What is the movement of sand down the beach called quizlet?

What is the movement of sand down the beach called quizlet?

Longshore drift is also called longshore transport. It is the movement down the beach of the sediment in a zigzag pattern. The longshore current is responsible for this transport. By breaking at an angle, waves move sand and water the beach in a zigzag manner.

What is the purpose of hard stabilization?

To prevent sand from moving down the coast, coastal communities may build a groin, which is a hard stabilization structure built at a right angle to the shore to maintain or widen beaches. Hard stabilization structures may also be built parallel to the shoreline to protect property and coastal structures.

What is the net movement of sand particles in one direction along a beach face called?

Littoral drift refers to the movement of entrained sand grains in the direction of the longshore current. Figure 2.1: Development of longshore current as a result of waves approaching the beach at an angle. Littoral drift refers to the net movement of sand grains in the direc- tions of the longshore current.

What makes a beach?

A beach is a narrow, gently sloping strip of land that lies along the edge of an ocean, lake, or river. Materials such as sand, pebbles, rocks, and seashell fragments cover beaches. Most beach materials are the products of weathering and erosion. Over many years, water and wind wear away at the land.

What is the movement of water down the beach?

The movement of a wave up the beach is known as the swash, its movement down the beach is known as the backwash.

What is it called when sand moves?

Thus beach sand can move downbeach in a sawtooth fashion many tens of meters (yards) per day. This process is called beach drift, but some workers regard it as simply part of longshore drift because of the overall movement of sand parallel to the coast.

What are the 4 types of stabilization structures?

They’re all artificial shoreline stabilization structures built to protect inland human constructions and fight erosion. Breakwaters, groins, jetties, and seawalls have a significant impact on the shoreline and can even incidentally create, improve or destroy surf breaks and surfing waves.

What is a jetty on the beach?

Jetties are another type of shore perpendicular structure and are placed adjacent to tidal inlets and harbors to control inlet migration and minimize sediment deposition within the inlet. Similar to groins, jetties may significantly destabilize the coastal system and disrupt natural sediment regimes.

Which is a groyne?

A groyne is a shore protection structure built perpendicular to the shoreline of the coast (or river), over the beach and into the shoreface (the area between the nearshore region and the inner continental shelf), to reduce longshore drift and trap sediments.

What is the movement of sand back and forth and down the coast called?

This slight angle between swash and backwash along the beach creates a current called the longshore current. Waves stir up sand in the surf zone and move it along the shore. This movement of sand is called longshore drift.

What is the movement of material along a beach called?

Longshore (littoral) drift is the movement of material along the shore by wave action. It happens when waves approach the beach at an angle. The swash (waves moving up the beach) carries material up and along the beach.

What is movement of sand along the beach by wave swash and backwash known as?

The combined effects of sediment transport within the surf zone by the longshore current and sediment movement along the beach by swash and backwash is known as longshore transport , or littoral drift .

What is it called when waves dropping sand on the beach?

Answer. waves dropping sand on the beach. deposition.