4.4 Human Activity Flashcards
Name two hard engineering processes
Groynes and sea wall
Name two soft engineering techniques
Beach nourishment and slope stabilisation.
Give two positives about groynes
Good for tourists
Builds up beaches
Give two negatives about groynes
Looks ugly
Very expensive
Erosion is worse down shore
Two positives of sea walls
Reflects wave energy
Out to sea
Very effective
Two negatives of sea walls
Very expensive
Makes beach access hard
Looks ugly
Two positives of beach nourishment
Absorbs water
Relatively cheap
Looks natural
Two negatives of beach nourishment
Very high maintenance
Sediment washes out to sea
1/2 a million per km
Positives of slope stabilisation
Keeps cliff in place
Reduces mass movement
Negatives of slope stabilisation
Difficult to install
Up to one million for one slope
How does a storm surge occur
High tide is assisted by storm winds causes the water to be forced into the estuaries.
In the 2013 storm surge what were the losses
1400 homes flooded
100 million cost of damage
2 deaths