Question

explain three ways in which a river erodes its valley??

Answer 1

Rivers erode in four ways:

Abrasion or corrasion - This is when large pieces of bedload material wear away the river banks and bed.

Attrition - This is when the bed load itself is eroded when sediment particles knock against the bed or each other and break, becoming more rounded and smaller.

Hydraulic Action - This is when the force of water erodes softer rock.

Solution or corrosion - This is when acidic water erodes rock.

Answer 2

1. Corrasion- This is when large pieces of bed load material wear away the river banks and bed.
2. Attrition-This is when the bed load itself is eroded when sediment particles not against the bed or each other and break becoming more rounded and smaller.
3. Hydraulic Action-this is when the force of water erodes soft rock.
4. Solution or corrosion-this is one acidic water erodes rock.