What is Longshore Drift diagram?

What is Longshore Drift diagram?

The transport of sand and pebbles along the coast is called longshore drift. The general direction of longshore drift is decided by the prevailing wind. In the diagram below the prevailing wind is approaching from the south-west. Therefore longshore drift is moving material from the west to the east.

What are groynes ks2?

Groynes are structures running perpendicular to the shoreline, across a beach into the sea. Groynes are usually made of wood, concrete or, most commonly, piles of large rocks. The effect of a groyne is to accumulate sand on the updrift side where littoral drift is predominately in one direction.

How does longshore drift move sediment along the coast?

The prevailing wind blows waves carrying sediment into the beach at an angle, the waves break on the shore and as the water runs back into the sea it carries the sediment back down the beach, perpendicular to the angle of the shoreline under the influence of gravity.

What drifts in longshore drift?

Longshore drift from longshore current is a geological process that consists of the transportation of sediments (clay, silt, pebbles, sand, shingle) along a coast parallel to the shoreline, which is dependent on the angle incoming wave direction. The process is also known as littoral drift.

Is longshore drift erosion or deposition?

Longshore drift is the movement of material along the shore by wave action. Longshore drift happens when waves moves towards the coast at an angle. Longshore drift provides a link between erosion and deposition. Material in one place is eroded, transported then deposited elsewhere.

What landforms are created by longshore drift?

Longshore drift is a method of coastal transport. Landforms created by deposition include beaches, spits, tombolos and bars.

What is Longshore Drift ks3?

Longshore drift is a process of transportation that shifts eroded material along the coastline. Waves approach the coast at an angle. Swash carries sediment up the beach at an angle. Backwash carries sediment down the beach with gravity – at right angles to the beach.

What is longshore drift ks2?

Longshore drift is where particles of clay are transported down the coast. The particles are finally deposited further down the coast and new land is formed. The coastline is therefore always changing. The seaside town of Withernsea in Yorkshire uses coastal protection in the form of a large sea wall and groynes.

What do groynes do for kids?

From Academic Kids The effect of a groyne is to accumulate sand on the updrift side where littoral drift is predominately in one direction.

What causes Longshores?

Longshore currents are generated when a “train” of waves reach the coastline and release bursts of energy. The speed at which waves approach the shore depends on sea floor and shoreline features and the depth of the water. Also, waves do not typically reach the beach perfectly parallel to the shoreline.

Is longshore drift coastal deposition?

Features of coastal deposition Longshore drift will deposit material in the sea after the coastline has changed direction. Over time the level of the sand deposited will build-up until it is above sea level. The spit cannot develop right across the bay as the moving water from a river prevents the build-up of sand.

What is longshore drift in geography?

Sediment is carried by the waves along the coastline. The movement of the material is known as longshore drift. Waves approach the coast at an angle because of the direction of prevailing wind. The swash will carry the material towards the beach at an angle.

How can I teach students about longshore drift?

Students could be given a simple sketch map/ diagram of a coastline with arrows on to indicate the direction of longshore drift. As they watch, they should annotate the map to explain how the material is moved along the shore and what effect this has.

How is sand moved along a beach?

Sediment is moved along the coastline in a process known as longshore drift. The prevailing wind blows waves carrying sediment into the beach at an angle, the waves break on the shore and as the water runs back into the sea it carries the sediment back down the beach, perpendicular to the angle of the shoreline under the influence of gravity.

What is the movement of beach material?

Waves approach the coast at an angle because of the direction of prevailing wind. The swash will carry the material towards the beach at an angle. The backwash then flows back to the sea, down the slope of the beach. The process repeats itself along the coast in the zigzag movement. Beach material can be moved in four different ways.