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Saltstraumen is a small strait with one of the strongest tidal currents in the world. It is located in the municipality of Bodø in Nordland county, Norway. It is located about 10 km (6.2 mi) southeast of the town of Bodø. The narrow channel connects the outer Saltfjorden to the large Skjerstad Fjord between the islands of Straumøya and Knaplundsøya. The Saltstraumen Bridge on Norwegian County Road 17 crosses Saltstraumen. [1]
Saltstraumen has one of the strongest tidal currents in the world. [2] [3] Up to 400 million cubic metres (110 billion US gallons) of seawater [4] forces its way through a 3 km (1.9 mi) long and 150 m (490 ft) wide strait every six hours. [5] Vortices known as whirlpools or maelstroms up to 10 m (33 ft) in diameter and 5 m (16 ft) in depth are formed when the current is at its strongest. At this point, one source claims that the tidal current can reach 40 km/h (25 mph). [6]
Saltstraumen has existed for about two to three thousand years. Before that, the area was different due to post-glacial rebound. The current is created when the tide tries to fill Skjerstad Fjord. The height difference between the sea level and the fjord inside can be up to 1 m (3 ft 3 in). When the current turns, there is a period when the strait is navigable. [3]
The above account of the Saltstraumen is rather different than what The Norwegian Pilot reports. [7] The Pilot’s description of the normal current is based on the time of the high tide at Bodø. The greatest southbound current occurs about one and a quarter hours before Bodø high tide, when the inflowing current reaches about 7 knots (13 kilometres per hour). The speed of the current has a broad maximum being greater than 6 kn (11 km/h) from three hours before Bodø high tide until half an hour after Bodø high tide. The greatest northbound current occurs about four and a half hours after Bodø high tide, when the outflowing current reaches over 8 kn (15 km/h). The speed of this current also has a broad maximum being above six knots from two hours and forty minutes after Bodø high tide until five and a half hours before the next Bodø high tide. The behavior of the current may differ from normal due to strong winds or when more fresh water than usual is entering into the fjord from the surrounding mountains.
Saltstraumen is popular with anglers, due to its abundance of fish such as saithe, cod, wolffish, rose fish, and halibut. Coalfish is a specialty of the area. The largest documented coalfish of 22.7 kg (50 lb) was caught in Saltstraumen on a fishing rod. [8]
Eiders are the only birds capable of diving for mussels in the strong stream. [9] [10]
The first element is the name of the district Salten and the last element is the definite form of straum, meaning "stream" or "water flow".
The remains of a 10,000-year-old hunter settlement in the area are the oldest known traces of human settlement in Bodø, and also one of the oldest archaeological discoveries in Norway. These hunters lived on the edge of the ice, attracted by the abundance of fish caused by the strong currents.
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and are also caused by the Earth and Moon orbiting one another.
In physical geography, a fjord or fiord is a long, narrow inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Antarctica, British Columbia, Chile, Denmark, Germany, Greenland, the Faroe Islands, Iceland, Ireland, Kamchatka, the Kerguelen Islands, Labrador, Newfoundland, New Zealand, Norway, Novaya Zemlya, Nunavut, Quebec, the Patagonia region of Argentina and Chile, Russia, South Georgia Island, Tasmania, Scotland and Washington state. Norway's coastline is estimated to be 29,000 km (18,000 mi) long with its nearly 1,200 fjords, but only 2,500 km (1,600 mi) long excluding the fjords.
Nordland is a county in Norway in the Northern Norway region, the least populous of all 11 counties, bordering Troms og Finnmark in the north, Trøndelag in the south, Norrbotten County in Sweden to the east, Västerbotten County to the south-east, and the Atlantic Ocean to the west. The county was formerly known as Nordlandene amt. The county administration is in the town of Bodø. The remote Arctic island of Jan Mayen has been administered from Nordland since 1995. In the southern part of the county is Vega, listed on the UNESCO World Heritage Site list.
Bodø is a municipality in Nordland county, Norway. It is part of the traditional region of Salten. The administrative centre of the municipality is the town of Bodø. Some of the notable villages in Bodø include Misvær, Skjerstad, Saltstraumen, Løding, Løpsmarka, Kjerringøy, Sørvær, and Fenes.
The Menai Strait is a narrow stretch of shallow tidal water about 25 km (16 mi) long, which separates the island of Anglesey from the mainland of Wales. It varies in width from 400 metres (1,300 ft) from Fort Belan to Abermenai Point to 1,100 metres (3,600 ft) from Traeth Gwyllt to Caernarfon Castle. It then narrows to 500 metres (1,600 ft) in the middle reaches and then it broadens again. At Bangor, Garth Pier, it is 900 metres (3,000 ft) wide. It then widens out, and the distance from Puffin Island to Penmaenmawr is about 8 kilometres (5.0 mi).
A whirlpool is a body of rotating water produced by opposing currents or a current running into an obstacle. Small whirlpools form when a bath or a sink is draining. More powerful ones formed in seas or oceans may be called maelstroms. Vortex is the proper term for a whirlpool that has a downdraft.
Lofoten is an archipelago and a traditional district in the county of Nordland, Norway. Lofoten has distinctive scenery with dramatic mountains and peaks, open sea and sheltered bays, beaches and untouched lands. There are two towns, Svolvær and Leknes – the latter is approximately 169 km (105 mi) north of the Arctic Circle and approximately 2,420 km (1,500 mi) away from the North Pole. The archipelago experiences one of the world's largest elevated temperature anomalies relative to its high latitude.
The Naruto whirlpools are tidal whirlpools in the Naruto Strait, a channel between Naruto in Tokushima and Awaji Island in Hyōgo, Japan. The strait between Naruto and Awaji island has a width of about 1.3 km. The strait is one of the connections between the Pacific Ocean and the Inland Sea, a body of water separating Honshū and Shikoku, two of the main islands of Japan. The tide moves large amounts of water into the Inland Sea twice a day and also removes large amounts of water twice a day. With a range of up to 1.7 m (5.6 ft), the tide creates a difference in the water level of up to 1.5 m between the Inland Sea and the Pacific. Due to the narrowness of the strait, the water rushes through the Naruto channel at a speed of about 13–15 km/h (8–9 mph) four times a day, twice flowing in and twice flowing out. During a spring tide, the speed of the water may reach 20 km/h (12 mph), creating vortices up to 20 m (66 ft) in diameter.
Tidal race or tidal rapid is a natural occurrence whereby a fast-moving tide passes through a constriction, resulting in the formation of waves, eddies and hazardous currents. The constriction can be a passage where the sides narrow, for example the Gulf of Corryvreckan and the Saltstraumen maelstrom, or an underwater obstruction, such as is found at the Portland Race in the United Kingdom.
Slack water is a short period in a body of tidal water when the water is completely unstressed, and there is no movement either way in the tidal stream, and which occurs before the direction of the tidal stream reverses. Slack water can be estimated using a tidal atlas or the tidal diamond information on a nautical chart. The time of slack water, particularly in constricted waters, does not occur at high and low water, and in certain areas, such as Primera Angostura, the ebb may run for up to three hours after the water level has started to rise. Similarly, the flood may run for up to three hours after the water has started to fall. In 1884, Thornton Lecky illustrated the phenomenon with an inland basin of infinite size, connected to the sea by a narrow mouth. Since the level of the basin is always at mean sea level, the flood in the mouth starts at half tide, and its velocity is at its greatest at the time of high water, with the strongest ebb occurring conversely at low water.
Skookumchuck Narrows is a strait forming the entrance of Sechelt Inlet on British Columbia's Sunshine Coast in Canada. Before broadening into Sechelt Inlet, all of its tidal flow together with that of Salmon Inlet and Narrows Inlet must pass through Sechelt Rapids. At peak flows, standing waves, whitecaps, and whirlpools form at the rapids even in calm weather. The narrows are also the site of Skookumchuck Narrows Provincial Park.
Northern Norway is a geographical region of Norway, consisting of the two northernmost counties Nordland and Troms og Finnmark, in total about 35% of the Norwegian mainland. Some of the largest towns in Northern Norway are Mo i Rana, Bodø, Narvik, Harstad, Tromsø and Alta. Northern Norway is often described as the land of the midnight sun and the land of the northern lights. Further north, halfway to the North Pole, is the Arctic archipelago of Svalbard, traditionally not regarded as part of Northern Norway.
Salten is a traditional district in Nordland county, Norway. It includes the municipalities of Meløy, Gildeskål, Bodø, Beiarn, Saltdal, Fauske, Sørfold, Steigen, and Hamarøy. Salten covers an area of about 9,354 square kilometres (3,612 sq mi) and has a population (2016) of about 73,375 people.
The Gulf of Corryvreckan, also called the Strait of Corryvreckan, is a narrow strait between the islands of Jura and Scarba, in Argyll and Bute, off the west coast of mainland Scotland.
The Moskstraumen or Moskenstraumen is a system of tidal eddies and whirlpools, one of the strongest in the world, that forms at the Lofoten archipelago in Nordland county, Norway between the Norwegian Sea and the Vestfjorden. It is located between the Lofoten Point on the island of Moskenesøya and the island of Mosken. Moskstraumen is unusual in that it occurs in the open sea whereas most other whirlpools are observed in confined straits or rivers. It originates from a combination of several factors, the dominant being the strong semi-diurnal tides and peculiar shape of the seabed, with a shallow ridge between the Moskenesøya and Værøya islands which amplifies and whirls the tidal currents.
Drammensfjord is a fjord in Norway that connects to Ytre Oslofjord on the west side. It stretches to the north and northeast. The Drammenselva river discharges into the head of the fjord. The municipality and city of Drammen which is named after the fjord is also found there.
New Zealand has large ocean energy resources but does not yet generate any power from them. TVNZ reported in 2007 that over 20 wave and tidal power projects are currently under development. However, not a lot of public information is available about these projects. The Aotearoa Wave and Tidal Energy Association was established in 2006 to "promote the uptake of marine energy in New Zealand". According to their 10 February 2008 newsletter, they have 59 members. However, the association doesn't list its members.
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Saltfjorden or Saltenfjorden is a fjord in the municipalities of Bodø and Gildeskål in Nordland county, Norway. The 40-kilometre (25 mi) long fjord begins around the Fleinvær islands; travels northeast past the islands of Sørarnøya, Sandhornøya, and Straumøya islands; along the southern shores of the town of Bodø; and ends at the village of Løding.
Svalbard Minute by Minute is a 221-hour-long 2020 Norwegian slow television broadcast that aired on NRK2 between 31 January at 18:00 to 9 February at 23:59 (CET). The broadcast shows the MS Spitsbergen's nine-day voyage around Spitsbergen, the only permanently-inhabited island of Svalbard, which commemorated the 100-year anniversary of the Svalbard Treaty, a treaty signed on 9 February 1920 which gave Norway sovereignty over Svalbard. Lasting a total of 13,319 minutes, it is NRK's longest slow television broadcast as of February 2022.