AIR PRESSURE

DEFINITION AIR PRESSURE IS THE DOWNWARD FORCE EXERTED BY THE WEIGHT OF AIR PER UNIT AREA ON THE EARTH’S SURFACE. AIR PRESSURE MAY VARY WITH ALTITUDE AND TEMPERATURE. AIR PRESSURE IS GREATER AT THE SEA LEVEL AND DECREASES WITH INCREASING ALTITUDE. INSTRUMENT USED BAROMETER ANEROID BAROGRAPH ISOBARS IS THE LINES ARE JOINING PLACES WITH EQUAL […]

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FORMATION OF SPITS AND TOMBOLOS

A Spit is a long, narrow ridge of deposited materials that extends from the mainland into the sea. An example in Brunei is Muara Spit and Kuala Tutong Spit. When the spit is connected the island to the mainland to form a feature is called the Tombolos. The long shore drift transports materials along the […]

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FORMATION OF OFFSHORE BAR

Off shore bar is a long narrow ridge of deposited materials sand can be found lying away from and parallel to a coast. When the waves approach a gently sloping coast , friction between the waves and the sea bed causes the waves to break at some distance from the coast. Over time, more materials  […]

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COASTAL DEPOSITION

Deposition occur along the coast due to the Constructive waves which have a more powerful swash than backwash, more materials are deposited than eroded on such coasts. when the coasts are sheltered from prevailing winds which protected from wave erosion and deposition of materials take place. Storm also subsidies, the large amount of materials eroded […]

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COASTAL TRANSPORT

The materials that are eroded from the coast are usually transported along the coast by waves and currents before they are deposited elsewhere. The Longshore  Drift When waves approach a coast at an  angle, the swash brings the sediment up onto the coast at the same angle. Due to friction and the pull of gravity, […]

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