river, northern India. The Chambal is the chief tributary of the Yamuna River and rises in the Vindhya Range just south of Mhow, western Madhya Pradesh state. From its source it flows north into southeastern Rajasthan (Rājasthān) state. Turning northeast, it flows past Kota and along the Rajasthan–Madhya Pradesh border; shifting east-southeast, it forms a portion of the Uttar Pradesh–Madhya Pradesh border and flows through Uttar Pradesh to empty into the Yamuna after a 550-mile (900-km) course. The Banas (Banas River), Kali Sindh, Sipra, and Parbati are its chief tributaries. The Chambal's lower course is lined by a 10-mile (16-km) belt of badland gullies resulting from accelerated soil erosion and is the site of a major project in soil conservation.