Musi River is a tributary of the Krishna River in the Deccan Plateau flowing through Telangana state in India. Hyderabad stands on the banks of Musi river, which divides the historic old city with the new city. Himayat Sagar and Osman Sagar are dams built on it which used to act as source of water for Hyderabad. It was known as Muchukunda river in olden days, and the precise reason for the change of name is not known.
The river originates in Anantagiri Hills near Vikarabad, Ranga Reddy district, 90 kilometers to the west of Hyderabad and flows due east for almost all of its course. It joins the Krishna River at Vadapally in Nalgonda district after covering a distance of about 240 km.
There are many bridges across the river in Hyderabad. The oldest bridge, Purana pul (meaning 'old bridge') was built during the reign of Ibrahim Qutub shah in 1579 A.D. Nayapul (meaning 'new bridge'), near High Court was added later. There are other bridges in Dabirpura, Chaderghat, Amberpet, Uppal Kalan and Tekumatla near Suryapet.
The Musi river was the cause of frequent flood devastation of Hyderabad city until the early decades of the 20th century. On Tuesday 28 September 1908, Hyderabad witnessed disastrous floods of the River Musi, flowing through the city. In one day, 17 inches of rainfall was recorded and the water level at Afzalgunj was about 11 feet (3.4 m) high. These floods caused huge devastation to Hyderabad and killed around 15,000 people.