Longshore Drift: A Comprehensive Guide to Coastal Sediment Movement

Question 1

Which of these factors does NOT influence the rate of longshore drift?

Accepted Answer

Wind speed

Answer

Wave height

Answer

Angle of wave approach

Answer

Grain size of sediment

Question 2

Which of these factors does NOT affect the rate of longshore drift?

Accepted Answer

Offshore wind speed

Answer

Wave height

Answer

Sediment grain size

Answer

Beach slope

Question 3

Which of the following is NOT a factor that affects the rate of longshore drift?

Accepted Answer

Presence of offshore islands

Answer

Wave energy

Answer

Wave angle of approach

Answer

Grain size of the sediment

Question 4

Longshore drift typically occurs:

Accepted Answer

Parallel to the coastline

Answer

In a random direction

Answer

Perpendicular to the coastline

Answer

Away from the coastline

Question 5

Which of these coastal landforms is directly associated with longshore drift?

Accepted Answer

Spit

Answer

Cave

Answer

Sea stack

Answer

Salt marsh

Question 6

The dominant type of sediment transported by longshore drift is:

Accepted Answer

Sand

Answer

Gravel

Answer

Clay

Answer

Silt

Question 7

The primary purpose of a groin is to:

Accepted Answer

Trap sediment and reduce erosion

Answer

Enhance recreational opportunities

Answer

Redirect wave energy

Answer

Protect coastal structures

Question 8

The movement of sediment during longshore drift is best described as:

Accepted Answer

A zigzag motion

Answer

Circular motion

Answer

Random motion

Answer

Straight line motion

Question 9

An example of a coastal area where longshore drift is particularly pronounced is:

Accepted Answer

The Holderness Coast, UK

Answer

Dover Cliffs, UK

Answer

Isle of Wight, UK

Answer

Scilly Isles, UK

Question 10

What is the role of swash and backwash in longshore drift?

Accepted Answer

Swash moves sediment up the beach, and backwash carries it back down at an angle

Answer

Swash deposits sediment on the beach, and backwash erodes it

Answer

Swash and backwash move sediment in opposite directions

Question 11

What type of coastline is most susceptible to longshore drift?

Accepted Answer

Sandy coastline with a gentle slope

Answer

Coastline with numerous headlands and bays

Answer

Coastline protected by a coral reef

Answer

Rocky coastline with steep cliffs

Question 12

Which of the following is a negative impact of longshore drift?

Accepted Answer

Beach erosion

Answer

Increased tourism

Answer

Improved water quality

Question 13

What is a groyne?

Accepted Answer

A structure built perpendicular to the coastline to trap sediment

Answer

A type of coastal vegetation

Answer

A type of wave breaker

Question 14

What is the relationship between wave energy and longshore drift?

Accepted Answer

Higher wave energy results in stronger longshore drift

Answer

Lower wave energy results in stronger longshore drift

Answer

Wave energy has no effect on longshore drift

Question 15

Which of the following is a landform created by longshore drift?

Accepted Answer

Spit

Answer

Wave-cut platform

Answer

Sand dune

Answer

Sea stack

Question 16

What is the difference between longshore drift and onshore-offshore transport?

Accepted Answer

Longshore drift moves sediment parallel to the coastline, while onshore-offshore transport moves it perpendicular to the coastline

Answer

Longshore drift moves sediment in both directions, while onshore-offshore transport moves it in one direction

Question 17

What is the impact of longshore drift on coastal ecosystems?

Accepted Answer

It can change habitats and affect biodiversity

Answer

It only affects human activities on the coast

Answer

It always has a positive impact on coastal ecosystems

Answer

It has no impact on coastal ecosystems

Question 18

How can longshore drift be managed to mitigate its negative impacts?

Accepted Answer

By using coastal management techniques such as groynes and beach nourishment

Answer

By stopping all human activities on the coast

Answer

By building sea walls to prevent erosion

Question 19

Which of the following is NOT a factor influencing the rate of longshore drift?

Accepted Answer

Wind speed

Answer

Beach slope

Answer

Grain size

Answer

Wave height

Question 20

Which type of beach is most susceptible to longshore drift?

Accepted Answer

Sandy beach with a gentle slope

Answer

Muddy beach with a steep slope

Answer

Rocky beach with a flat slope

Question 21

Longshore drift can lead to the formation of which of the following coastal landforms?

Accepted Answer

Spits

Answer

Volcanoes

Answer

Glaciers

Answer

Meanders

Question 22

Which of the following is a potential negative impact of longshore drift?

Accepted Answer

Coastal erosion

Answer

Formation of new land

Answer

Increased biodiversity

Answer

Beach nourishment

Question 23

Groynes are structures built to:

Accepted Answer

Reduce longshore drift and protect the coastline from erosion

Answer

Measure wave height

Answer

Provide access to the beach

Answer

Increase longshore drift

Question 24

Which of the following is a method commonly used to measure longshore drift?

Accepted Answer

Sand tracing

Answer

GPS tracking

Answer

Aerial photography

Answer

Wave refraction

Question 25

Longshore drift is primarily driven by:

Accepted Answer

Waves breaking at an angle to the shoreline

Answer

Tidal currents

Answer

Wind

Answer

Gravity