Coastal retreat

Question 1

What can hard engineering affect?

Answer 1

disturbing one part of the coast can affect further parts up the coast they may be starved of sediment supply, which can result in destruction of beaches

Question 2

What is dredging?

Answer 2

involves the removal of sediment for use in construction
increases rates of coastal retreat
removal of sediment causes depth of ocean to inc
inc destructive waves

Question 3

What is coastal recession?

Answer 3

rapid recession of coastline is caused by combination of physical and human factors

Question 4

What has dredging in California had an effect on?

Answer 4

long term implications on the supply of sediment to Santa Barbra littoral cell

Question 5

What does subareil processes effect?

Answer 5

weathering/mass move combine to inc rate of coastal recession
long rain fall weaken rock structure- leads to mass move of material
collapsed material is eroded + transported away by wave action

Question 6

What are the several factors of the rate of coastal recession?

Answer 6

short/long term wind direction

tides, seasons, weather systems and storm occurrences

Question 7

Seasons?

Answer 7

winter= rate coastal tends to be greater than during summer- brings stormy weather, higher tides and long wave fetches

Question 8

Tides?

Answer 8

linked to gravitational pull
strong pull=high tide
weak pull=low tides

Question 9

Weather systems?

Answer 9

influ by areas of high pressure, anitclones (high press) depressions (low press)
inc of high pressure reduce of r of c recession

belts of low pressure cause unsettled weather

Question 10

wind direction?

Answer 10

controls movement of waves- influ rate of coastal erosion

wind direction causes powerful destructive waves to attack coastline