common features of a River

• source- the beginnning or start of a River

  
• Course- the route a River takes to sea
• confluence- the point at which two rivers or streams join together
• Tributary- a stream or smaller river that flows into a larger stream or River
• Mouth- the point where a river comes to the end, usually when entering the sea
• Drainage basin- the area of land drained by water
• Watershed- the area of high ground which seperates two drainage basins
• Estuary- the part of the River mouth that is tidal