The influence of waves and littoral drift on the eastern gulf clearly shows that the accumulation of sediments along the river spits gave place to formation of new lands that plays an important role in the colonization of mangroves.
In addition, the direction of the littoral drift prevents deltaic sediments of the Atrato River from being distributed along the coasts of the gulf.
Their quays and breakwaters largely block the natural littoral drift
and cause rapid accumulation to the south of these harbours and extensive erosion to the north of the latter.
The littoral drift
quantities are higher from May to October, due to heavy breakers associated with the SW monsoon season.
This strategy of construction of permanent, hard engineering structures has successively changed the circulation of sediments by littoral drift
and has partially conditioned the type of response from the coastline.
Although littoral drift
generally carries sediments to the bayheads, even the healthiest sections of the coast at the bayheads are from time to time subject to erosion.
There is no evidence for volumetrically significant sources of beach grade sediment along the Lake Michigan shore in the study areas other than that moving in the littoral drift
and derived, by erosion, from the upland bluffs and dunes.
The key words are wave measurements and modelling, wind and ship waves, wave asymmetry, fast ferries, littoral drift
, coastal erosion, sedimentation processes, port terminals, underwater irradiation, coastal winds and off-shore wind parks.
The process is called littoral drift
. But seawalls can alter the littoral drift