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38-631: The Ogunquit River is a 9.8-mile-long (15.8 km) tidal river in southern Maine . It flows to the Atlantic Ocean at the town of Ogunquit . 43°15′1.2″N 70°35′43.3″W  /  43.250333°N 70.595361°W  / 43.250333; -70.595361 This article related to a river in Maine is a stub . You can help Misplaced Pages by expanding it . Tidal river Generally, tidal rivers are short rivers with relatively low discharge rates but high overall discharge, which generally implies

76-435: A "river reach." In terms of tides, tidal rivers are classified as microtidal (<2 m), mesotidal (2-4 m), and macrotidal (>4 m). Areas of brackish water seaward of the tidal river section are often called estuaries . A phenomenon commonly associated with tidal rivers is a tidal bore , where a wall of water travels upriver during a flood tide. Freshwater tidal rivers discharge large amounts of sediment and nutrients into

114-474: A shallow river with a large coastal mouth. In some cases, high tides impound downstream flowing freshwater, reversing the flow and increasing the water level of the lower section of river, forming large estuaries . High tides can be noticed as far as 100 kilometres (62 mi) upstream. Oregon's Coquille River is one such stream for which that effect can be noticed. The area of a tidal river can be difficult to define. The term "tidal river" generally encompasses

152-524: Is 1,344,200 square kilometres (518,998.5 sq mi), of which 839,200 km (324,016.9 sq mi) is in Canada and 505,000 km (194,981.6 sq mi) is in the United States. The basin covers parts of Ontario and Quebec in Canada, parts of Minnesota , Wisconsin , Illinois , Indiana , Ohio , Pennsylvania , New York , Vermont , and nearly the entirety of the state of Michigan in

190-626: Is a large international river in the middle latitudes of North America connecting the Great Lakes to the North Atlantic Ocean . Its waters flow in a northeasterly direction from Lake Ontario to the Gulf of St. Lawrence , traversing Ontario and Quebec in Canada and New York in the United States. A section of the river demarcates the Canada–U.S. border . As the primary drainage outflow of

228-669: Is home to the Thousand Islands . Today, the St. Lawrence River begins at the outflow of Lake Ontario and flows adjacent to Gananoque , Brockville , Morristown , Ogdensburg , Massena , Cornwall , Montreal , Trois-Rivières , and Quebec City before draining into the Gulf of St. Lawrence , often given as the largest estuary in the world. The estuary begins at the eastern tip of Île d'Orléans , just downstream from Quebec City. The river becomes tidal around Quebec City. The St. Lawrence River runs 3,058 kilometres (1,900  mi ) from

266-575: Is that country's sixth oldest surviving European place-name. The earliest regular Europeans in the area were the Basques , who came to the St Lawrence Gulf and River in pursuit of whales from the early 16th century. The Basque whalers and fishermen traded with indigenous Americans and set up settlements, leaving vestiges all over the coast of eastern Canada and deep into the St. Lawrence River. Basque commercial and fishing activity reached its peak before

304-513: Is the second longest river in Canada. Lake Champlain and the Ottawa , Richelieu , Saint-Maurice , Saint-François , Chaudière and Saguenay rivers drain into the St. Lawrence. The St. Lawrence River is in a seismically active zone where fault reactivation is believed to occur along late Proterozoic to early Paleozoic normal faults related to the opening of the Iapetus Ocean . The faults in

342-667: The Armada Invencible ' s disaster (1588), when the Basque whaling fleet was confiscated by King Philip II of Spain . Initially, the whaling galleons from Labourd were not affected by the Spanish defeat. Until the early 17th century, the French used the name Rivière du Canada to designate the St. Lawrence upstream to Montreal and the Ottawa River after Montreal. The St. Lawrence River served as

380-618: The Great Lakes Basin , the St. Lawrence has the second-highest discharge of any river in North America (after the Mississippi River ) and the 16th-highest in the world. The estuary of St. Lawrence is often cited by scientists as the largest in the world. Significant natural landmarks of the river and estuary include the 1,864 river islands of the Thousand Islands , the endangered whales of Saguenay–St. Lawrence Marine Park , and

418-700: The Gulf of St. Lawrence : Flowing through and adjacent to numerous Indigenous homelands, the river was a primary thoroughfare for many peoples. Beginning in Dawnland at the Gulf of St. Lawrence, the river borders Mi'kma'ki in the South (what is today known as the Canadian Maritimes ), and Nitassinan in the North, the national territory of the Innu people . On the south shore beyond

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456-501: The Hudson River . The Accommodation with ten passengers made her maiden voyage from Montreal to Quebec City in 66 hours, for 30 of which she was at anchor. She had a keel of 75 feet, and a length overall of 85 feet. The cost of a ticket was eight dollars upstream, and nine dollars down. She had berths that year for twenty passengers. Within a decade, daily service was available in the hotly-contested Montreal-Quebec route. Because of

494-872: The Mi'kmaw district of Gespe'gewa'ki , the river passes Wolastokuk (the Maliseet homeland), Pαnawαhpskewahki (the Penobscot homeland), and Ndakinna (the Abenaki homeland). Continuing, the river passes through the former country of the St. Lawrence Iroquois and then three of the six homelands of the Haudenosaunee : the Mohawk or Kanienʼkehá꞉ka , the Oneida or Onyota'a:ka , and the Onondaga or Onöñda’gaga’ . In

532-670: The Thousand Islands chain near Alexandria Bay, New York and Kingston, Ontario ; the Hochelaga Archipelago , including the Island of Montreal and Île Jésus ( Laval ); the Lake St. Pierre Archipelago (classified a biosphere world reserve by the UNESCO in 2000) and the smaller Mingan Archipelago . Other islands include Île d'Orléans near Quebec City and Anticosti Island north of the Gaspé . It

570-591: The 10th of August feast day for Saint Lawrence in 1535. Indigenous people use the following names: In winter, the St. Lawrence River begins producing ice in December, with the formation of ice cubes between Montreal and Quebec City . The prevailing winds and currents push this ice towards the estuary, and it reaches the east of Les Méchins at the end of December. Ice covers the entire Gulf of St. Lawrence in January and February. Ice helps navigation by preventing

608-588: The Amazon depression. The tidal behaviour of a river is an important consideration in riverboat navigation. For major rivers, such as the Saint Lawrence River (and the associated Saint Lawrence Seaway ), publications such as an atlas of surface currents (or tidal currents) may be available, based on sophisticated hydrodynamic models, subject to empirical validation. Saint Lawrence River The St. Lawrence River ( French : Fleuve Saint-Laurent )

646-687: The Appalachian division at all. The source of the North River in the Mesabi Range in Minnesota (Seven Beaver Lake) is considered to be the source of the St. Lawrence River. Because it crosses so many lakes, the water system frequently changes its name. From source to mouth, the names are: The St. Lawrence River also passes through Lake Saint-Louis and Lake Saint-Pierre in Quebec. The St. Lawrence River and

684-406: The St. Lawrence River includes: Large marine mammals travel in all the seas of the earth, the research and observations of these giants concern fishermen and shipping industry , exercise a fascination and a keen interest for laymen and, subjects of endless studies for scientists from Quebec, Canada and around the world. Thirteen species of cetaceans frequent the waters of the estuary and

722-622: The St. Lawrence to attack the city from the west, which they successfully did at the Battle of the Plains of Abraham . The river was used again by the British to defeat the French siege of Quebec under the Chevalier de Lévis in 1760. In 1809, the first steamboat to ply its trade on the St. Lawrence was built and operated by John Molson and associates, a scant two years after Fulton's steam-powered navigation of

760-773: The United States). The Seaway (including the Welland Canal ) now permits ocean-going vessels to pass all the way to Lake Superior . During the Second World War , the Battle of the St. Lawrence involved submarine and anti-submarine actions throughout the lower St. Lawrence River and the entire Gulf of St. Lawrence , Strait of Belle Isle and Cabot Strait from May to October 1942, September 1943, and again in October and November 1944. During this time, German U-boats sank several merchant marine ships and three Canadian warships. In

798-579: The United States. The average discharge below the Saguenay River is 16,800 cubic metres per second (590,000 cu ft/s). At Quebec City, it is 12,101 m /s (427,300 cu ft/s). The average discharge at the river's source, the outflow of Lake Ontario, is 7,410 m /s (262,000 cu ft/s). The St. Lawrence River includes Lake Saint Francis at Salaberry-de-Valleyfield , Lake Saint-Louis south of Montreal and Lake Saint Pierre east of Montreal. It encompasses four archipelagoes :

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836-593: The area are rift -related and comprise the Saint Lawrence rift system . According to the United States Geological Survey, the St. Lawrence Valley is a physiographic province of the larger Appalachian division, containing the Champlain section. However, in Canada, where most of the valley is, it is instead considered part of a distinct St. Lawrence Lowlands physiographic division, and not part of

874-411: The area upriver of the maximum limit of salinity intrusion and downriver of tidal water level fluctuations. This classification is based on both tidal trends and salinity. By this definition, a tidal river will be affected by tides, surges, and sea level variation, though its water may not have a high salinity content. If that is the case, this section of river can be known as a "tidal freshwater river" or

912-529: The early 17th century, the Huron-Wendat Nation migrated from their original country of Huronia to what is now known as Nionwentsïo centred around Wendake . Nionwentsïo occupies both the north and south shores of the river, overlapping with Nitassinan and the more western Wabanaki or Dawnland countries. Adjacent on the north shore is the Atikamekw territorial homeland of Nitaskinan and, upstream,

950-521: The farthest headwater to the mouth and 1,197 km (743.8 mi) from the outflow of Lake Ontario. These numbers include the estuary; without the estuary, the length from Lake Ontario is c. 500 km (c. 300 mi). The farthest headwater is the North River in the Mesabi Range at Hibbing , Minnesota. Its drainage area, which includes the Great Lakes, the world's largest system of freshwater lakes,

988-600: The formation of waves, and therefore spray, and prevents the icing of ships. With the draining of the Champlain Sea , due to a rebounding continent from the Last Glacial Maximum , the St. Lawrence River was formed. The Champlain Sea lasted from about 13,000 years ago to about 10,000 years ago and was continuously shrinking during that time, a process that continues today. The head of the St. Lawrence River, near Lake Ontario,

1026-466: The further reaches of Anishinaabewaki, specifically the homelands of the Algonquin and Mississauga Nations. The Norse explored the Gulf of St. Lawrence in the 11th century and were followed by fifteenth- and early sixteenth-century European mariners, such as John Cabot , and the brothers Gaspar and Miguel Corte-Real . The first European explorer known to have sailed up the St. Lawrence River itself

1064-507: The highest flow, largest volume of sediment discharge, and largest drainage basin of any river in the world. Because of its large flow volume, saltwater never enters the mouth of the Amazon River, and the limit of salinity is 150 km seaward of the river mouth. The Amazon River is classified as macrotidal, as its tidal range is 4 to 8 meters at the mouth of the river. During low-flow periods, this river's tidal area may extend over 1,000 km into

1102-618: The inland ports of the Great Lakes Waterway . The river has been called a variety of names by local First Nations . Beginning in the 16th century, French explorers visited what is now Canada and gave the river names such as the Grand fleuve de Hochelaga and the Grande rivière du Canada , where fleuve and rivière are two French words ( fleuve being a river that flows into the sea). The river's present name has been used since 1604 when it

1140-489: The largest tributaries of the Great Lakes . The St. Lawrence River tributaries are listed upstream from the mouth. The major tributaries of the inter-lake sections are also shown, as well as the major rivers that flow into the Great Lakes. Great Lakes tributaries are listed in alphabetical order. The list includes all tributaries with a drainage area of at least 1,000 square kilometres and an average flow of more than 10 cubic metres per second. tributary The diversity of

1178-470: The limestone monoliths of the Mingan Archipelago . Long a transportation route to Indigenous peoples , the St. Lawrence River has played a key role in the history of Canada and in the development of cities such as Montreal and Quebec City . The river remains an important shipping route as the backbone of the St. Lawrence Seaway , a lock and canal system that enables world marine traffic to access

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1216-509: The main route for European exploration of the North American interior, first pioneered by French explorer Samuel de Champlain . Control of the river was crucial to British strategy to capture New France in the Seven Years' War . Having captured Louisbourg in 1758, the British sailed up to Quebec the following year thanks to charts drawn up by James Cook . British troops were ferried via

1254-748: The ocean. This is a necessary influx for the global water balance. Rivers contribute about 95% of sediment entering the ocean. Discharge estimates from freshwater tidal rivers are important for informing water resource management and climate analyses. These discharge amounts can be estimated using tidal statistics. Some challenges to estimating discharge amounts include reversing tidal flow, compensation flow for Stokes drift, spring-neap water storage effects, lateral circulation, and multiple distributaries or ebb and flood channels. Tidal rivers face threats due to climate change and other human-caused impacts. In tidal rivers' deltas, mineral and water extraction, reduced sediment input, and floodplain engineering are causing

1292-466: The risk of flooding. The Rio de la Plata is a tidal river on the border between Uruguay and Argentina . It is classified as microtidal, as its tidal range is less than 1 meter. This river is significant mostly due to its size, as more than one tidal wavelength can be accommodated in this river's estuary. Similarly to most tidal rivers, saltwater does not extend far up the river, due to its large volume of freshwater discharge. The Amazon River has

1330-452: The sinking of deltas. This, combined with rising sea levels , is causing tidal rivers to become deeper, which amplifies the tidal motion and increases the extent of salt intrusion. Increasing salinity in tidal rivers could have a detrimental impact on freshwater organisms and alter tidal river ecosystems significantly. The increasing effect of deltaic subsidence, which is due to the removal of gas, oil, and water from deltas, will also increase

1368-462: The virtually impassable Lachine Rapids , the St. Lawrence was once continuously navigable only as far as Montreal. Opened in 1825, the Lachine Canal was the first to allow ships to pass the rapids. An extensive system of canals and locks, known as the St. Lawrence Seaway , was officially opened on 26 June 1959 by Elizabeth II (representing Canada) and President Dwight D. Eisenhower (representing

1406-415: Was Jacques Cartier . At that time, the land along the river described as "about two leagues, a mountain as tall as a heap of wheat" was inhabited by the St. Lawrence Iroquoians . During Cartier's second voyage in 1535, because Cartier arrived in the estuary on Saint Lawrence 's feast day 10 August, he named it the Gulf of Saint Lawrence . The St. Lawrence River is today partly within the U.S. and as such

1444-460: Was recorded on a map by Samuel de Champlain Champlain opted for the names Grande riviere de sainct Laurens and Fleuve sainct Laurens in his writings, supplanting the earlier names. In contemporary French, the name is rendered as the fleuve Saint-Laurent . The name Saint-Laurent (Saint Lawrence) was originally applied to the eponymous bay by Jacques Cartier upon his arrival into the region on

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