Coastal Processes and Sediment Dynamics Quiz

What is required to transport larger sediment sizes?

• Constant wave velocity

• Higher wave velocity

• Lower wave velocity

• Variable wave velocity

What is the term for the maximum depth at which waves cause significant water movement?

• Wave trough

• Wave height

• Wave crest

• Wave base

What happens to waves when they enter shallow water?

• They maintain their speed and height

• They speed up and become lower

• They disappear

• They slow down and become steeper

What is the process called when waves bend around a barrier?

• Absorption

• Reflection

• Diffraction

• Refraction

What is the movement of sediment along the coast in a zigzag pattern called?

• Tidal drift

• Wave drift

• Longshore drift

• Sediment drift

What coastal feature is formed when longshore drift deposits sand across a river mouth?

• Bar

• Lagoon

• Spit

• Tombolo

What is the effect of longshore drift on beaches?

• It causes uniform sand distribution

• It results in one beach gaining sand while another loses it

• It stops sediment movement

• It prevents erosion

What type of waves are more common in summer and help build up beaches?

• Destructive waves

• Constructive waves

• Tidal waves

• Seismic waves

What is a common consequence of building seawalls along beaches?

• Decreased erosion

• Increased erosion

• Decreased wave height

• Increased sand deposition

What is a new approach to coastal management mentioned in the video?

• Constructing more groynes

• Dredging more sand

• Creating artificial sand dunes

• Building higher seawalls