Geography rivers

• Confluence: the place where 2 rivers join
• Watershed: an area of highland forming the edge of a river basin
• River mouth: the point at which a river flows into the sea or lake
• The source: where a river begins
• River basin: an area of land drained by a river and it's tributaries
• Tributary: a stream or a small river flowing into a main river
• A channel: where the river flows
• Hydraulic action: the force of the water hitting the river bed and the banks
• Abrasion: broken up material carried in the water rubs against the riverbed wearing it away
• Attrition: material in the River banks bangs again each other making the stoned more rounded and smaller
• Solution: chemicals in the river water dissolves the rocks on the river bed and the banks
• Traction: the biggest boulders that are rolled along the riverbed by the force of water (transportation)
• Saltation: lighter material which water picks up when it has energy and drops it when it doesn't.Bounced along the riverbank
• Deposition: dropping of a material by the river once it's run out of energy
• Suspension: small particles (sediments) constantly being held in the water
• Vertical erosion: River erodes downwards into the riverbed which makes the river channel deeper
• Lateral erosion: the river erodes outwards (sideways) making the river channel wider