The Hooghly River or the Bhāgirathi-Hooghly, is an approximately 260 kilometres (161.6 mi) long distributary

Distributary

A distributary, or a distributary channel, is a stream that branches off and flows away from a main stream channel. They are a common feature of river deltas. The phenomenon is known as river bifurcation. The opposite of a distributary is a tributary...

 of the Ganges River

Ganges River

The Ganges or Ganga, , is a trans-boundary river of India and Bangladesh. The river rises in the western Himalayas in the Indian state of Uttarakhand, and flows south and east through the Gangetic Plain of North India into Bangladesh, where it empties into the Bay of Bengal. By discharge it...

 in West Bengal

West Bengal

West Bengal is a state in the eastern region of India and is the nation's fourth-most populous. It is also the seventh-most populous sub-national entity in the world, with over 91 million inhabitants. A major agricultural producer, West Bengal is the sixth-largest contributor to India's GDP...

, India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

. It splits from the Ganges as a canal

Canal

Canals are man-made channels for water. There are two types of canal:#Waterways: navigable transportation canals used for carrying ships and boats shipping goods and conveying people, further subdivided into two kinds:...

 in Murshidabad District

Murshidabad district

Murshidabad district is a district of West Bengal in eastern India. Situated on the left bank of the river Ganges, the district is very fertile. Covering an area of 5,341 km² and having a population 5.863m it is a densely populated district and the ninth most populous in India...

 at the Farakka Barrage

Farakka Barrage

Farakka Barrage is a barrage across the Ganges River, located in the Indian state of West Bengal, roughly from the border with Bangladesh near Chapai Nawabganj District. Construction was started in 1961 and completed in 1975. Operations began on April 21, 1975. The barrage is about long...

. The town of Hugli-Chinsura, formerly Hooghly, is located on the river, in the Hooghly (district). The origins of the Hooghly name are uncertain, whether the city or the river was named first.
The Farakka Barrage is a dam that diverts water from the Ganges into a canal

Canal

Canals are man-made channels for water. There are two types of canal:#Waterways: navigable transportation canals used for carrying ships and boats shipping goods and conveying people, further subdivided into two kinds:...

 near the town of Tildanga in Murshidabad District

Murshidabad district

Murshidabad district is a district of West Bengal in eastern India. Situated on the left bank of the river Ganges, the district is very fertile. Covering an area of 5,341 km² and having a population 5.863m it is a densely populated district and the ninth most populous in India...

.