- flow away from shore at right angles
- form when there are differences between wave height in nearshore zone
- water levels in areas with higer waves are greater than areas of lower waves, resulting in the head of water thatinduces gravity flow of water towards area of low waves.
- two opposing longshore currents meet close to shore and then flow seawards as a rip current.
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longshore currents/ longshore drift
- flow parallel to shore and transport sediment along coast.
- longshore drift= laterial movement of sediment along beaches.
- swah comes onto beach parallel to the prevailing wind
- backwash pulls sediment out to sea at right angles to the swash, creating a zig zag movement along the beach and coastline.
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