Ohio River course forms the northern borders of West Virginia and Kentucky; and the southern borders of Ohio, Indiana and Illinois, until it joins the Mississippi River at the city of Cairo, Illinois. Where the Ohio joins the Mississippi is the lowest elevation in the state of Illinois, at . The Ohio River, which flows westward from Pittsburgh, Pennsylvania, to Cairo, Illinois, is the largest tributary, by volume, of the Mississippi River in the United States. At the confluence, the Ohio is considerably bigger than the Mississippi. Measured by long-term mean discharge in cubic feet per second and cubic meters per second,
King River (Great Southern, Western Australia) The land along the river is estimated as being 83% cleared yet the water quality is generally healthy fresh water. The salinity level of the King River at discharge is 800 mg/L. The main tributary of the King River is Mill Brook which joins the King about north-west of the Upper King Bridge. King River (Great Southern, Western Australia) The King River is a river in the Great Southern region of Western Australia. The river rises east of the town of Redmond and then flows for approximately and along with the Kalgan River drains into Oyster Harbour and finally King