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The Work of Rivers
How Rivers Erode
Term | Definition |
---|---|
Hydraulic Action | This is the force of moving water,which breaks fragments from the bed and the banks (sides) of the river. The material carried along the river is called its load |
Abrasion | When the load hits against the bed and banks of the river and erodes them rapidly. Abrasion is the most powerful way in which rivers erode |
Attrition | The stones carried in the load of a river are themselves worn down. Stones are smoothened, rounded and made smaller by the process of attrition |
Solution | Chemicals in the water help to break down some rocks. Carbonic acid, for example, slowly dissolves limestone |