The Upper Course - Rain falling in highlands flow down forming a stream., The Middle Course - The fast flowing water causes erosion which makes the river deeper and wider., The Lower Course - The river is in flatland and flows slowly., Valley - The low area between hills and mountains., Channel - A groove in the land that a river flows along., Waterfall - A place where the river course is interrupted by a tall step., Rapids - Fast-flowing stretches of water where the river breaks into waves because of rocks., Gorge - A steep-sided river valley which is very narrow and deep., Meander - A bend in the river., Tributary - A stream or river that feeds into a larger watercourse., Confluence - Where two rivers meet., Floodplain - The flat land of the river valley close to the river banks.  , Levee - An embankment used to help control rivers., Delta - A fan-shaped area of sediment built up at the mouth of the river., Estuary - A drowned river valley in coastal lowland areas.,

River Key Words

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