The main causes of river erosion include hydraulic action, where the force of flowing water dislodges materials from the riverbed and banks. Abrasion occurs when sediment carried by the water scrapes against the riverbanks, further wearing them down. Attrition involves rocks and sediment colliding with each other, resulting in smaller and smoother particles. Lastly, solution refers to the chemical dissolution of soluble materials like limestone in the water.
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