Son River

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The Son River of central India is the largest of the Ganges' southern tributaries. The Son originates in Chhattisgarh state, just east of the headwaters of the Narmada River, and flows north-northwest through Madhya Pradesh state before turning sharply eastward when it encounters the southwest-northeast-running Kaimur Range. The Son parallels the Kaimur Range, flowing east-northeast through Uttar Pradesh and Bihar states to join the Ganges just above Patna. Geologically, the lower valley of the Son is an extension of the Narmada Valley, and the Kaimur Range an extension of the Vindhya Range.

The Son river at 784 kilometres (487 miles) long, is one of the largest rivers of India. Its chief tributaries are the Rihand and the Koel. The Son has a steep gradient (35-55 cm per km) with quick run-off and ephemeral regimes, becoming a roaring river with the rain-waters in the catchment area but turning quickly into a fordable stream. The Son, being wide and shallow, leaves disconnected pools of water in the remaining part of the year. The channel of the Son is very wide (about 5km at Dehri) but the floodplain is narrow, only 3 to 5 km wide. In the past, the Son has been notorious for changing course, as is traceable from several old beds on its east. In modern times this tendency has been checked with the anicut at Dehri, and now more so with the Indrapuri Barrage, a few km upstream.

Waters of South Asia
Inland	Indus \| Ganges \| Yamuna \| Chenab \| Jhelum \| Brahmaputra \| Godavari \| Narmada \| Tapti \| Ravi \| Beas \| Sutlej \| Dudh Kosi \| Padma \| Sarasvati \| Krishna \| Kaveri \| Meghna \| Mahanadi \| Son \| Ghaghara \| Betwa \| Chambal \| Koshi \| Sapt Koshi \| Tamur \| Mo Chhu \| Sankosh \| Drangme Chhu \| Ganga basin \| Ganges Delta \| Indus Delta \| Dal Lake \| Pookode Lake \| Skeleton Lake \| Chilika Lake \| Lake Powai \| Borith Lake \| Saiful Muluk \| Gosaikunda \| Nizam Sagar \| Red Hills Lake \| Malampuzha \| Kerala Backwaters
Off the Coast	Indian Ocean \| Arabian Sea \| Laccadive Sea \| Bay of Bengal \| Gulf of Kutch \| Gulf of Khambhat \| Palk Bay \| Gulf of Mannar
Main	Reservoirs and dams in India \| Lakes of India \| Rivers of India \| Lakes of Pakistan \| Rivers of Pakistan \| Rivers of Bangladesh \| Rivers of Bhutan \| Lakes of Nepal \| Rivers of Nepal