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105-634: The bight is formed by the roughly right-angled intersection of the generally north-south Atlantic coast of New Jersey and the approximately east–west southern coast of Long Island at the mouth of the Hudson River . The New York Bight Apex is the area including and between the Hudson River estuary and the Raritan River estuary extending 6–7 km from the coast, and it includes both the Raritan Bay and

210-421: A free connection to the open sea . Estuaries form a transition zone between river environments and maritime environments and are an example of an ecotone . Estuaries are subject both to marine influences such as tides , waves , and the influx of saline water , and to fluvial influences such as flows of freshwater and sediment. The mixing of seawater and freshwater provides high levels of nutrients both in

315-573: 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

420-404: A large depositional plain near its mouth. This lack of significant deposits near the river mouth differs from most other American estuaries. Around New York Harbor, sediment also flows into the estuary from the ocean when the current is flowing north. The area around Hudson River was inhabited by indigenous peoples ages before Europeans arrived. The Lenape , Wappinger , and Mahican branches of

525-529: 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

630-497: A physical boundary between the states of New Jersey and New York at its southern end. Farther north, it marks local boundaries between several New York counties . The lower half of the river is a tidal estuary , deeper than the body of water into which it flows, occupying the Hudson Fjord , an inlet that formed during the most recent period of North American glaciation , estimated at 26,000 to 13,300 years ago. Even as far north as

735-408: 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

840-495: 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

945-436: 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

1050-470: 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

1155-573: Is 315 miles (507 km) long, with depths of 30 feet (9.1 m) for the stretch south of the Federal Dam, dredged to maintain the river as a shipping route. Some sections there are around 160 feet deep, and the deepest part of the Hudson, known as "World's End" (between the US Military Academy and Constitution Island ) has a depth of 202 feet (62 m). The Hudson and its tributaries, notably

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1260-668: Is a 315-mile (507 km) river that flows from north to south primarily through eastern New York , United States. It originates in the Adirondack Mountains of upstate New York at Henderson Lake in the town of Newcomb , and flows southward through the Hudson Valley to the New York Harbor between New York City and Jersey City , eventually draining into the Atlantic Ocean at Upper New York Bay . The river serves as

1365-455: 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

1470-465: Is believed that the first use of the name Hudson River in a map was in a map created by the cartographer John Carwitham in 1740. In 1939, the magazine Life described the river as "America's Rhine", comparing it to the 760-mile (1,220 km) Rhine in Central and Western Europe. The tidal Hudson is unusually straight for a river, and the earliest colonial Dutch charts of the Hudson River designated

1575-797: Is considering giving priority designation for offshore wind projects to the New York Bight. BOEM sells leases to qualified bidders. The waters in New Jersey and New York have been leased to private concerns for the development of US offshore wind farms . The first lease auctions were held in February 2022 for 5.6 gigawatts of power capacity and annual energy production of 19.6 TWh, for a total of $ 4.37 billion, with one area going for over one billion dollars. 40°05′42″N 73°14′55″W  /  40.094882°N 73.248596°W  / 40.094882; -73.248596 Hudson River The Hudson River

1680-649: Is credited for the Old World 's discovery of continental North America, with his journey in 1497 along the continent's coast. In 1524, Florentine explorer Giovanni da Verrazzano sailed north along the Atlantic seaboard and into New York Harbor, however he left the harbor shortly thereafter, without navigating into the Hudson River. In 1598, Dutch men employed by the Greenland Company wintered in New York Bay . In 1609

1785-509: 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

1890-567: Is estimated to have formed between 26,000 and 13,300 years ago. Along the river, the Palisades are of metamorphic basalt , or diabases , the Highlands are primarily granite and gneiss with intrusions , and from Beacon to Albany, shales and limestones , or mainly sedimentary rock . The Narrows were most likely formed about 6,000 years ago at the end of the last ice age. Previously, Staten Island and Long Island were connected, preventing

1995-411: 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

2100-560: 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

2205-639: 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

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2310-534: The Algonquians lived along the river, mostly in peace with the other groups. The Algonquians in the region mainly lived in small clans and villages throughout the area. One major settlement was called Navish, which was located at Croton Point , overlooking the Hudson River. Other settlements were located in various locations throughout the Hudson Highlands . Many villagers lived in various types of houses, which

2415-588: The Battle of Harlem Heights the following month. Later that year, the British and Continental Armies were involved in skirmishes and battles in rivertowns of the Hudson in Westchester County, culminating in the Battle of White Plains . Also in late 1776, New England militias fortified the river's choke point known as the Hudson Highlands , which included building Fort Clinton and Fort Montgomery on either side of

2520-793: The Bear Mountain Bridge , which connects Westchester and Rockland Counties. Afterward, leaving the Hudson Highlands, the river enters Haverstraw Bay , the widest point of the river at 3.5 miles (5.6 km) wide. Shortly thereafter, the river forms the Tappan Zee and flows under the Tappan Zee Bridge , which carries the New York State Thruway between Tarrytown and Nyack in Westchester and Rockland Counties respectively. At

2625-695: The Delaware River at Honesdale, Pennsylvania , and the Hudson River at Kingston, New York. This canal enabled the transportation of coal, and later other goods as well, between the Delaware and Hudson River watersheds. The combination of these canals made the Hudson River one of the most vital waterways for trade in the nation. During the Industrial Revolution , the Hudson River became a major location for production, especially around Albany and Troy. The river allowed for fast and easy transport of goods from

2730-561: The Dutch East India Company financed English navigator Henry Hudson in his search for the Northeast Passage , but thwarted by sea ice in that direction, he sailed westward across the Atlantic in pursuit of a Northwest Passage . During the search, Hudson sailed up the river that would later be named after him. He then sailed upriver to a point near Stuyvesant (Old Kinderhook), and the ship’s boat with five members ventured to

2835-584: The Dutch East India Company who explored it in 1609, and after whom Hudson Bay in Canada is also named. It had previously been observed by Italian explorer Giovanni da Verrazzano sailing for King Francis I of France in 1524, as he became the first European known to have entered the Upper New York Bay , but he considered the river to be an estuary. The Dutch called the river the North River , and they called

2940-511: The Federal Dam in Troy . There are about two high tides and two low tides per day. As the tide rises, the tidal current moves northward, taking enough time that part of the river can be at high tide while another part can be at the bottom of its low tide. Strong tides make parts of New York Harbor difficult and dangerous to navigate. During the winter, ice floes may drift south or north, depending upon

3045-721: The Harlem River Ship Canal connecting to the Harlem River ), the east bank of the river becomes Manhattan . The river is sometimes still called the North River from this point south. The George Washington Bridge crosses the river between Fort Lee and the Washington Heights neighborhood of Manhattan. The Lincoln Tunnel and the Holland Tunnel also cross under the river between Manhattan and New Jersey. South of

3150-719: 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

3255-463: The Hudson Valley , flowing along the west bank of Albany and the east bank of Rensselaer . Interstate 90 crosses the Hudson into Albany at this point in the river. The Hudson then leaves the Capital District, forming the boundary between Greene and Columbia Counties. It then meets its confluence with Schodack Creek, widening considerably at this point. After flowing by Hudson , the river forms

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3360-595: 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

3465-628: 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

3570-542: The Mohawk River , the largest tributary of the Hudson River, in Waterford . The river then reaches the Federal Dam in Troy , marking an impoundment of the river. At an elevation of 2 feet (0.61 m), the bottom of the dam marks the beginning of the tidal influence in the Hudson as well as the beginning of the lower Hudson River. South of the Federal Dam, the Hudson River begins to widen considerably. The river enters

3675-638: The Saint Lawrence Seaway . Further south the Hudson takes in water from the Batten Kill River and Fish Creek near Schuylerville . The river then forms the boundary between Saratoga and Rensselaer counties. The river then enters the heart of the Capital District . It takes in water from the Hoosic River , which extends into Massachusetts . Shortly thereafter the river has its confluence with

3780-648: 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

3885-616: The St. Lawrence Seaway , and then British cities such as Montreal to the Hudson River and New York City. Another major canal was the Oswego Canal , which connected the Erie Canal to Oswego and Lake Ontario , and could be used to bypass Niagara Falls. The Cayuga-Seneca Canal connected the Erie Canal to Cayuga Lake and Seneca Lake . Farther south, the Delaware and Hudson Canal was built between

3990-610: The United States Geological Survey (USGS). USGS maps show the longest source of the Hudson as the Opalescent on the western slopes of Little Marcy Mountain, originating two miles north of Lake Tear of the Clouds. Using river names as seen on maps, Indian Pass Brook flows into Henderson Lake . The outlet of Henderson Lake is most commonly referred to as the official start of the Hudson River, as it flows east and meets

4095-478: 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

4200-702: The 1800s. One of the most significant canals of this era was the Erie Canal . The canal was built to link the Midwest to the Port of New York , a significant seaport during that time, by way of the Great Lakes , the canal, the Mohawk River , and the Hudson River. The completion of the canal enhanced the development of the American West, allowing settlers to travel west, send goods to markets in frontier cities, and export goods via

4305-642: The 21st century. The river was called Ka’nón:no or Ca-ho-ha-ta-te-a ("the river") by the Haudenosaunee , and it was known as Muh-he-kun-ne-tuk ("river that flows two ways" or "waters that are never still" ) or Mahicannittuk by the Mohican nation who formerly inhabited both banks of the lower portion of the river. The meaning of the Mohican name comes from the river's long tidal range. The Delaware Tribe of Indians (Bartlesville, Oklahoma) considers

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4410-603: The Algonquians called wigwams , though large families often lived in longhouses that could be a hundred feet long. At the associated villages, they grew corn, beans, and squash. They also gathered other types of plant foods, such as hickory nuts and many other wild fruits and tubers. In addition to agriculture, the Algonquians also fished in the Hudson River, focusing on various species of freshwater fish, as well as various variations of striped bass , American eels , sturgeon , herring , and shad . Oyster beds were also common on

4515-668: The Battery , the river proper ends, meeting the East River to form Upper New York Bay, also known as New York Harbor . Its outflow continues through the Narrows between Brooklyn and Staten Island , under the Verrazzano Bridge , and into Lower New York Bay and the Atlantic Ocean through the Hudson Canyon . The lower Hudson is a tidal estuary, with tidal influence extending as far as

4620-589: The British, who had invaded the largely-defenseless New Amsterdam. New Amsterdam and the colony of New Netherland were renamed New York, after the Duke of York . Under British colonial rule, the Hudson Valley became an agricultural hub. Manors were developed on the east side of the river, and the west side contained many smaller and independent farms. In 1754, the Albany Plan of Union was created at Albany City Hall on

4725-646: The Dutch was Rio de Montaigne . Later, they generally termed it the Noortrivier , or " North River ", the Delaware River being known as the Zuidrivier , or "South River". Other occasional names for the Hudson included Manhattes rieviere "Manhattan River", Groote Rivier "Great River", and de grootte Mouritse reviere , or "the Great Maurits River" (after Maurice, Prince of Orange ). The translated name North River

4830-450: The Hudson River and New York City. The completion of the canal made New York City one of the most vital ports in the nation, surpassing the Port of Philadelphia and ports in Massachusetts . After the completion of the Erie Canal, smaller canals were built to connect it with the new system. The Champlain Canal was built to connect the Hudson River near Troy to the southern end of Lake Champlain. This canal allowed boaters to travel from

4935-451: The Hudson River from terminating via the Narrows. At that time, the Hudson River emptied into the Atlantic Ocean through a more westerly course through parts of present-day northern New Jersey, along the eastern side of the Watchung Mountains to Bound Brook, New Jersey and then on into the Atlantic Ocean via Raritan Bay . A buildup of water in the Upper New York Bay eventually allowed the Hudson River to break through previous land mass that

5040-427: The Hudson River, and would later become Kingston. Fort Orange was founded on the river north of Wiltwyck, and later became known as Albany. The Dutch West India Company operated a monopoly on the region for roughly twenty years before other businessmen were allowed to set up their own ventures in the colony. In 1647, Director-General Peter Stuyvesant took over management of the colony, and surrendered it in 1664 to

5145-405: The Hudson and a metal chain between the two. In 1777, Washington expected the British would attempt to control the Hudson River, however they instead conquered Philadelphia, and left a smaller force in New York City, with permission to strike the Hudson Valley at any time. The British attacked on October 5, 1777, in the Battle of Forts Clinton and Montgomery by sailing up the Hudson River, looting

5250-416: The Hudson. The plan allowed the colonies to treaty with the Iroquois and provided a framework for the Continental Congress . During the American Revolutionary War , the British realized that the river's proximity to Lake George and Lake Champlain would allow their navy to control the water route from Montreal to New York City. British general John Burgoyne planned the Saratoga campaign , to control

5355-427: The Langerack by the Dutch. An embellished (and partly erroneous) list of "The Old Reaches" was published in a tourist guidebook for steamboat passengers in the nineteenth century. The source of the Hudson River is Henderson Lake , located in the Adirondack Mountains at an elevation of 4,322 ft (1,317 m). However, the photogenic Lake Tear of the Clouds is more conventionally cited in popular culture as

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5460-416: The Lower Bay. The geography of the bight has long been of major concern to meteorologists in the study of tropical storm patterns along the eastern coast of North America. These geographical characteristics of the area are among the primary reasons that, despite its northerly latitude, the New York Metropolitan Area is considered a high danger zone for storm-generated ocean-water surges. Specifically, in

5565-454: The Mohawk River, drain an area of 13,000 square miles (34,000 km ), the Hudson River Watershed. It covers much of New York, as well as parts of Connecticut, Massachusetts, New Jersey, and Vermont. Parts of the Hudson River form coves , such as Weehawken Cove in the towns of Hoboken and Weehawken in New Jersey. The City of Poughkeepsie and several adjacent communities in the mid-Hudson valley, totalling about 100,000 people, rely on

5670-400: 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,

5775-513: 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"

5880-452: 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

5985-601: The boundary between Orange and Dutchess Counties. It flows between Newburgh and Beacon and under the Newburgh Beacon Bridge , taking in the Fishkill Creek . In this area, between Gee's Point at the US Military Academy and Constitution Island , an area known as "World's End" marks the deepest part of the Hudson, at 202 feet (62 m). Shortly thereafter, the river enters the Hudson Highlands between Putnam and Orange Counties, flowing between mountains such as Storm King Mountain , Breakneck Ridge , and Bear Mountain . The river narrows considerably here before flowing under

6090-485: The boundary between Ulster and Columbia Counties and Ulster and Dutchess Counties, passing Germantown and Kingston . The Delaware and Hudson Canal meets the river at this point. The river then flows by Hyde Park , former residence of Franklin D. Roosevelt , and alongside the city of Poughkeepsie , flowing under the Walkway over the Hudson and the Mid-Hudson Bridge . Afterwards, the Hudson passes Wappingers Falls and takes in Wappinger Creek . The river then forms

6195-418: The city of Troy , the flow of the river changes direction with the tides. The Hudson River runs through the Munsee , Lenape , Mohican , Mohawk , and Haudenosaunee homelands. Prior to European exploration, the river was known as the Mahicannittuk by the Mohicans, Ka'nón:no by the Mohawks, and Muhheakantuck by the Lenape. The river was subsequently named after Henry Hudson , an Englishman sailing for

6300-413: The closely related Mohicans to be a part of the Lenape people, and so the Lenape also claim the Hudson as part of their ancestral territory, also calling it Muhheakantuck . The first known European name for the river was the Rio San Antonio as named by the Portuguese explorer in Spain's employ, Estêvão Gomes , who explored the Mid-Atlantic coast in 1525. Another early name for the Hudson used by

6405-409: 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

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6510-428: The early 19th century United States. Pollution in the Hudson River increased in the 20th century, more acutely by mid-century, particularly with industrial contamination from polychlorinated biphenyls , also known by their acronym PCBs. Pollution control regulations, enforcement actions and restoration projects initiated in the latter 20th century have begun to improve water quality, and restoration work has continued in

6615-401: 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

6720-543: 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

6825-424: 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

6930-720: 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

7035-609: 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

7140-400: 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

7245-423: The hamlet of North River , and takes in the Schroon River at Warrensburg . Further south, the river forms the boundary between Warren and Saratoga Counties. The river then takes in the Sacandaga River from the Great Sacandaga Lake . Shortly thereafter, the river leaves the Adirondack Park, flows under Interstate 87 , and through Glens Falls , just south of Lake George although receiving no streamflow from

7350-420: 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

7455-421: The interior of the Northeast to the coast. Hundreds of factories were built around the Hudson, in towns including Poughkeepise, Newburgh, Kingston, and Hudson. The North Tarrytown Assembly (later owned by General Motors ), on the river in Sleepy Hollow, was a large and notable example. The River links to the Erie Canal and Great Lakes, allowing manufacturing in the Midwest, including automobiles in Detroit, to use

7560-539: The lake. It next goes through Hudson Falls . At this point the river forms the boundary between Washington and Saratoga Counties. Here the river has an elevation of 200 feet (61 m). Just south in Fort Edward , the river reaches its confluence with the Champlain Canal , which historically provided boat traffic between New York City and Montreal and the rest of Eastern Canada via the Hudson, Lake Champlain and

7665-525: 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

7770-422: 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

7875-575: 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

7980-463: The most successful painters of the school. At the beginning of the 19th century, transportation from the US east coast into the mainland was difficult. Ships were the fastest vehicles at the time, as trains were still being developed and automobiles were roughly a century away. In order to facilitate shipping throughout the country's interior, numerous canals were constructed between internal bodies of water in

8085-526: The mouth of the river. The deeply eroded old riverbed beyond the current shoreline, Hudson Canyon , is a rich fishing area. The former riverbed is clearly delineated beneath the waters of the Atlantic Ocean, extending to the edge of the continental shelf . As a result of the glaciation and the rising sea levels , the lower half of the river is now a tidal estuary that occupies the Hudson Fjord. The fjord

8190-480: The narrow, meandering stretches as racks , or reaches. These names included the four "lower reaches" through the Hudson Highlands (Seylmakers rack, Cocks rack, Hoogh rack, and Vosserack) plus the four "upper reaches" from Inbocht Bay to Kinderhook (Backers rack, Jan Pleysiers rack, Klevers rack, and Harts rack). A ninth reach was described as "the long reach" by the Englishman Robert Juet and designated as

8295-440: 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

8400-409: The presence of a hurricane off the coast of New Jersey, the easterly cyclonic winds along the northern edge of the storm could drive a strong surge to the west, laterally along the southern coast of Long Island and straight into Lower New York Bay . The angular bend of the New Jersey coast would leave little outlet for the surge, leading to widespread flooding throughout New York City , especially along

8505-562: The present-day Delaware River the South River , which formed the spine of the Dutch colony of New Netherland . Settlements of the colony clustered around the Hudson, and its strategic importance as the gateway to the American interior led to years of competition between the English and the Dutch over control of the river and colony. During the 18th century, the river valley and its inhabitants were

8610-406: The remaining wilderness, which was fast disappearing from the Hudson Valley just as it was coming to be appreciated for its qualities of ruggedness and sublimity . The school characterizes the artistic body, its New York location, its landscape subject matter, and often its subject, the Hudson River. In general, Hudson River School artists believed that nature in the form of the American landscape

8715-499: The river and therefore cut off the patriot hub of New England (to the river's east) from the South and Mid-Atlantic regions to the river's west. The action would allow the British to focus on rallying the support of loyalists in the southerly states. As a result, numerous battles were fought along the river and in nearby waterways. These include the Battle of Long Island , in August 1776 and

8820-672: The river floor, which provided an extra source of nutrition. Land hunting consisted of turkey, deer, bear, and other animals. The lower Hudson River was inhabited by the Lenape, while further north, the Wappingers lived from Manhattan Island up to Poughkeepsie . They traded with both the Lenape to the south and the Mahicans to the north. The Mahicans lived in the northern part of the valley from present-day Kingston to Lake Champlain , with their capital located near present-day Albany . John Cabot

8925-491: The river for their drinking water. New York Harbor, between the Narrows and the George Washington Bridge, has a mix of fresh and ocean water, mixed by wind and tides to create an increasing gradient of salinity from the river's top to its bottom. This varies with season, weather, variation of water circulation, and other factors; snowmelt at winter's end increases the freshwater flow downstream. The salt line of

9030-547: The river for transport. With industrialization came new technologies for transport, including steamboats for faster transport. In 1807, the North River Steamboat (later known as Clermont), became the first commercially successful steamboat. It carried passengers between New York City and Albany along the Hudson River. Tidal estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with

9135-573: The river varies from the north in Poughkeepsie to the south at Battery Park in New York City, though it usually lies near Newburgh. The Hudson is sometimes called, in geological terms, a drowned river . The rising sea levels after the retreat of the Wisconsin glaciation , the most recent ice age , have resulted in a marine incursion that drowned the coastal plain and brought salt water well above

9240-427: 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

9345-411: 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

9450-466: The source of the Hudson. The river is named Feldspar Brook from where it emerges from Lake Tear of the Clouds until its confluence with the Opalescent River , after which it becomes the Opalescent until it reaches Calamity Brook flowing southward into the eastern outlet of Henderson Lake. After this point, the stream is known as the Hudson River according to the cartographical definition used by

9555-407: The southern coast of Staten Island and Manhattan . Examples of the effects of this phenomenon are the 1893 New York hurricane , in which storm surges of up to 30 feet (9.1 m) were reported, and Hurricane Sandy in 2012. The sea floor of the New York Bight consists largely of continental shelf . It includes the offshore Hudson Canyon , an undersea Pleistocene submarine canyon that

9660-656: The southwest flowing Calamity Brook. The confluence of the two rivers however is where most maps begin to use the Hudson River name on a cartographical basis. South of the outlet of Sanford Lake, the Opalescent River flows into the Hudson. The Hudson then flows south, taking in Beaver Brook and the outlet of Lake Harris. After its confluence with the Indian River, the Hudson forms the boundary between Essex and Hamilton counties. The Hudson flows entirely into Warren County in

9765-589: The state line with New Jersey the west bank of the Hudson enters Bergen County . The Palisades are large, rocky cliffs along the west bank of the river; also known as Bergen Hill at their lower end in Hudson County . Further south the east bank of the river becomes Yonkers and then the Riverdale neighborhood of the Bronx in New York City. South of the confluence of the Hudson and Spuyten Duyvil Creek (subsumed by

9870-497: The subject and inspiration of Washington Irving , the first internationally acclaimed American author. In the nineteenth century, the area inspired the Hudson River School of landscape painting , an American pastoral style, as well as the concepts of environmentalism and wilderness . The Hudson River was also the eastern outlet for the Erie Canal , which, when completed in 1825, became an important transportation artery for

9975-495: The tides. The Mahican name of the river represents its partially estuarine nature: muh-he-kun-ne-tuk means "the river that flows both ways." Due to tidal influence from the ocean extending to Troy, NY, freshwater discharge is only about 17,400 cubic feet (490 m ) per second on average. The mean fresh water discharge at the river's mouth in New York is approximately 21,900 cubic feet (620 m ) per second. The Hudson River

10080-413: The vicinity of present-day Albany, reaching an end to navigation. The Dutch subsequently began to colonize the region, establishing the colony of New Netherland , including three major fur-trading outposts: New Amsterdam , Wiltwyck , and Fort Orange . New Amsterdam was founded at the mouth of the Hudson River, and would later become known as New York City . Wiltwyck was founded roughly halfway up

10185-625: The village of Peekskill and capturing the two forts. In 1778, the Continentals constructed the Great West Point Chain in order to prevent another British fleet from sailing up the Hudson. Hudson River School paintings reflect the themes of discovery, exploration, and settlement in America in the mid-19th century. The detailed and idealized paintings also typically depict a pastoral setting. The works often juxtapose peaceful agriculture and

10290-456: 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

10395-453: 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

10500-619: 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

10605-835: 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

10710-512: Was an ineffable manifestation of God, though the artists varied in the depth of their religious conviction. Their reverence for America's natural beauty was shared with contemporary American writers such as Henry David Thoreau and Ralph Waldo Emerson . The artist Thomas Cole is generally acknowledged as the founder of the Hudson River School , his work first being reviewed in 1825, while painters Frederic Edwin Church and Albert Bierstadt were

10815-435: Was connecting Staten Island and Brooklyn to form the Narrows as it exists today. This allowed the Hudson River to find a shorter route to the Atlantic Ocean via its present course between New Jersey and New York City. Suspended sediments, mainly consisting of clays eroded from glacial deposits and organic particles, can be found in abundance in the river. The Hudson has a relatively short history of erosion, so it does not have

10920-512: Was formed by the Hudson River during the ice ages , when the sea levels were lower. The bight includes major shipping channels that access New York Harbor. The Bureau of Ocean Energy Management (BOEM) is a federal agency responsible for determining offshore areas where wind farms may be built on the Outer Continental Shelf . In March 2021, reports appeared that the Biden administration

11025-563: Was used in the New York metropolitan area up until the early 1900s, with limited use continuing into the present day. The term persists in radio communication among commercial shipping traffic, especially below the Tappan Zee . The term also continues to be used in names of facilities in the river's southern portion, such as the North River piers , North River Tunnels , and the North River Wastewater Treatment Plant . It

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