questions (exam)

Question 1

explain two processes in the formation of offshore bars

Answer 1

• offshore bars can be created when waves approach the shore but break on a submerged bar, this causes deposition of larger material that they are carrying so an offshore bar can be built up.
• offshore bars are created when berms are eroded by destructive waves. sediment from these berms is then deposited offshore in a low energy area causing offshore bars to be created which acts as sediment sinks.

Question 2

explain two local factors that increase flood risk for some countries

Answer 2

• removal of vegetation
• degree of subsidence
• amount of rivers flowing through
• if the coastline is low lying