Every city that had depended on the western channel was stranded, and the delta's active sedimentation — and its rice frontier — moved into what is now Bangladesh.
- Function
- Water & infrastructure
- Confidence
- Mixed / layered — The channel shift is supported by records and sediment work; its chronology is reconstructed and approximate.
- Location
- 24.200, 88.250 (approximate)
Worth knowing
Gaur, Pandua, Rajmahal, Murshidabad and Tamralipta all decline in the same period and for the same reason. The Farakka barrage, built in 1975 to force water back down the Bhagirathi and keep Calcutta port navigable, is an attempt to reverse this shift by engineering, and is still disputed with Bangladesh.
The chronology of the shift is reconstructed from Mughal revenue records, European maps and sediment work, and the dates are approximate rather than fixed.
Connections (3)
- Power passed toGaur (Lakhnauti)
Gaur stood on a channel of the Ganges and was a city of several square kilometres of brick mosques and gateways. When the main flow moved east to the Padma the river left it, the harbour silted, plague followed, and the capital moved to Rajmahal and then Murshidabad. The Bengal sultanate's principal city is now farmland in Malda, and hydrology rather than conquest emptied it.
- Alternative toHooghly–Chinsurah
As the Ganges moved east the Bhagirathi-Hooghly declined as a river and rose as a European settlement: shallow enough to keep out rivals' large ships, deep enough for the companies' own. Calcutta's whole existence depends on a dying channel, which is why the Farakka barrage was built in 1975 to force water back down it, and why that is still disputed with Bangladesh.
- Site withinMurshidabad
The Ganges' eastward migration lies within Murshidabad — the two sites sit about 4 km apart, well inside the city's historical boundary and part of the same urban or peri-urban landscape. The Ganges' eastward migration is one of the specific sites that give Murshidabad its layered character, and reads differently when seen as a stop within the larger city rather than as an isolated monument on an open map. The surrounding neighbourhoods, roads and other heritage ensembles belong to the same single urban fabric.
On these journeys
- Rivers that moved
- The Gangā — Gomukh to the Sundarbans
- Bengal before partition — the delta as one landscape
Sources
Wikipedia, “Bhagirathi River”. Richard M. Eaton, The Rise of Islam and the Bengal Frontier 1204–1760 (1993), chapter on the delta's eastward movement; Kanangopal Bagchi, The Ganges Delta (1944).
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