Please enable JavaScript.
Coggle requires JavaScript to display documents.
Low Energy Environment (Nile delta) - Coggle Diagram
Low Energy Environment (Nile delta)
Inputs
4.26t/ha/year of sediment from the river nile, 120 million tonnes of sediment per year
sediment up to 9.6m deep
winds form NW (55 to 60% of the time)
climate change = 1.2m sea level rise every year
Aswan high dam
processes
deposition has been greater than erosion for 3000 years
Waves are creating bars with lagoons behind them which fill in with sediment
Longshore drift to the east
since the dam was build erosion was up 148m per year in places
Outputs
Arcuate delta
2 Tributaries (damietta and rosetta)
Bars, sand dunes, lagoons, salt marshes
east of Abu qir bay there are parallel bars formed by longshore drift, west there are crescent bars due to rip current
Impacts by people
rising sea levels
aswan high dam
short term changes
each wave moves sand in LSD
erosion form each wave
deposition of each wave
Medium term changes
bars grow and get filled in
waves creating bars
deposition behind dam
since the dam was build erosion was up to 148m per year
Long term changes
deposition being greater than erosion for 3000 years
sea levels rising
key facts
how much sediment does the Aswan high dam trap = 120m tonnes per year
deposition being greater than erosion for 3000 years
How much sediment does the Nile carry? = 4.36 t/ha/year
What feature is being created behind curved bars at the delta edge?
= lagoons