2 GEOGRAPHY rivers continued

hydraulic action

the force of moving water

abrasion

material eroded by the river is scraped and dragged along the river, further eroding the river bed and banks

attrition

the load of the river becomes more round and smoothed as the angles and corners are knocked off it

solution (erosion)

this is where minerals in rocks are dissolved by the river

solution (processes)

material dissolved in water is transported within solution

suspension

light material can be carried within the water, making it look muddy

saltation

bouncing along pebbles along the river bed

traction

the heaviest materials are rolled and scraped along the river-bed usually is when the river has a higher volume