Hydrosphere: Meanders Flashcards
meanders are…
large river bends that are common in the middle and lower course of rivers
in every river channel…
there is a series of alternating irregularities called riffles and pools
riffles and pools develop as…
water twists and turns around boulders and hard rock
pools are
areas of deep, slow moving water
riffles are
areas of shallow, fast moving water
once a pool and riffle pattern develops…
the river develops a side to side swing
mention the 3 erosional processes which erode river banks
- abrasion
- hydraulic action
- solution
erosion takes place…
on the outside bend, forming a river cliff
deposition takes place…
on the inside bend, forming a river beach
material is deposited on the inside bend because…
the water flows slowly with the least energy, so cannot carry the debris
meander formation if assisted by…
helicoidal flow
helicoidal flow is…
the corkscrew like movement of water, which removes material as the river flows downstream, aiding erosion
continuous erosion and deposition…
forms meanders, which migrate downstream and become more pronounced over time
