The Tungabhadra is a river of southern India. It is the chief tributary of the Krishna River. It formed by the confluence of two rivers, the Tunga and the Bhadra, which rise in the eastern slope of the Western Ghats, in the state of Karnataka. The Tungabhadra flows east across the Deccan Plateau, joining the Krishna in Andhra Pradesh state, from where the Krishna continues east to empty into the Bay of Bengal. The Krishna River is one of the longest rivers of India (about 900 km in length). ... The Tunga is a river in the Indian state of Karnataka. ... The Western Ghats or Sahyadri mountains run along the western edge of Indias Deccan Plateau, and separate the plateau from a narrow coastal plain along the Arabian Sea. ... Karnataka (ಕರ್ನಾಟಕ in Kannada) is one of the four southern states of India. ... Introduction The Deccan Plateau is a vast plateau in India, encompassing most of Central and Southern India. ... Andhra Pradesh (ఆంధ్ర ప్రదేశం), a state in South India, lies between 12°41 and 22°N latitude and 77° and 84°40E longitude . ... The Bay of Bengal is a sea that forms the northeastern part of the Indian Ocean. ...

The wedge of land that lies north of the Tungabhadra, between the Tungabhadra and the Krishna, is known as the Raichur Doab. The Raichur Doab is the triangular region of Andhra Pradesh and Karnataka states which lies between the Krishna River and its tributary the Tungabhadra, named for the town of Raichur. ...