How are jetties and groins similar in how they manage beach erosion?(1 point)
Responses
Both use beach nourishment to replenish sand on the beach.
Both use beach nourishment to replenish sand on the beach.
Both are hard structures that keep sand on the beach.
Both are hard structures that keep sand on the beach.
Both are soft alternative strategies that use barriers to keep sand on the beach.
Both are soft alternative strategies that use barriers to keep sand on the beach.
Both use vegetation to keep sand on the beach.
Both use vegetation to keep sand on the beach.
Neither of them use beach nourishment or vegetation to manage beach erosion. Jetties and groins are both hard structures that are used to interrupt the flow of water and prevent longshore drift from moving sand away from the beach. They trap sediment and build up the beach in front of the structures.
Which of the following is a potential drawback of using jetties to prevent beach erosion?(1 point)
Responses
Jetties block boats from being able to enter harbors.
Jetties block boats from being able to enter harbors.
Jetties are not effective until plant life has time to grow.
Jetties are not effective until plant life has time to grow.
Building jetties is more expensive than soft beach management strategies.
Building jetties is more expensive than soft beach management strategies.
Beach erosion may increase on the downdrift side of the jetties.
Beach erosion may increase on the downdrift side of the jetties.
Which of the following effects do shifting shorelines from beach erosion have on beaches?(1 point)
Responses
They cause wider beach areas.
They cause wider beach areas.
They cause narrower beach areas.
They cause narrower beach areas.
They cause an increase in sand on beaches.
They cause an increase in sand on beaches.
They cause an increase in beach currents.
They cause narrower beach areas.
What is the purpose of beach nourishment? Select the two correct answers.(1 point)
Responses
to replenish sand on a beach
to replenish sand on a beach
to remove sand from a beach to offshore
to remove sand from a beach to offshore
to mitigate beach erosion for a period of time
to mitigate beach erosion for a period of time
to help ocean life survive after beach erosion
to help ocean life survive after beach erosion
to stop all beach erosion from occurring
to stop all beach erosion from occurring
to replenish sand on a beach and to mitigate beach erosion for a period of time.
What might a city find it necessary to do when initiating a beach nourishment project?(1 point)
Responses
find a nearby cement supplier
find a nearby cement supplier
collect plants for replanting
collect plants for replanting
raise taxes
raise taxes
seek approval from the local school board
seek approval from the local school board.
(Note: Seeking approval from the relevant governing bodies, such as environmental agencies or local governments, is often necessary before initiating a beach nourishment project.)
How are vegetation management and beach nourishment similar in the ways they combat beach erosion?(1 point)
Responses
Both use long, hard structures to trap sand.
Both use long, hard structures to trap sand.
Both are inexpensive ways to fight erosion.
Both are inexpensive ways to fight erosion.
Both relocate materials back to the shore.
Both relocate materials back to the shore.
Both move sand from deeper waters inland
Neither of them use long, hard structures, nor do they move sand from deeper waters inland.
Vegetation management and beach nourishment are similar in that they both use natural, soft strategies to combat beach erosion. Vegetation management involves planting and maintaining vegetation, such as dune grass, to trap sand and stabilize the beach. Similarly, beach nourishment involves adding sand to the beach and creating dunes to prevent erosion and provide a buffer against storm waves.
In which situation would beach nourishment be a good solution to issues caused by beach erosion?(1 point)
Responses
A beach experienced massive sand loss after a recent hurricane.
A beach experienced massive sand loss after a recent hurricane.
A beach experienced sand loss due to currents and waves.
A beach experienced sand loss due to currents and waves.
A beach experienced a recent increase in its plant population.
A beach experienced a recent increase in its plant population.
A beach experienced a recent decrease in the sea turtle population.
A beach experienced sand loss due to currents and waves.
(Note: While beach nourishment may be a solution for a beach that experienced sand loss after a hurricane, it may not be the best option for a beach with a recent decrease in sea turtle population. In that case, other solutions, such as reducing light pollution or protecting sea turtle nesting areas, may be more appropriate.)