The Ganges is one of the major rivers of the Indian subcontinent, flowing east through the Gangetic Plain of northern India into Bangladesh. The 2,510 km (1,560 mi) river rises in the western Himalayas in the Uttarakhand state of India, and drains into the Sunderbans delta in the Bay of Bengal. It has long been considered a holy river by Hindus and worshiped as the goddess Ganga in Hinduism. It has also been important historically: many former provincial or imperial capitals (such as Patliputra, Kannauj, Kara, Allahabad, Murshidabad,and Calcutta) have been located on its banks. The Ganges Basin drains 1,000,000-square-kilometre (390,000 sq mi) and supports one of the world`s highest densities of humans. The average depth of the river is 52 feet (16 m), and the maximum depth, 100 feet (30 m). The river has been declared as India`s National River. The many symbolic meanings of the river on the Indian subcontinent were spoken to in 1946 by Jawaharlal Nehru in his Discovery of India,
The Ganges, above all is the river of India, which has held India`s heart captive and drawn uncounted millions to her banks since the dawn of history. The story of the Ganges, from her source to the sea, from old times to new, is the story of India`s civilization and culture, of the rise and fall of empires, of great and proud cities, of adventures of man. Although many small streams comprise the headwaters of the Ganges, the six longest headstreams and their five confluences are given both cultural and geographical emphasis (see the map showing the headwaters of the river). The Alaknanda River meets the Dhauliganga River at Vishnuprayag, the Nandakini River at Nandprayag, the Pindar River at Karnaprayag, and the Mandakini River at Rudraprayag and finally the Bhagirathi River at Devprayag, to form the mainstream, the Ganges. The Bhagirathi is the source stream; it rises at the foot of Gangotri Glacier, at Gaumukh, at an elevation of 3,892 m (12,769 ft). The