The Daman Ganga, also known as Dawan River, rises in the Sahyadri hills close to Ambegaon village in Dindori taluka of Nasik district of Maharashtra State. It raise at an elevation of 950m. The major tributaries of Daman and Vag run a course of and respectively before joining at Matunji to become the Daman Ganga River. Major part of the river lies in Maharashtra. Its total length from source to the Arabian Sea is . Some of major tributaries which originate and flow through the mountainous region of the states of Maharashtra, Gujarat and the Union Territory of Dadra and Nagar Haveli and Daman and Diu are Dawan, Shrimant, Val, Rayate, Lendi, Wagh, Sakartond, Roshni, Dudhni, and Piperiya. As the river joins the sea at Daman, it is named Daman Ganga. At the estuary there is heavy sedimentation and hence the depth of water is shallow. Daman is located on both banks of the river (Portuguese name: Rio Sandalcalo). At the mouth of the river the bar is level bed made of hard sand, except for the North of the North point where the river enters the sea.