beach

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beach,

a gently sloping zone where deposits of unconsolidated sedimentssediment,
mineral or organic particles that are deposited by the action of wind, water, or glacial ice. These sediments can eventually form sedimentary rocks (see rock).
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 are subject to wavewave,
in oceanography, an oscillating movement up and down, of a body of water caused by the frictional drag of the wind, or on a larger scale, by submarine earthquakes, volcanoes, and landslides.
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 action at the shore of an ocean or lake. Most of the sediment making up a beach is supplied by rivers or by the erosionerosion
, general term for the processes by which the surface of the earth is constantly being worn away. The principal agents are gravity, running water, near-shore waves, ice (mostly glaciers), and wind.
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 of highlands adjacent to the coast.

Beaches extend from a low waterline landward to a definite change in material or physiographic form, such as the presence of a cliff or dune complex marking a clear demarcation of the edge of a coastcoast,
land bordering an ocean or other large body of water. The line of contact between the land and water surfaces is called the shoreline. It fluctuates with the waves and tides.
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. The surf zone is the area between the landward limit of the waves and where the farthest seaward wave breaks. The foreshore, the active portion of the beach, is a seaward-sloping surface extending from the low tide limit of the beach to the crest of a ridge, called the berm, formed by storm waves. Water motion landward and seaward across the foreshore is called swash and backwash, respectively. The foreshore's slope angle is related to the size of the beach material and the vigor of the waves. The backshore extends landward from the berm as a broad terrace or gently landward-sloping surface, often broken by one or more beach ridges. Seaward of the surf zone is the offshore zone, which commonly contains a trough and an offshore bar where the waves begin to break before reforming and dispensing their energy on the beach. Along low sandy coasts, such as the Eastern coast of the United States, a long, narrow beach, called a barrier beach, is commonly separated from the coast by a narrow lagoon. Where a beach extends from land and terminates in open water it is called a spit or a hook.

Beaches undergo a cyclical migration of sand between the beach and the offshore zone caused by seasonal changes in the supply of sedimentary material and by the changes in intensity and direction of the approaching waves. The action of tides causes daily cycles of cut and fill. Waves approaching the shore obliquely move the sediment along the beach in a zigzag pattern called longshore transport. Since beaches are mobile deposits, they owe their existence to a constant replenishment of sand. In many coastal areas a deficiency in the supply of sand from human intervention or the natural changes in the coastal environment results in serious erosion problems. Artificial replenishment by pumping sand onto the beach from offshore or halting the moving sand from longshore drift by building breakwatersbreakwater,
offshore structure to protect a harbor from wave energy or deflect currents. When it also serves as a pier, it is called a quay; when covered by a roadway it is called a mole.
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 are two solutions to erosional problems.

Bibliography

See W. Bascom, Waves and Beaches: The Dynamics of the Ocean Surface, (1980).

Beach

 

a strip consisting of an accumulation of loose material on the seacoast in the surf zone. There are pebble, gravel, sand, and shell beaches. Morphologically, beaches are divided into those in the form of a gently sloping rampart and those consisting of an accumulation of drift sloping toward the sea and abutting in the back to the foot of the bluff. Owing to the varying velocity of the forward and backward movement of the surf, the size and density of the particles on the beach vary. Favorable conditions lead to the formation of mineral placers (for example, diamonds in southwestern Africa; gold in Alaska; and titanomagnetites in India, China, and Australia). The beaches of health resorts often have facilities for aerotherapy and heliotherapy.

What does it mean when you dream about a beach?

Similar to the meaning of bay, the threshold between the conscious and unconscious mind. To most people, beaches also represent recreation and relaxation. Where we go to absorb the light from the sun. (See also Bay, Sand).

beach

[bēch]
(geology)
The zone of unconsolidated material that extends landward from the low-water line to where there is marked change in material or physiographic form or to the line of permanent vegetation.
(navigation)
To intentionally run a craft ashore, as a landing ship.

beach

an extensive area of sand or shingle sloping down to a sea or lake, esp the area between the high- and low-water marks on a seacoast
References in classic literature ?
One day, however, as he was lying half asleep in the warm water somewhere off the Island of Juan Fernandez, he felt faint and lazy all over, just as human people do when the spring is in their legs, and he remembered the good firm beaches of Novastoshnah seven thousand miles away, the games his companions played, the smell of the seaweed, the seal roar, and the fighting.
And so they all came to the beaches where they had been born, and heard the old seals, their fathers, fighting in the rolling mist.
In the spring he and his people retreated from the floes to the rocky mainland, where they put up tents of skins, and snared the sea-birds, or speared the young seal basking on the beaches.
At times he served as boat's crew in the whale boats, when they brought in copra from distant beaches or when the white men went out to dynamite fish.
The beautiful beaches of Points Pedro and Pablo, where are the shrimp-catchers' villages, are made fearful by the stench from myriads of decaying fish, and against this wasteful destruction it has ever been the duty of the fish patrol to act.
The crews of most of the vessels that went ashore on the sand beaches were saved, but those that struck on the rocks went to pieces and all hands were lost.
The whole earth seethed, and sky and sea: and the long waves raged along the beaches round and about, at the rush of the deathless gods: and there arose an endless shaking.
Their few precious knives, made from lengths of hoop-iron, and their few and more precious tomahawks from cheap trade hatchets, he had surmised they had captured in war from the bushmen of the jungle beyond the grass lands, and that they, in turn, had similarly gained them from the salt-water men who fringed the coral beaches of the shore and had contact with the occasional white men.
As often as I have seen beds of mud, sand, and shingle, accumulated to the thickness of many thousand feet, I have felt inclined to exclaim that causes, such as the present rivers and the present beaches, could never have ground down and produced such masses.
The shore is composed of a belt of smooth rounded white stones like paving-stones, excepting one or two short sand beaches, and is so steep that in many places a single leap will carry you into water over your head; and were it not for its remarkable transparency, that would be the last to be seen of its bottom till it rose on the opposite side.
In the fall of the year they penetrated a weird lake country, sad and silent, where wild- fowl had been, but where then there was no life nor sign of life-- only the blowing of chill winds, the forming of ice in sheltered places, and the melancholy rippling of waves on lonely beaches.
We skirted the black coast; we skirted the sand beaches where the sea speaks in whispers to the land; and the gleam of white sand flashed back past our boat, so swiftly she ran upon the water.