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Rivers Assement 30th October (Drainage Basin (A drainage basin is an area…
Rivers Assement 30th October
Drainage Basin
A drainage basin is an area of land that filters into a river
Watershed is the entire reigon that drains into the river
Confluence is where two equal size rivers meet
Tributary is where a small and large river join
Main channel is the deepest or widest part of a river
Stages of a river
Middle
Gentler slope, with more energy and volume. It errodes material from the right and then on the left, which creates horse-shoe like meanders
Lower
No gradient at all, with Ox-bow lakes, Estuarys and Deltas form. The area that surounds a river is known as the flood plain. It floods with the river and is very fertile.
Upper
Fast flowing, the highest point and where most errosion happens
Features of a river
River bed- The channel in which a river flows in
Delta- a landform created by deposition
Meander-a bend in the river caused by erosion
Mouth- where the river ends up
Waterfall- a cascade of water caused by different rock types
Erosion
Solution- soluble rock dissolved in the water
Hydrallic action- water wearing eroding the river
Abrasion- rocks dragging along the river bed
Erosion is the wearing away of rock
Attrition- rocks smashing into each other