Misplaced Pages

#882117

63-585: The Humber / ˈ h ʌ m b ər / is a large tidal estuary on the east coast of Northern England . It is formed at Trent Falls , Faxfleet , by the confluence of the tidal rivers Ouse and Trent . From there to the North Sea , it forms part of the boundary between the East Riding of Yorkshire on the north bank and North Lincolnshire on the south bank. Also known as the River Humber , it

126-573: A harsh environment for organisms. Sediment often settles in intertidal mudflats which are extremely difficult to colonize. No points of attachment exist for algae , so vegetation based habitat is not established. Sediment can also clog feeding and respiratory structures of species, and special adaptations exist within mudflat species to cope with this problem. Lastly, dissolved oxygen variation can cause problems for life forms. Nutrient-rich sediment from human-made sources can promote primary production life cycles, perhaps leading to eventual decay removing

189-529: A number of coastal water bodies such as coastal lagoons and brackish seas. A more comprehensive definition of an estuary is "a semi-enclosed body of water connected to the sea as far as the tidal limit or the salt intrusion limit and receiving freshwater runoff; however the freshwater inflow may not be perennial, the connection to the sea may be closed for part of the year and tidal influence may be negligible". This broad definition also includes fjords , lagoons , river mouths , and tidal creeks . An estuary

252-572: A quarter of the goods traffic handled in the Thames . There are numerous theories for how the hydronym of Humber is derived from Celtic or Pre-Celtic languages. For example, it may be a Brittonic formation containing -[a]mb-ṛ , a variant of the element *amb meaning "moisture", with the prefix *hu- meaning "good, well" (c.f. Welsh hy- , in Hywel , etc). The first element may also be *hū- , with connotations of "seethe, boil, soak", of which

315-619: A river in which Humber was drowned. The river, which was thereafter known as the Humber , marked the southern border of the Kingdom of Northumbria and is one of the main rivers of England . When Locrinus raided Humber's ships after his death, he found Humber's consort Estrildis , the daughter of the King of Germany there. Thus Humber's Huns were able to settle Britain with their Queen Estrildis eventually marrying Locrinus. The River Severn

378-408: A type of ecosystem in some estuaries that have been negatively impacted by eutrophication. Cordgrass vegetation dominates the salt marsh landscape. Excess nutrients allow the plants to grow at greater rates in above ground biomass, however less energy is allocated to the roots since nutrients is abundant. This leads to a lower biomass in the vegetation below ground which destabilizes the banks of

441-642: A variant forms the name of the adjoining River Hull . The estuary appears in some Latin sources as Abus (A name used by Edmund Spenser in The Faerie Queene ). This is possibly a Latinisation of the Celtic form Aber ( Welsh for river mouth or estuary) but is erroneously given as a name for both the Humber and The Ouse as one continuous watercourse. Both Abus and Aber may record an older Indo-European word for water or river, (as in

504-563: A well-mixed water column and the disappearance of the vertical salinity gradient . The freshwater-seawater boundary is eliminated due to the intense turbulent mixing and eddy effects . The lower reaches of Delaware Bay and the Raritan River in New Jersey are examples of vertically homogeneous estuaries. Inverse estuaries occur in dry climates where evaporation greatly exceeds the inflow of freshwater. A salinity maximum zone

567-436: A wholly marine embayment to any of the other estuary types. The most important variable characteristics of estuary water are the concentration of dissolved oxygen, salinity and sediment load. There is extreme spatial variability in salinity, with a range of near-zero at the tidal limit of tributary rivers to 3.4% at the estuary mouth. At any one point, the salinity will vary considerably over time and seasons, making it

630-477: A wide effect on the surrounding water bodies.  In turn, this can decrease fishing industry sales in one area and across the country. Production in 2016 from recreational and commercial fishing contributes billions of dollars to the United States' gross domestic product (GDP). A decrease in production within this industry can affect any of the 1.7 million people the fishing industry employs yearly across

693-455: Is a dynamic ecosystem having a connection to the open sea through which the sea water enters with the rhythm of the tides . The effects of tides on estuaries can show nonlinear effects on the movement of water which can have important impacts on the ecosystem and waterflow. The seawater entering the estuary is diluted by the fresh water flowing from rivers and streams. The pattern of dilution varies between different estuaries and depends on

SECTION 10

#1732765973883

756-637: Is also used by over-wintering birds, is a good breeding ground for bitterns , marsh harriers , little terns and avocets , and forms part of the Severn-Trent flyway , a route used by migratory birds to cross Great Britain . In 2019 the Yorkshire Wildlife Trust and the University of Hull re-introduced the river oyster into the Humber after a sixty-year absence. Tidal estuary Most existing estuaries formed during

819-513: Is derived from the Latin word aestuarium meaning tidal inlet of the sea, which in itself is derived from the term aestus , meaning tide. There have been many definitions proposed to describe an estuary. The most widely accepted definition is: "a semi-enclosed coastal body of water, which has a free connection with the open sea, and within which seawater is measurably diluted with freshwater derived from land drainage". However, this definition excludes

882-411: Is formed, and both riverine and oceanic water flow close to the surface towards this zone. This water is pushed downward and spreads along the bottom in both the seaward and landward direction. Examples of an inverse estuary are Spencer Gulf , South Australia, Saloum River and Casamance River , Senegal. Estuary type varies dramatically depending on freshwater input, and is capable of changing from

945-478: Is further upstream, a Napoleonic-era emplacement replaced in the early 20th century by Stallingborough Battery opposite Sunk Island . The Humber Bridge was the longest single-span suspension bridge in the world from its construction in 1981 until 1998. It is now the twelfth longest . Before the bridge was built, a series of paddle steamers operated from the Corporation Pier railway station at

1008-566: Is less restricted, and there is a slow but steady exchange of water between the estuary and the ocean. Fjord-type estuaries can be found along the coasts of Alaska , the Puget Sound region of western Washington state , British Columbia , eastern Canada, Greenland , Iceland , New Zealand, and Norway. These estuaries are formed by subsidence or land cut off from the ocean by land movement associated with faulting , volcanoes , and landslides . Inundation from eustatic sea-level rise during

1071-558: Is noted in the Domesday Book and in a charter of 1281. The ferry was recorded as still operating in 1856, into the railway era. The Humber was then one mile (1.6 km) across. Graham Boanas, a Hull man, is believed to be the first man to succeed in wading across the Humber since ancient Roman times. The feat in August 2005 was attempted to raise cash and awareness for the medical research charity, DebRA . He started his trek on

1134-724: Is now submerged beneath the North Sea . The Humber features regularly in medieval British literature. In the Welsh Triads , the Humber is (together with the Thames and the River Severn ) one of the three principal rivers of Britain, and is continually mentioned throughout the Brut y Brenhinedd as a boundary between the southern kingdom ( Lloegyr ) and various northern kingdoms. In Geoffrey of Monmouth 's 12th-century historically unreliable chronicle ( Historia Regum Britanniae ),

1197-737: Is the Colorado River Delta in Mexico, historically covered with marshlands and forests, but now essentially a salt flat. Humber the Hun Humber the Hun was a legendary king of so-called " Huns " who, according to Geoffrey of Monmouth 's pseudohistorical chronicle Historia Regum Britanniae , invaded the British Isles in about the 12th century BC from Scythia. His people successfully conquered Alba but he himself

1260-646: Is the whitefish species from the European Alps . Eutrophication reduced the oxygen levels in their habitats so greatly that whitefish eggs could not survive, causing local extinctions. However, some animals, such as carnivorous fish, tend to do well in nutrient-enriched environments and can benefit from eutrophication. This can be seen in populations of bass or pikes. Eutrophication can affect many marine habitats which can lead to economic consequences. The commercial fishing industry relies upon estuaries for approximately 68 percent of their catch by value because of

1323-655: Is tidal its entire length. Below Trent Falls, the Humber passes the junction with the Market Weighton Canal on the north shore, the confluence of the River Ancholme on the south shore; between North Ferriby and South Ferriby and under the Humber Bridge ; between Barton-upon-Humber on the south bank and Kingston upon Hull on the north bank (where the River Hull joins), then meets

SECTION 20

#1732765973883

1386-748: The Holocene Epoch has also contributed to the formation of these estuaries. There are only a small number of tectonically produced estuaries; one example is the San Francisco Bay , which was formed by the crustal movements of the San Andreas Fault system causing the inundation of the lower reaches of the Sacramento and San Joaquin rivers . In this type of estuary, river output greatly exceeds marine input and tidal effects have minor importance. Freshwater floats on top of

1449-473: 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

1512-610: The Mandovi estuary in Goa during the monsoon period. As tidal forcing increases, river output becomes less than the marine input. Here, current induced turbulence causes mixing of the whole water column such that salinity varies more longitudinally rather than vertically, leading to a moderately stratified condition. Examples include the Chesapeake Bay and Narragansett Bay . Tidal mixing forces exceed river output, resulting in

1575-640: The Mid-Atlantic coast, and Galveston Bay and Tampa Bay along the Gulf Coast . Bar-built estuaries are found in a place where the deposition of sediment has kept pace with rising sea levels so that the estuaries are shallow and separated from the sea by sand spits or barrier islands. They are relatively common in tropical and subtropical locations. These estuaries are semi-isolated from ocean waters by barrier beaches ( barrier islands and barrier spits ). Formation of barrier beaches partially encloses

1638-536: The North Sea between Cleethorpes on the Lincolnshire side and the long and thin headland of Spurn Head to the north. Ports on the Humber include the Port of Hull , the Port of Grimsby and the Port of Immingham ; there are lesser ports at New Holland and North Killingholme Haven . The estuary is navigable for the largest of deep-sea vessels. Inland connections for smaller craft are extensive but handle only

1701-734: The Severn Estuary in the United Kingdom and the Ems Dollard along the Dutch-German border. The width-to-depth ratio of these estuaries is typically large, appearing wedge-shaped (in cross-section) in the inner part and broadening and deepening seaward. Water depths rarely exceed 30 m (100 ft). Examples of this type of estuary in the U.S. are the Hudson River , Chesapeake Bay , and Delaware Bay along

1764-688: The Victoria Pier in Hull to the railway pier in New Holland . Steam ferries started in 1841, and in 1848 were purchased by the Manchester, Sheffield and Lincolnshire Railway . They, and their successors, ran the ferry until the bridge opened in 1981. Railway passenger and car traffic continued to use the pier until the end of ferry operations. The line of the bridge is similar to an ancient ferry route from Hessle to Barton upon Humber , which

1827-478: The black-tailed godwit , rely on estuaries. Two of the main challenges of estuarine life are the variability in salinity and sedimentation . Many species of fish and invertebrates have various methods to control or conform to the shifts in salt concentrations and are termed osmoconformers and osmoregulators . Many animals also burrow to avoid predation and to live in a more stable sedimental environment. However, large numbers of bacteria are found within

1890-533: The 'Five Rivers' of the Punjab ). An alternative derivation may be from the Latin verb abdo meaning "to hide, to conceal". The successive name Humbre / Humbri / Umbri may continue the meaning via the Latin verb umbro also meaning "to cover with shadows". Although it is now an estuary its entire length, the Humber had a much longer freshwater course during the Ice Age , extending across Doggerland , which

1953-529: The British airship R38 crashed into the estuary near Hull, killing 44 of the 49 crew on board. From 1974 to 1996, the areas now known as the East Riding of Yorkshire , North Lincolnshire and North East Lincolnshire constituted the county of Humberside . The Humber, from 1996, forms a boundary between the East Riding of Yorkshire (to the north) and North Lincolnshire and North East Lincolnshire, to

Humber - Misplaced Pages Continue

2016-537: The Humber is named for " Humber the Hun ", an invader who drowned there during battle in the earliest days of the chronicle. The Humber remained an important boundary throughout the Anglo-Saxon period, separating Northumbria from the southern kingdoms. The name Northumbria derives from the Anglo-Saxon Norðhymbre (plural) = "the people north of the Humber". The Humber is recorded with

2079-400: The United States. Estuaries are incredibly dynamic systems, where temperature, salinity, turbidity, depth and flow all change daily in response to the tides. This dynamism makes estuaries highly productive habitats, but also make it difficult for many species to survive year-round. As a result, estuaries large and small experience strong seasonal variation in their fish communities. In winter,

2142-560: The World Open Water Swimming Association. He raised over £900 for Humber Rescue, who provided safety support during the swim. The Humber is home both to resident fish and those returning from the sea to their spawning grounds in Yorkshire, Lincolnshire and Derbyshire . Salmon , sole , cod , eel , flounder , plaice , sprat , lamprey and sand goby have all been caught within the estuary. It

2205-714: The abbreviation Fl. Abi (The Abus river, Ancient Greek : Ἄβος ) in Ptolemy 's Geographia , discharging into the German Ocean (the North Sea ) south of Ocelum Promontorium (Spurn Head). Ptolemy also gives the Iron Age tribes of the area as the Coritani south of the Humber and the Parisi to the north. In the 1719 novel Robinson Crusoe , Crusoe leaves England on a ship departing from The Humber. On 23 August 1921,

2268-513: The above definition of an estuary and could be fully saline. Many estuaries suffer degeneration from a variety of factors including soil erosion , deforestation , overgrazing , overfishing and the filling of wetlands. Eutrophication may lead 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. The word "estuary"

2331-452: The bottom where they are harmless. Historically the oysters filtered the estuary's entire water volume of excess nutrients every three or four days. Today that process takes almost a year, and sediment, nutrients, and algae can cause problems in local waters. Some major rivers that run through deserts historically had vast, expansive estuaries that have been reduced to a fraction of their former size, because of dams and diversions. One example

2394-566: The conclusion of the year M.DCC.LVI. (1756); and A new and complete history of England, from the first settlement of Brutus, upwards of one thousand years before Julius Cæsar, to the year 1793 (1791-1794) by Charles Alfred Ashburton. A medieval studies scholar has pointed out that medieval maps of Britain represent a conception of a land divided by the rivers Humber and Severn into three realms. The river names, she suggests, are associated with legendary figures who attempt to transgress boundaries, in this case an invading king, who are destroyed by

2457-409: The dissolved oxygen from the water; thus hypoxic or anoxic zones can develop. Nitrogen is often the lead cause of eutrophication in estuaries in temperate zones. During a eutrophication event, biogeochemical feedback decreases the amount of available silica . These feedbacks also increase the supply of nitrogen and phosphorus, creating conditions where harmful algal blooms can persist. Given

2520-401: The effects of modifying the estuarine circulation. Fjord -type estuaries are formed in deeply eroded valleys formed by glaciers . These U-shaped estuaries typically have steep sides, rock bottoms, and underwater sills contoured by glacial movement. The estuary is shallowest at its mouth, where terminal glacial moraines or rock bars form sills that restrict water flow. In the upper reaches of

2583-601: The estuary impacted by human activities, and over time may shift the basic composition of the ecosystem, and the reversible or irreversible changes in the abiotic and biotic parts of the systems from the bottom up. For example, Chinese and Russian industrial pollution, such as phenols and heavy metals, has devastated fish stocks in the Amur River and damaged its estuary soil. Estuaries tend to be naturally eutrophic because land runoff discharges nutrients into estuaries. With human activities, land run-off also now includes

Humber - Misplaced Pages Continue

2646-424: The estuary, the depth can exceed 300 m (1,000 ft). The width-to-depth ratio is generally small. In estuaries with very shallow sills, tidal oscillations only affect the water down to the depth of the sill, and the waters deeper than that may remain stagnant for a very long time, so there is only an occasional exchange of the deep water of the estuary with the ocean. If the sill depth is deep, water circulation

2709-776: The estuary, with only narrow inlets allowing contact with the ocean waters. Bar-built estuaries typically develop on gently sloping plains located along tectonically stable edges of continents and marginal sea coasts. They are extensive along the Atlantic and Gulf coasts of the U.S. in areas with active coastal deposition of sediments and where tidal ranges are less than 4 m (13 ft). The barrier beaches that enclose bar-built estuaries have been developed in several ways: Fjords were formed where Pleistocene glaciers deepened and widened existing river valleys so that they become U-shaped in cross-sections. At their mouths there are typically rocks, bars or sills of glacial deposits , which have

2772-457: The first person to attempt and complete a two-way swim across the estuary, beginning and finishing at Hessle foreshore, with Barton on the south bank as the mid-way point, fulfilling the land-to-land criteria, covering a total of 4,085 m (4,467 yd). Royal holds the record for the fastest one-way swim across the Humber (35 minutes 11 seconds) and the fastest two-way swim (1 hour, 13 minutes, 46 seconds), certified by Guinness World Records and

2835-449: The first recorded woman to swim the Humber. Boyall, then aged 19 and living in Hull, was the Yorkshire swimming champion. She crossed the Humber from Hull to New Holland Pier swimming the distance in 50 minutes, 6 minutes slower than the existing men's record. Since 2011, Warners Health have organised the 'Warners Health Humber Charity Business Swim'. Twelve swimmers from companies across the Yorkshire region train and swim in an ellipse from

2898-609: The fish community is dominated by hardy marine residents, and in summer a variety of marine and anadromous fishes move into and out of estuaries, capitalizing on their high productivity. Estuaries provide a critical habitat to a variety of species that rely on estuaries for life-cycle completion. Pacific Herring ( Clupea pallasii ) are known to lay their eggs in estuaries and bays, surfperch give birth in estuaries, juvenile flatfish and rockfish migrate to estuaries to rear, and anadromous salmonids and lampreys use estuaries as migration corridors. Also, migratory bird populations, such as

2961-400: The great biodiversity of this ecosystem. During an algal bloom , fishermen have noticed a significant increase in the quantity of fish. A sudden increase in primary productivity causes spikes in fish populations which leads to more oxygen being utilized. It is the continued deoxygenation of the water that then causes a decline in fish populations. These effects can begin in estuaries and have

3024-420: The impacts do not end there. Plant death alters the entire food web structure which can result in the death of animals within the afflicted biome . Estuaries are hotspots for biodiversity , containing a majority of commercial fish catch, making the impacts of eutrophication that much greater within estuaries. Some specific estuarine animals feel the effects of eutrophication more strongly than others. One example

3087-525: The many chemicals used as fertilizers in agriculture as well as waste from livestock and humans. Excess oxygen-depleting chemicals in the water can lead to hypoxia and the creation of dead zones . This can result in reductions in water quality, fish, and other animal populations. Overfishing also occurs. Chesapeake Bay once had a flourishing oyster population that has been almost wiped out by overfishing. Oysters filter these pollutants, and either eat them or shape them into small packets that are deposited on

3150-422: The marine environment, such as plastics , pesticides , furans , dioxins , phenols and heavy metals . Such toxins can accumulate in the tissues of many species of aquatic life in a process called bioaccumulation . They also accumulate in benthic environments, such as estuaries and bay muds : a geological record of human activities of the last century. The elemental composition of biofilm reflect areas of

3213-575: The marsh causing increased rates of erosion . A similar phenomenon occurs in mangrove swamps , which are another potential ecosystem in estuaries. An increase in nitrogen causes an increase in shoot growth and a decrease in root growth. Weaker root systems cause a mangrove tree to be less resilient in seasons of drought, which can lead to the death of the mangrove. This shift in above ground and below ground biomass caused by eutrophication could hindered plant success in these ecosystems. Across all biomes, eutrophication often results in plant death but

SECTION 50

#1732765973883

3276-526: The north bank at Brough ; four hours later, he emerged on the south bank at Whitton . He is 6 feet 9 inches (2.06 m) tall and took advantage of a very low tide. He replicated this achievement on the television programme Top Gear (Series 10 Episode 6) when he beat James May who drove an Alfa Romeo 159 around the inland part of the estuary in a race without using the Humber Bridge. On Saturday 26 August 1911, Alice Maud Boyall became

3339-440: The now off-balance nitrogen cycle , estuaries can be driven to phosphorus limitation instead of nitrogen limitation. Estuaries can be severely impacted by an unbalanced phosphorus cycle, as phosphorus interacts with nitrogen and silica availability. With an abundance of nutrients in the ecosystem, plants and algae overgrow and eventually decompose, which produce a significant amount of carbon dioxide. While releasing CO 2 into

3402-520: The poem The revenge of Guendolen (circa 1786) by J.J. Proby. Historical accounts include the eighteenth century works The history of Great-Britain, from the first inhabitants thereof, 'till the death of Cadwalader, last king of the Britains; and of the Kings of Scotland to Eugenev (1701) by John Lewis; The naval history of Britain, from the earliest periods of which there are accounts in history, to

3465-427: The seawater in a layer that gradually thins as it moves seaward. The denser seawater moves landward along the bottom of the estuary, forming a wedge-shaped layer that is thinner as it approaches land. As a velocity difference develops between the two layers, shear forces generate internal waves at the interface, mixing the seawater upward with the freshwater. An examples of a salt wedge estuary is Mississippi River and

3528-411: The sediment which has a very high oxygen demand. This reduces the levels of oxygen within the sediment often resulting in partially anoxic conditions, which can be further exacerbated by limited water flow. Phytoplankton are key primary producers in estuaries. They move with the water bodies and can be flushed in and out with the tides . Their productivity is largely dependent upon the turbidity of

3591-435: The south bank to the north bank of the estuary under the Humber Bridge over a total distance of approximately 1 + 1 ⁄ 2 miles (2.4 km). Since then, an organised group crossing at the Humber Bridge has become an annual event, with a small number of pre-selected swimmers crossing in a 'pod' which remains close together, in aid of Humber Rescue. In 2019, Hull-based competitive open water swimmer Richard Royal became

3654-603: The south. The Humber Forts were built in the mouth of the estuary for the First World War . Planned in 1914, their construction started in 1915 and they were not completed until 1919. A coastal battery at Easington, Fort Goodwin or Kilnsea Battery , faced the Bull Sands Fort. They were also garrisoned during the Second World War, and were finally abandoned for military use in 1956. Fort Paull

3717-456: The volume of freshwater, the tidal range, and the extent of evaporation of the water in the estuary. Drowned river valleys are also known as coastal plain estuaries. In places where the sea level is rising relative to the land, sea water progressively penetrates into river valleys and the topography of the estuary remains similar to that of a river valley. This is the most common type of estuary in temperate climates. Well-studied estuaries include

3780-453: The water and atmosphere, these organisms are also intaking all or nearly all of the available oxygen creating a hypoxic environment and unbalanced oxygen cycle . The excess carbon in the form of CO 2 can lead to low pH levels and ocean acidification , which is more harmful for vulnerable coastal regions like estuaries. Eutrophication has been seen to negatively impact many plant communities in estuarine ecosystems . Salt marshes are

3843-835: The water. The main phytoplankton present are diatoms and dinoflagellates which are abundant in the sediment. A primary source of food for many organisms on estuaries, including bacteria , is detritus from the settlement of the sedimentation. Of the thirty-two largest cities in the world in the early 1990s, twenty-two were located on estuaries. As ecosystems, estuaries are under threat from human activities such as pollution and overfishing . They are also threatened by sewage, coastal settlement, land clearance and much more. Estuaries are affected by events far upstream, and concentrate materials such as pollutants and sediments. Land run-off and industrial, agricultural, and domestic waste enter rivers and are discharged into estuaries. Contaminants can be introduced which do not disintegrate rapidly in

SECTION 60

#1732765973883

3906-589: Was drowned in the river named Humber after him during his campaign against Southern Britain. His descendants became the List of legendary kings of Pictland . According to Geoffrey, following the division of Britain amongst Locrinus , Kamber , and Albanactus , Humber invaded Albany (which then covered all the lands north of the Humber) and killed Albanactus in open battle. The remaining natives fled south where Locrinus allied with Kamber and defeated Humber near

3969-405: Was named after her daughter Hafren . The war between Humber and Locrinus was retold in many histories, poems and dramas. Dramatic works include the play Locrine (1591; published 1595 under the initials W.S.). Poetry includes The Faerie Queene (1590) by Edmund Spenser ; "An old Ballad of a Duke of Cornwall's Daughter", published in a 1726 collection of old ballads; and the introduction to

#882117