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estuary

An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environments. They are subject both to marine influences—such as tides, waves, and the influx of saline water—and to riverine influences—such as flows of fresh water and sediment. The mixing of sea water and fresh water provide high levels of nutrients both in the water column and in sediment, making estuaries among the most productive natural habitats in the world. Most existing estuaries formed during the Holocene epoch with the flooding of river-eroded or glacially scoured valleys when the sea level began to rise about 10,000–12,000 years ago. Estuaries are typically classified according to their geomorphological features or to water-circulation patterns. They can have many different names, such as bays, harbors, lagoons, inlets, or sounds, although some of these water bodies do not strictly meet the above definition of an estuary and may be fully saline. The banks of many estuaries are amongst the most heavily populated areas of the world, with about 60% of the world's population living along estuaries and the coast. As a result, many estuaries suffer degradation from a variety of factors including: sedimentation from soil erosion from deforestation, overgrazing, and other poor farming practices; overfishing; drainage and filling of wetlands; eutrophication due to excessive nutrients from sewage and animal wastes; pollutants including heavy metals, polychlorinated biphenyls, radionuclides and hydrocarbons from sewage inputs; and diking or damming for flood control or water diversion.
SUncheon Bay. Swamp. - Suncheon Bay. Ecological Park.
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SUncheon Bay. Swamp.

Added 2 months ago by Zeta

38

Australia. - Australia. Landscape.
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Australia.

Added 2 months ago by Zeta

39

seaside landscape - beach, sand, cliffs, ebb and flow
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seaside landscape

Added 3 months ago by sandra

85 1

Stinson Beach by the ocean. - Stinson Beach by the ocean.
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Stinson Beach by the ocean.

Added 3 months ago by Zeta

101

Baltic Sea. - Baltic Sea. Bird's-eye view.
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Baltic Sea.

Added 3 months ago by Zeta

38

masuria - Masuria from a bird's eye view
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masuria

Added 4 months ago by Ela

38

BAJKOWY VIEW - Vacation, vacation, rest, lake
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BAJKOWY VIEW

Added 4 months ago by Ada

52

Landscape - landscape almost like from mars
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Landscape

Added year ago by andi

93

City at night - view of a beautifully lit city
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City at night

Added year ago by andi

119

BERMUDYBERMUDY - BERMUDA BERMUDA BERMUDA
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BERMUDYBERMUDY

Added year ago by BERMUDY

85

ŁOTWAŁOTWA - ŁOTWAŁOTWAŁOTWAŁOTWA
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ŁOTWAŁOTWA

Added year ago by ŁOTWA

74

BOTSWANA - BOTSWANA BOTSWANA BOTSWANA
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BOTSWANA

Added year ago by BOTSWANA

29

wiślany krajobraz - Wisła,domy,lasy,droga,
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wiślany krajobraz

Added over a year ago by wieslawa

164

na Mazurach - półwysep,jezioro,dom,lasy
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na Mazurach

Added over a year ago by wieslawa

235

rzeka wśród zieleni - zieleń,natura,rzeka,woda
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rzeka wśród zieleni

Added over a year ago by wieslawa

127

Toruń z lotu ptaka - Wisła,most,miasto,domy
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Toruń z lotu ptaka

Added over a year ago by wieslawa

110

Mont-Saint-Michel - Mont-Saint-Michel, Dolna Normandia, Francja
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Mont-Saint-Michel

Added over a year ago by zamieścił EB

179

Irlandia - Donabate - Irlandia - Plaża w Donabate
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Irlandia - Donabate

Added over a year ago by Anabell

225

Mazury - cud natury - Krajobraz Mazur, urzekająco pięknie
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Mazury - cud natury

Added over a year ago by Justyna

549

Różowe jezioro Hillier - Słone Jezioro Hillier, leżące na wyspie Middle w Archipelagu Recherche, u południowych wybrzeży
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Różowe jezioro Hillier

Added over a year ago by Majeczka

308

Dopasuj fragment do obrazka - Ułóż obrazek z poszczególnych fragmentów krajobrazu
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Dopasuj fragment do obrazka

Added over a year ago by Lecka

170

Zielona Szkocja - Góry i jeziora nad zielenią
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Zielona Szkocja

Added over a year ago by Iwona

132

Lofoten Islands - Bridge to the village of Fredvang on Moskenes Island in the Lofoten Islands, Norway
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Lofoten Islands

Added over a year ago by Baldiun

126