A ria (;
gl, ría) is a coastal
inlet
An inlet is a (usually long and narrow) indentation of a shoreline, such as a small arm, bay, sound, fjord, lagoon or marsh, that leads to an enclosed larger body of water such as a lake, estuary, gulf or marginal sea.
Overview
In marine ...
formed by the partial submergence of an unglaciated
river valley
A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams ...
. It is a drowned river valley that remains open to the sea.
Definitions
Typically rias have a
dendritic
Dendrite derives from the Greek word "dendron" meaning ( "tree-like"), and may refer to:
Biology
*Dendrite, a branched projection of a neuron
* Dendrite (non-neuronal), branching projections of certain skin cells and immune cells
Physical
*Dendr ...
, treelike outline although they can be straight and without significant branches. This pattern is inherited from the dendritic drainage pattern of the flooded river valley. The drowning of river valleys along a stretch of coast and formation of rias results in an extremely irregular and indented coastline. Often, there are naturally occurring islands, which are summits of partly submerged, pre-existing hill peaks. (Islands may also be artificial, such as those constructed for the
Chesapeake Bay Bridge-Tunnel.)
A ria coast is a coastline having several parallel rias separated by prominent ridges, extending a distance inland.
[Goudie, A. (2004) ''Encyclopedia of Geomorphology.'' Routledge. London, England.][Bird, E.C.F. (2008) ''Coastal Geomorphology: An Introduction'', 2nd ed. John Wiley and Sons Ltd. West Sussex, England.] The sea level change that caused the submergence of a river valley may be either
eustatic (where global sea levels rise), or
isostatic (where the local land sinks). The result is often a very large
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 environm ...
at the mouth of a relatively insignificant river (or else sediments would quickly fill the ria). The
Kingsbridge Estuary in
Devon
Devon ( , historically known as Devonshire , ) is a ceremonial and non-metropolitan county in South West England. The most populous settlement in Devon is the city of Plymouth, followed by Devon's county town, the city of Exeter. Devo ...
, England, is an extreme example of a ria forming an estuary disproportionate to the size of its river; no significant river flows into it at all, only a number of small streams.
The word ''
ria'' comes from
Galician ''
ría'', which is related to Spanish and Galician ''
río'' and Portuguese ''
rio
Rio or Río is the Portuguese, Spanish, Italian, and Maltese word for "river". When spoken on its own, the word often means Rio de Janeiro, a major city in Brazil.
Rio or Río may also refer to:
Geography Brazil
* Rio de Janeiro
* Rio do Sul, a ...
'' (river). Rias are present all along the
Galicia
Galicia may refer to:
Geographic regions
* Galicia (Spain), a region and autonomous community of northwestern Spain
** Gallaecia, a Roman province
** The post-Roman Kingdom of the Suebi, also called the Kingdom of Gallaecia
** The medieval King ...
n coast in
Spain
, image_flag = Bandera de España.svg
, image_coat = Escudo de España (mazonado).svg
, national_motto = '' Plus ultra'' (Latin)(English: "Further Beyond")
, national_anthem = (English: "Royal March")
, ...
. As originally defined, the term was restricted to drowned river valleys cut parallel to the structure of the
country rock
Country rock is a genre of music which fuses rock and country. It was developed by rock musicians who began to record country-flavored records in the late 1960s and early 1970s. These musicians recorded rock records using country themes, vocal ...
that was at right angles to the coastline. However the definition of ria was later expanded to other flooded river valleys regardless of the structure of the country rock.
For a time European geomorphologists
considered rias to include any broad estuarine river mouth, including
fjord
In physical geography, a fjord or fiord () is a long, narrow inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Alaska, Antarctica, British Columbia, Chile, Denmark, Germany, Greenland, the Faroe Islands, Icel ...
s. These are long narrow
inlet
An inlet is a (usually long and narrow) indentation of a shoreline, such as a small arm, bay, sound, fjord, lagoon or marsh, that leads to an enclosed larger body of water such as a lake, estuary, gulf or marginal sea.
Overview
In marine ...
s with steep sides or cliffs, created in a valley carved by
glacial activity. In the 21st century, however, the preferred usage of ''ria'' by geologists and geomorphologists is to refer solely to drowned unglaciated river valleys. It therefore excludes fjords by definition, since fjords are products of glaciation.
Locations
Europe
* Portugal: has no ''rias'' as such: the
Ria de Aveiro in
Aveiro, and
Ria Formosa in Eastern
Algarve
The Algarve (, , ; from ) is the southernmost NUTS II region of continental Portugal. It has an area of with 467,495 permanent inhabitants and incorporates 16 municipalities ( ''concelhos'' or ''municípios'' in Portuguese).
The region has it ...
are actually
lagoon
A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into '' coastal lagoons'' (or ''barrier lagoons ...
s.
* Atlantic coast of Spain
**
Galicia
Galicia may refer to:
Geographic regions
* Galicia (Spain), a region and autonomous community of northwestern Spain
** Gallaecia, a Roman province
** The post-Roman Kingdom of the Suebi, also called the Kingdom of Gallaecia
** The medieval King ...
:
*** The
Rías Baixas, including the Ria of
Vigo
Vigo ( , , , ) is a city and municipality in the province of Pontevedra, within the autonomous community of Galicia, Spain. Located in the northwest of the Iberian Peninsula, it sits on the southern shore of an inlet of the Atlantic Ocean, the ...
, Ria of
Pontevedra,
Ría de Arousa
The ''Ría de Arousa'' is a ria, a saline estuary, that forms a firth situated on Galicia, Spain. It is one of the five ''Rías Baixas''. The Ría de Arousa estuary is the largest of the estuaries of Galicia. It is part of the Rias Baixas and is ...
, Ria of
Muros and
Noia, Ria of
Corcubion,
Cee and Ría de
Aldán.
*** The
Rías Altas
Rías Altas (also called "Upper Rias") is the northernmost of three sections of '' A Costa do Marisco'' (the Seafood Coast) in Galicia, Spain. It extends from the port of Ribadeo to Santa Cruz.
The Upper Rias refers to the coast of the norther ...
, including the Ria of
Corunna, Ria of
Ares
Ares (; grc, Ἄρης, ''Árēs'' ) is the Greek god of war and courage. He is one of the Twelve Olympians, and the son of Zeus and Hera. The Greeks were ambivalent towards him. He embodies the physical valor necessary for success in war ...
and
Betanzos, Ria of
Cedeira, Ria of
O Barqueiro
O Barqueiro (also Port of El Barquero) is a parish and a port belonging to the city council of Mañón in Ferrolterra in North-western Spain in the province of A Coruña, in the autonomous community of Galicia.
Industry
* Important fishin ...
,
Ria of Ferrol, Ria of
Ortigueira
Ortigueira is a seaport and municipality in the province of A Coruña the autonomous community of Galicia in northwestern Spain. It belongs to the comarca of Ortegal. It is located on the northern slope of the Serra da Faladoira, the river Me ...
, Ria of
Viveiro
Viveiro () is a town and municipality in the province of Lugo, in the northwestern Galician autonomous community of Spain. It borders on the Cantabric Sea, to the west of Xove and to the east of O Vicedo. It has a residential population of o ...
, Ria of
Foz
Foz () is a town and municipality in the A Mariña Central comarca in the Galician province of Lugo. It has been historically linked to the Ancient Province of Mondoñedo and also linked to the arrival of Briton immigrants during the Dark Ages ...
and Ria of
Ribadeo.
**
Asturias
Asturias (, ; ast, Asturies ), officially the Principality of Asturias ( es, Principado de Asturias; ast, Principáu d'Asturies; Galician-Asturian: ''Principao d'Asturias''), is an autonomous community in northwest Spain.
It is coextensiv ...
: Ria of
Avilés
Avilés (; ) is a town in Asturias, Spain. Avilés is, along with Oviedo and Gijón, one of the main cities in the Principality of Asturias.
The town occupies the flattest land in the municipality, partially in a land that belonged to the sea, s ...
, Ria of
Ribadeo, Ria of
Navia, Ria of
Villaviciosa, Ria of
Ribadesella
Ribadesella (Asturian: Ribeseya) is a small municipality in the Autonomous Community of the Principality of Asturias, Spain. Known for its location on the Cantabrian Sea, at the outlet of the River Sella, Ribadesella is a town that forms part ...
, Ria of
Llanes
Llanes (the ''Concejo de Llanes'', ''Conceyu de Llanes'' in Asturian language) is a municipality of the province of Asturias, in northern Spain. Stretching for about 30 km along the coast at the extreme east of the province, Llanes is bound ...
, Ria of Tina Mayor.
**
Cantabria
Cantabria (, also , , Cantabrian: ) is an autonomous community in northern Spain with Santander as its capital city. It is called a ''comunidad histórica'', a historic community, in its current Statute of Autonomy. It is bordered on the east ...
: Ria of Tina Mayor, Ria of Tina Menor, Ría de
San Vicente de la Barquera
San Vicente de la Barquera is a municipality of Cantabria
Cantabria (, also , , Cantabrian: ) is an autonomous community in northern Spain with Santander as its capital city. It is called a ''comunidad histórica'', a historic community, ...
, Ría of la Rabia, Ría of San Martín de la Arena, Ría of
Mogro, Ría of
Solía, Ría of Carmen, Ría of
Boo, Ría of Tijero, Ría of Cubas, Ría de Ajo, Ría of
Cabo Quejo, Ría of Treto, Ría of Oriñón.
**
Basque Country:
Ria of Bilbao, mouth of the rivers
Nervión
, name_etymology =
, image = Nervion.jpg
, image_size = 300px
, image_caption = River Nervion with Zubizuri footbridge.
, map =
, map_size =
, map_caption =
, pushpin_map ...
,
Ibaizabal, and
Cadagua
The Cadagua or Kadagua River drains the Biscayan area of Encartaciones (), from the Castilian valley of Mena to Barakaldo and Bilbao, where it forms the border between these municipalities and ends at the Estuary of Bilbao. Another important tow ...
.
**
Andalusia
Andalusia (, ; es, Andalucía ) is the southernmost autonomous community in Peninsular Spain. It is the most populous and the second-largest autonomous community in the country. It is officially recognised as a "historical nationality". The ...
: Ria of Carreras, Ria of
Huelva
Huelva (, ) is a city in southwestern Spain, the capital of the province of Huelva in the autonomous community of Andalusia. It is between two short rias though has an outlying spur including nature reserve on the Gulf of Cádiz coast. The ria ...
at the mouth of the rivers
Odiel and
Tinto.
* Brittany: The rias in northern Brittany are called ''Abers'': ''
Aber Wrac'h
The Aber Wrac'h is a small village and port located on the river Wrac'h in the commune of Landéda in the department of Finistère in France, located in Brittany.
The Wrac'h's source is in Trémaouézan. It travels through Ploudaniel, Le Folg ...
'' (), ''Aber Benoît'' (), ''Aber Ildut'' () etc. The
Roadstead of Brest also includes several rias.
* Ireland:
Bantry Bay
Bantry Bay ( ga, Cuan Baoi / Inbhear na mBárc / Bádh Bheanntraighe) is a bay located in County Cork, Ireland. The bay runs approximately from northeast to southwest into the Atlantic Ocean. It is approximately 3-to-4 km (1.8-to-2.5 mil ...
, on the southwest coast of Ireland, is an example of an Irish ria.
* Wales:
Milford Haven Waterway in
Pembrokeshire
Pembrokeshire ( ; cy, Sir Benfro ) is a county in the south-west of Wales. It is bordered by Carmarthenshire to the east, Ceredigion to the northeast, and the rest by sea. The county is home to Pembrokeshire Coast National Park. The Park oc ...
is a ria.
* England: The south coast of England is a
submergent coastline which contains many rias, including
Southampton Water,
Poole Harbour
Poole Harbour is a large natural harbour in Dorset, southern England, with the town of Poole on its shores. The harbour is a drowned valley ( ria) formed at the end of the last ice age and is the estuary of several rivers, the largest bei ...
, the estuary of the
River Medina on the Isle of Wight, the estuaries of the
Exe
Exe or EXE may refer to:
* .exe, a file extension
* exe., abbreviation for executive
Places
* River Exe, in England
* Exe Estuary, in England
* Exe Island, in Exeter, England
Transportation and vehicles
* Exe (locomotive), a British locomotiv ...
,
Teign
Teigne (also : Teign, Tègne, Teeñ, Tin or Tañ in Wolof language) was the title of the monarch of the pre-colonial Kingdom of Baol, now part of present-day Senegal.
In Wolof, "Teigne" means the support that is placed on the head to carry so ...
and
Dart
Dart or DART may refer to:
* Dart, the equipment in the game of darts
Arts, entertainment and media
* Dart (comics), an Image Comics superhero
* Dart, a character from ''G.I. Joe''
* Dart, a ''Thomas & Friends'' railway engine character
* Da ...
, then
Kingsbridge Estuary,
Plymouth Sound in
Devon
Devon ( , historically known as Devonshire , ) is a ceremonial and non-metropolitan county in South West England. The most populous settlement in Devon is the city of Plymouth, followed by Devon's county town, the city of Exeter. Devo ...
, and the estuaries of the
River Fowey
The River Fowey ( ; kw, Fowi) is a river in Cornwall, England, United Kingdom.
It rises at Fowey Well (originally kw, Fenten Fowi, meaning ''spring of the river Fowey'') about north-west of Brown Willy on Bodmin Moor, not far from one of ...
,
River Fal and
Helford River
The Helford River ( kw, Dowr Mahonyer) is a ria (flooded river valley) in Cornwall, England, fed by small streams into its many creeks. There are seven creeks on the Helford; from west to east these are Ponsontuel Creek, Mawgan Creek, Polpenwit ...
in
Cornwall
Cornwall (; kw, Kernow ) is a Historic counties of England, historic county and Ceremonial counties of England, ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people ...
. On the north coast is the
River Camel and the
River Taw
The River Taw () rises at Taw Head, a spring on the central northern flanks of Dartmoor, crosses North Devon and at the town of Barnstaple, formerly a significant port, empties into Bideford Bay in the Bristol Channel, having formed a large ...
. In
Essex
Essex () is a Ceremonial counties of England, county in the East of England. One of the home counties, it borders Suffolk and Cambridgeshire to the north, the North Sea to the east, Hertfordshire to the west, Kent across the estuary of the Riv ...
are the
River Blackwater and
River Crouch.
* Croatia:
Lim,
Rijeka Dubrovačka
Rijeka Dubrovačka (Italian: ''Val d'Ombla'') is a ria (coastal inlet) to the north of Dubrovnik, Croatia, on the coast of the Adriatic Sea
The Adriatic Sea () is a body of water separating the Italian Peninsula from the Balkan Peninsula. The ...
* Montenegro: The
Bay of Kotor
The Bay of Kotor ( Montenegrin and Serbian: , Italian: ), also known as the Boka, is a winding bay of the Adriatic Sea in southwestern Montenegro and the region of Montenegro concentrated around the bay. It is also the southernmost part of the hi ...
* Italy: The
Fiordo di Furore
Furore is a town and '' comune'' in the province of Salerno in the Campania region of south-western Italy. Furore is located on the Amalfi Coast.
Geography
The municipality of Furore expands from sea level, where there is the hamlet of Fiordo d ...
on the
Amalfi Coast
The Amalfi Coast ( it, Costiera amalfitana) is a stretch of coastline in southern Italy overlooking the Tyrrhenian Sea and the Gulf of Salerno. It is located south of the Sorrentine Peninsula and north of the Cilentan Coast.
Celebrated worldw ...
in
Campania
(man), it, Campana (woman)
, population_note =
, population_blank1_title =
, population_blank1 =
, demographics_type1 =
, demographics1_footnotes =
, demographics1_title1 =
, demographics1_info1 =
, demog ...
is a ria, despite its name.
* Malta:
Grand Harbour
The Grand Harbour ( mt, il-Port il-Kbir; it, Porto Grande), also known as the Port of Valletta, is a natural harbour on the island of Malta. It has been substantially modified over the years with extensive docks ( Malta Dockyard), wharves, a ...
and
Marsamxett Harbour
Marsamxett Harbour (), historically also referred to as Marsamuscetto, is a natural harbour on the island of Malta. It is located to the north of the larger Grand Harbour. The harbour is generally more dedicated to leisure use than the Grand H ...
Africa
*
Kenya
)
, national_anthem = " Ee Mungu Nguvu Yetu"()
, image_map =
, map_caption =
, image_map2 =
, capital = Nairobi
, coordinates =
, largest_city = Nairobi
, ...
:
Kilindini Harbour
Kilindini Harbour is a large, natural deep-water inlet extending inland from Mombasa, Kenya. It is at its deepest center, although the controlling depth is the outer channel in the port approaches with a dredged depth of . It serves as the harbo ...
, which is a deep channel between Mombasa island and South Coast mainland, is a ria.
Asia
*
Sanriku Coast: North Japan, east coast of Honshū Island (main island). Sendai city, Miyagi Prefecture and Iwate Prefecture are included.
*
Ago Coast in
Shima (Mie Prefecture) is a Ria coast, well known for its pearls.
* Coasts on western, southern sides of the
Korean Peninsula
Korea ( ko, 한국, or , ) is a peninsular region in East Asia. Since 1945, it has been divided at or near the 38th parallel, with North Korea (Democratic People's Republic of Korea) comprising its northern half and South Korea (Republic ...
: Rias formed by sea level rising after
Ice Age
An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and gre ...
.
* The Chinese east coast, from the
Guangdong province
Guangdong (, ), alternatively romanized as Canton or Kwangtung, is a coastal province in South China on the north shore of the South China Sea. The capital of the province is Guangzhou. With a population of 126.01 million (as of 2020) ...
(
Hong Kong
Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China (abbr. Hong Kong SAR or HKSAR), is a List of cities in China, city and Special administrative regions of China, special ...
coastlines included) to
Shanghai
Shanghai (; , , Standard Chinese, Standard Mandarin pronunciation: ) is one of the four Direct-administered municipalities of China, direct-administered municipalities of the China, People's Republic of China (PRC). The city is located on the ...
.
* The
Musandam Peninsula in
Oman
Oman ( ; ar, عُمَان ' ), officially the Sultanate of Oman ( ar, سلْطنةُ عُمان ), is an Arabian country located in southwestern Asia. It is situated on the southeastern coast of the Arabian Peninsula, and spans the mouth of ...
, comprising the southern shore of the
Strait of Hormuz
The Strait of Hormuz ( fa, تنگه هرمز ''Tangeh-ye Hormoz'' ar, مَضيق هُرمُز ''Maḍīq Hurmuz'') is a strait between the Persian Gulf and the Gulf of Oman. It provides the only sea passage from the Persian Gulf to the o ...
.
Oceania
* Papua New Guinea: Rias formed by eroded volcanic lava flow are found all around the town of
Tufi at Cape Nelson, in Papua New Guinea's
Oro Province
Oro Province, formerly (and officially still) Northern Province, is a coastal province of Papua New Guinea. The provincial capital is Popondetta. The province covers 22,800 km2, and has 176,206 inhabitants (2011 census). The province shares l ...
.
* Australia: The east coast of Australia features several rias around
Sydney
Sydney ( ) is the capital city of the state of New South Wales, and the most populous city in both Australia and Oceania. Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about towards the Blue Mounta ...
, including
Georges River
The Georges River, also known as Tucoerah River, is an intermediate tide-dominated drowned valley estuary, located to the south and west of Sydney, New South Wales, Australia.
The river travels for approximately in a north and then easterly ...
,
Port Hacking
Port Hacking Estuary ( Aboriginal Tharawal language: ''Deeban''), an open youthful tide dominated, drowned valley estuary, is located in southern Sydney, New South Wales, Australia approximately south of Sydney central business district. Po ...
, and
Port Jackson
Port Jackson, consisting of the waters of Sydney Harbour, Middle Harbour, North Harbour and the Lane Cove and Parramatta Rivers, is the ria or natural harbour of Sydney, New South Wales, Australia. The harbour is an inlet of the Tasman S ...
, which includes Sydney Harbour. There are many examples in
Western Australia
Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to t ...
, including the
Swan River around Perth and several rivers in the west
Kimberley region.
* New Zealand: Rias of various scales abound on the eastern shores of the upper
North Island
The North Island, also officially named Te Ika-a-Māui, is one of the two main islands of New Zealand, separated from the larger but much less populous South Island by the Cook Strait. The island's area is , making it the world's 14th-larges ...
. On the west coast, in contrast, they are fewer but larger.
Kaipara Harbour is the country's largest, and the
Hokianga Harbour, further north, is of historical significance to the native
Māori people
The Māori (, ) are the indigenous Polynesian people of mainland New Zealand (). Māori originated with settlers from East Polynesia, who arrived in New Zealand in several waves of canoe voyages between roughly 1320 and 1350. Over severa ...
. The
Marlborough Sounds
The Marlborough Sounds are an extensive network of sea-drowned valleys at the northern end of the South Island of New Zealand. The Marlborough Sounds were created by a combination of land subsidence and rising sea levels. According to Māori ...
at the northern tip of the
South Island
The South Island, also officially named , is the larger of the two major islands of New Zealand in surface area, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman ...
form a large network of rias.
*
Hawaii
Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only stat ...
:
Pearl Harbor
Pearl Harbor is an American lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. It was often visited by the Naval fleet of the United States, before it was acquired from the Hawaiian Kingdom by the U.S. with the signing of the ...
on
Oahu
Oahu () ( Hawaiian: ''Oʻahu'' ()), also known as "The Gathering Place", is the third-largest of the Hawaiian Islands. It is home to roughly one million people—over two-thirds of the population of the U.S. state of Hawaii. The island of O ...
is a ria, with the branches of West Loch, Middle Loch, East Loch, and Southeast Loch formed by the submerged drainages of Waikele, Waiau, Waimalu, and Hālawa streams respectively.
North America
* United States:
Narragansett Bay
Narragansett Bay is a bay and estuary on the north side of Rhode Island Sound covering , of which is in Rhode Island. The bay forms New England's largest estuary, which functions as an expansive natural harbor and includes a small archipelago. Sm ...
,
New York Harbor
New York Harbor is at the mouth of the Hudson River where it empties into New York Bay near the East River tidal estuary, and then into the Atlantic Ocean on the east coast of the United States. It is one of the largest natural harbors in ...
,
Delaware Bay
Delaware Bay is the estuary outlet of the Delaware River on the northeast seaboard of the United States. It is approximately in area, the bay's freshwater mixes for many miles with the saltwater of the Atlantic Ocean.
The bay is bordered inland ...
,
Indian River Bay, the
Chesapeake Bay
The Chesapeake Bay ( ) is the largest estuary in the United States. The Bay is located in the Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula (including the parts: the Eastern Shore of Maryland / ...
, and
Charleston Harbor
The Charleston Harbor is an inlet (8 sq mi/20.7 km²) of the Atlantic Ocean at Charleston, South Carolina. The inlet is formed by the junction of Ashley and Cooper rivers at . Morris and Sullivan's Islands shelter the entrance. Charleston ...
are rias on the
East Coast.
Willapa Bay and
Grays Harbor Grays Harbor is an estuarine bay located north of the mouth of the Columbia River, on the southwest Pacific coast of Washington state, in the United States of America. It is a ria, which formed at the end of the last ice age, when sea levels floo ...
in
Washington
Washington commonly refers to:
* Washington (state), United States
* Washington, D.C., the capital of the United States
** A metonym for the federal government of the United States
** Washington metropolitan area, the metropolitan area centered o ...
and
San Francisco Bay
San Francisco Bay is a large tidal estuary in the U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the big cities of San Francisco, San Jose, and Oakland.
San Francisco Bay drains water f ...
in
California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
on the
West Coast are also rias.
* Canada:
Charlottetown
Charlottetown is the capital and largest city of the Canadian province of Prince Edward Island, and the county seat of Queens County. Named after Queen Charlotte, Charlottetown was an unincorporated town until it was incorporated as a city in ...
Harbour,
Prince Edward Island
Prince Edward Island (PEI; ) is one of the thirteen provinces and territories of Canada. It is the smallest province in terms of land area and population, but the most densely populated. The island has several nicknames: "Garden of the Gulf", ...
South America
* Argentina:
Patagonia
Patagonia () refers to a geographical region that encompasses the southern end of South America, governed by Argentina and Chile. The region comprises the southern section of the Andes Mountains with lakes, fjords, temperate rainforests, and g ...
has the
Deseado ria, on the coast of
Santa Cruz Province, on the
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...
. Also, the "bay" that is
Bahía Blanca
Bahía Blanca (; English: White Bay) is a city in the southwest of the province of Buenos Aires, Argentina, by the Atlantic Ocean, and is the seat of government of the Bahía Blanca Partido. It had 301,572 inhabitants according to the . It is th ...
is a ría.
Consequences
The funnel-like shape of rias can amplify the effects of
tsunami
A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater exp ...
s, as demonstrated in the
seismicity of the Sanriku coast, most recently in the
2011 Tōhoku earthquake and tsunami
The occurred at 14:46 Japan Standard Time, JST (05:46 UTC) on 11 March. The Moment magnitude scale, magnitude 9.0–9.1 (M) Submarine earthquake, undersea megathrust earthquake had an epicenter in the Pacific Ocean, east of the Oshika Peni ...
.
See also
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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 environm ...
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Firth
Firth is a word in the English and Scots languages used to denote various coastal waters in the United Kingdom, predominantly within Scotland. In the Northern Isles, it more usually refers to a smaller inlet. It is linguistically cognate to ''f ...
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Loch
''Loch'' () is the Scottish Gaelic, Scots and Irish word for a lake or sea inlet. It is cognate with the Manx lough, Cornish logh, and one of the Welsh words for lake, llwch.
In English English and Hiberno-English, the anglicised spell ...
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Fjord
In physical geography, a fjord or fiord () is a long, narrow inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Alaska, Antarctica, British Columbia, Chile, Denmark, Germany, Greenland, the Faroe Islands, Icel ...
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List of waterways
References
Further reading
*Perillo, Gerardo, ''Geomorphology and Sedimentology of Estuaries'', Volume 53. pp. 17–47. Elsevier Science (1995)
*von Richthofen, F. ''Fuhrer fur Forschungsreisende ("Guide for Explorers")'', pp. 308–310. Berlin, Oppenheim (1886)
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Coastal and oceanic landforms
Galician words and phrases
Portuguese words and phrases