Archive:Basic coastal geography - Revision history

wikademia>Wikademia: moved Basic Coastal Geography to Archive:Basic coastal geography

2009-06-12T16:19:18Z

moved Basic Coastal Geography to Archive:Basic coastal geography

← Older revision	Revision as of 16:19, 12 June 2009
(No difference)

wikademia>Wikademia: moved Coastal geography to Basic Coastal Geography

2009-06-08T18:32:02Z

moved Coastal geography to Basic Coastal Geography

← Older revision	Revision as of 18:32, 8 June 2009
(No difference)

wikademia>Wikademia: 83 revisions

2009-06-08T18:31:16Z

83 revisions

← Older revision	Revision as of 18:31, 8 June 2009
(No difference)

58.169.209.130: /* Wave action and longshore drift */

2009-05-27T08:53:40Z

Wave action and longshore drift

← Older revision		Revision as of 08:53, 27 May 2009
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	[[Image:RhossiliBeach.jpg\|175px\|thumb\|right\|Rhossili in Wales is a low energy shoreline.]]		[[Image:RhossiliBeach.jpg\|175px\|thumb\|right\|Rhossili in Wales is a low energy shoreline.]]
	Probably the most important effect is [[longshore drift]] (LSD), the process by which sediment is continuously moved along beaches by wave action. LSD occurs because waves hit the shore at an angle, pick up sediment (sand) on the shore and carry it down the beach at an angle (this is called swash). Due to gravity, the water then falls back perpendicular to the beach, dropping its sediment as it loses energy (this is called backwash). The sediment is then picked up by the next wave and pushed slightly further down the beach, resulting in a continual movement of sediment in one direction. This is the reason why long strips of coast are covered in sediment, not just the areas around river mouths, which are the main sources of beach sediment. LSD is reliant on a constant supply of sediment from rivers and if sediment supply is stopped or sediment falls into a submarine canals at any point along a beach, this can lead to bare beaches further along the shore.		Probably the most important effect is [[longshore drift]] (LSD)(Also known as Littoral Drift), the process by which sediment is continuously moved along beaches by wave action. LSD occurs because waves hit the shore at an angle, pick up sediment (sand) on the shore and carry it down the beach at an angle (this is called swash). Due to gravity, the water then falls back perpendicular to the beach, dropping its sediment as it loses energy (this is called backwash). The sediment is then picked up by the next wave and pushed slightly further down the beach, resulting in a continual movement of sediment in one direction. This is the reason why long strips of coast are covered in sediment, not just the areas around river mouths, which are the main sources of beach sediment. LSD is reliant on a constant supply of sediment from rivers and if sediment supply is stopped or sediment falls into a submarine canals at any point along a beach, this can lead to bare beaches further along the shore.

	LSD helps create many landforms including [[barriers]], bay beaches and [[Spit (landform)\|spits]]. In general LSD action serves to straighten the coast because the creation of barriers cuts off [[Headlands and bays\|bays]] from the sea while sediment usually builds up in bays because the waves there are weaker (due to wave refraction), while sediment is carried away from the exposed [[Headlands and bays\|headlands]]. The lack of sediment on headlands removes the protection of waves from them and makes them more vulnerable to weathering while the gathering of sediment in bays (where longshore drift is unable to remove it) protects the bays from further erosion and makes them pleasant [[recreational beaches]].		LSD helps create many landforms including [[barriers]], bay beaches and [[Spit (landform)\|spits]]. In general LSD action serves to straighten the coast because the creation of barriers cuts off [[Headlands and bays\|bays]] from the sea while sediment usually builds up in bays because the waves there are weaker (due to wave refraction), while sediment is carried away from the exposed [[Headlands and bays\|headlands]]. The lack of sediment on headlands removes the protection of waves from them and makes them more vulnerable to weathering while the gathering of sediment in bays (where longshore drift is unable to remove it) protects the bays from further erosion and makes them pleasant [[recreational beaches]].

wikademia>Keith D: Reverted edits by 67.172.223.222 (talk) to last version by Shadowjams

2009-05-12T23:35:31Z

Reverted edits by 67.172.223.222 (talk) to last version by Shadowjams

← Older revision		Revision as of 23:35, 12 May 2009
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	Slowly over time sediment simply builds on this area, extending the spit outwards, forming a barrier of sand. Once in a while, the wind direction will change and come from the other direction. During this period the sediment will be pushed along in the other direction. The spit will start to grow backwards, forming a 'hook'. After this time the spit will grow again in the original direction. Eventually the spit will not be able to grow any further because it is no longer sufficiently sheltered from erosion by waves, or because the estuary current prevents sediment resting. Usually in the salty but calm waters behind the spit there will form a salt marshland. Spits often form around the breakwater of artificial harbours requiring dredging.		Slowly over time sediment simply builds on this area, extending the spit outwards, forming a barrier of sand. Once in a while, the wind direction will change and come from the other direction. During this period the sediment will be pushed along in the other direction. The spit will start to grow backwards, forming a 'hook'. After this time the spit will grow again in the original direction. Eventually the spit will not be able to grow any further because it is no longer sufficiently sheltered from erosion by waves, or because the estuary current prevents sediment resting. Usually in the salty but calm waters behind the spit there will form a salt marshland. Spits often form around the breakwater of artificial harbours requiring dredging.

	Occasionally, if there is no estuary then it is possible for the spit to grow across to the other side of the bay and form what is called a bar, or barrier. Barriers come in several varieties, but all form in a manner similar to spits. They usually enclose a bay to form a lagoon. They can join two headlands or join a headland to the mainland. When an island is joined to the mainland with a bar or barrier it is known as a tombolo. This usually occurs due to wave refraction, but can also be caused by isostatic change, a change in the level of the land (e.g. [[Chesil Beach]]). An example of this is along the [[Holderness]] coastline.~~ppl this is a rip okay!!!!!!!!!!!!!!!!!~~		Occasionally, if there is no estuary then it is possible for the spit to grow across to the other side of the bay and form what is called a bar, or barrier. Barriers come in several varieties, but all form in a manner similar to spits. They usually enclose a bay to form a lagoon. They can join two headlands or join a headland to the mainland. When an island is joined to the mainland with a bar or barrier it is known as a tombolo. This usually occurs due to wave refraction, but can also be caused by isostatic change, a change in the level of the land (e.g. [[Chesil Beach]]). An example of this is along the [[Holderness]] coastline.

	==See also==		==See also==

67.172.223.222: /* Coastal landforms */

2009-05-11T20:10:03Z

Coastal landforms

← Older revision		Revision as of 20:10, 11 May 2009
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	Slowly over time sediment simply builds on this area, extending the spit outwards, forming a barrier of sand. Once in a while, the wind direction will change and come from the other direction. During this period the sediment will be pushed along in the other direction. The spit will start to grow backwards, forming a 'hook'. After this time the spit will grow again in the original direction. Eventually the spit will not be able to grow any further because it is no longer sufficiently sheltered from erosion by waves, or because the estuary current prevents sediment resting. Usually in the salty but calm waters behind the spit there will form a salt marshland. Spits often form around the breakwater of artificial harbours requiring dredging.		Slowly over time sediment simply builds on this area, extending the spit outwards, forming a barrier of sand. Once in a while, the wind direction will change and come from the other direction. During this period the sediment will be pushed along in the other direction. The spit will start to grow backwards, forming a 'hook'. After this time the spit will grow again in the original direction. Eventually the spit will not be able to grow any further because it is no longer sufficiently sheltered from erosion by waves, or because the estuary current prevents sediment resting. Usually in the salty but calm waters behind the spit there will form a salt marshland. Spits often form around the breakwater of artificial harbours requiring dredging.

	Occasionally, if there is no estuary then it is possible for the spit to grow across to the other side of the bay and form what is called a bar, or barrier. Barriers come in several varieties, but all form in a manner similar to spits. They usually enclose a bay to form a lagoon. They can join two headlands or join a headland to the mainland. When an island is joined to the mainland with a bar or barrier it is known as a tombolo. This usually occurs due to wave refraction, but can also be caused by isostatic change, a change in the level of the land (e.g. [[Chesil Beach]]). An example of this is along the [[Holderness]] coastline.		Occasionally, if there is no estuary then it is possible for the spit to grow across to the other side of the bay and form what is called a bar, or barrier. Barriers come in several varieties, but all form in a manner similar to spits. They usually enclose a bay to form a lagoon. They can join two headlands or join a headland to the mainland. When an island is joined to the mainland with a bar or barrier it is known as a tombolo. This usually occurs due to wave refraction, but can also be caused by isostatic change, a change in the level of the land (e.g. [[Chesil Beach]]). An example of this is along the [[Holderness]] coastline.ppl this is a rip okay!!!!!!!!!!!!!!!!!

	==See also==		==See also==

wikademia>Shadowjams at 06:30, 10 April 2009

2009-04-10T06:30:11Z

← Older revision		Revision as of 06:30, 10 April 2009
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	{{More footnotes\|date=April 2009}}		{{More footnotes\|date=April 2009}}
	'''Coastal geography''' is the study of the dynamic interface between the ocean and the land, incorporating both the [[physical geography]] (i.e coastal [[geomorphology]], [[geology]] and [[oceanography]]) and the [[human geography]] ([[sociology]] and [[history]]) of the coast. It involves an understanding of coastal weathering processes, particularly wave action, sediment movement and weather, and also the ways in which humans interact with the coast.		'''Coastal geography''' is the study of the dynamic interface between the ocean and the land, incorporating both the [[physical geography]] (i.e coastal [[geomorphology]], [[geology]] and [[oceanography]]) and the [[human geography]] ([[sociology]] and [[history]]) of the coast. It involves an understanding of coastal weathering processes, particularly wave action, sediment movement and weather, and also the ways in which humans interact with the coast.
	Coastal geography is that branch of geography,incorporating physical and human geography,which deals with the study of the dynamic interface between ocean and land.		Coastal geography is that branch of geography, incorporating physical and human geography,which deals with the study of the dynamic interface between ocean and land.

	==Wave action and longshore drift==		==Wave action and longshore drift==

wikademia>SmackBot: Date maintenance tags and general fixes

2009-04-07T03:34:08Z

Date maintenance tags and general fixes

← Older revision		Revision as of 03:34, 7 April 2009
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	{{~~morefootnotes~~}}		{{More footnotes\|date=April 2009}}
	'''Coastal geography''' is the study of the dynamic interface between the ocean and the land, incorporating both the [[physical geography]] (i.e coastal [[geomorphology]], [[geology]] and [[oceanography]]) and the [[human geography]] ([[sociology]] and [[history]]) of the coast. It involves an understanding of coastal weathering processes, particularly wave action, sediment movement and weather, and also the ways in which humans interact with the coast.		'''Coastal geography''' is the study of the dynamic interface between the ocean and the land, incorporating both the [[physical geography]] (i.e coastal [[geomorphology]], [[geology]] and [[oceanography]]) and the [[human geography]] ([[sociology]] and [[history]]) of the coast. It involves an understanding of coastal weathering processes, particularly wave action, sediment movement and weather, and also the ways in which humans interact with the coast.
	Coastal geography is that branch of geography,incorporating physical and human geography,which deals with the study of the dynamic interface between ocean and land.		Coastal geography is that branch of geography,incorporating physical and human geography,which deals with the study of the dynamic interface between ocean and land.
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	==Land level changes (Isostatic Change)==		==Land level changes (Isostatic Change)==
	This is found in the U.K. as above the line from the Wash to the Seven estuary, the land was covered in ice sheets during the last ice age. The weight of the ice caused northeast Scotland to sink, displacing the southeast and forcing it to rise. As the ice sheets receded the reverse process happened, as the land was released from the weight. At current estimates the southeast is sinking at a rate of about ~~2mm~~ per year, with northeast Scotland rising by the same amount.		This is found in the U.K. as above the line from the Wash to the Seven estuary, the land was covered in ice sheets during the last ice age. The weight of the ice caused northeast Scotland to sink, displacing the southeast and forcing it to rise. As the ice sheets receded the reverse process happened, as the land was released from the weight. At current estimates the southeast is sinking at a rate of about 2 mm per year, with northeast Scotland rising by the same amount.

	==Coastal landforms==		==Coastal landforms==
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	*[[Beach evolution]]		*[[Beach evolution]]

	==External ~~Links~~==		==External links==
	* [http://www.coastalresearch.nl/glossary#description Glossary of terms used in coastal geography]		* [http://www.coastalresearch.nl/glossary#description Glossary of terms used in coastal geography]
	* [http://www.sciencedictionary.org/coastal-science#description Coastal science terms and definitions ]		* [http://www.sciencedictionary.org/coastal-science#description Coastal science terms and definitions ]

wikademia>TXiKiBoT: robot Adding: hr:Litoralna geografija

2009-03-26T21:11:04Z

robot Adding: hr:Litoralna geografija

← Older revision		Revision as of 21:11, 26 March 2009
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	[[es:Geografía litoral]]		[[es:Geografía litoral]]
			[[hr:Litoralna geografija]]
	[[it:Geografia litorale]]		[[it:Geografia litorale]]

wikademia>Otisjimmy1: Reverted 2 edits by ClueBot and 121.217.194.153 to an older version by 121.217.194.153 (HG)

2009-03-24T07:50:26Z

Reverted 2 edits by ClueBot and 121.217.194.153 to an older version by 121.217.194.153 (HG)

← Older revision		Revision as of 07:50, 24 March 2009
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	{{morefootnotes}}		{{morefootnotes}}
	'''Coastal geography''' is the study of the dynamic interface between the ocean and the land, incorporating both the [[physical geography]] (i.e coastal [[geomorphology]], [[geology]] and [[oceanography]]) and the [[human geography]] ([[sociology]] and [[history]]) of the coast. It involves an understanding of coastal weathering processes, particularly wave action, sediment movement and weather, and also the ways in which humans interact with the coast.		'''Coastal geography''' is the study of the dynamic interface between the ocean and the land, incorporating both the [[physical geography]] (i.e coastal [[geomorphology]], [[geology]] and [[oceanography]]) and the [[human geography]] ([[sociology]] and [[history]]) of the coast. It involves an understanding of coastal weathering processes, particularly wave action, sediment movement and weather, and also the ways in which humans interact with the coast.
	Coastal geography is that branch of geography,incorporating physical and human geography,which deals with the study of the dynamic interface between ocean and land.		Coastal geography is that branch of geography,incorporating physical and human geography,which deals with the study of the dynamic interface between ocean and land.