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Qinnguata Kuussua
Qinnguata Kuussua is a river in a valley of the same name in the Qeqqata municipality in central-western Greenland. Its source is a large meltwater outflow from Russell Glacier flowing from the Greenland Ice Sheet. It is the main river in the Kangerlussuaq area. For most of its run, the river is very wide, up to in the upper reaches. The climate is polar continental, with the area receiving very little rainfall. Geography Several meltwater outflow streams from the southern base of the Russell Glacier () form the Qinnguata Kuussua river. The valley is long, oriented east-south-east to west-north-west. From the north it is bounded by an exposed, barren, and flattened ridge of Akuliarusiarsuk. From the south, the river valley is delimited by a sequence of tundra ranges, culminating in Tasersuatsiaap Kinginnera at , and petering out near Kangerlussuaq in the form of a low, wide ridge of Qaarsorsuaq. The lower part of the valley narrows down in the gorge between Akuliarusiarsu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kangerlussuaq Fjord
Kangerlussuaq Fjord (old spelling: ''Kangerdlugssuaq'', da, Søndre Strømfjord) is a long fjord in the Qeqqata municipality in central-western Greenland. The fjord is long and between and wide, flowing from the estuary of Qinnguata Kuussua river to the southwest, and emptying into the Davis Strait. It is the longest fjord of western Greenland. Geography The head of the fjord is located at , at the estuary of the Qinnguata Kuussua river flowing from the Russell Glacier of the Greenland ice sheet ( kl, Sermersuaq). The fjord mouth is located at , south of the Simiutaq Island. Another, smaller waterway connects to the sea to the north of the island.Maniitsoq, Saga Map, Tage Schjøtt, 1992 Kangerlussuaq Fjord does not have any tributary fjords, with a fairly uniform coastline. Small hills of the Kangaamiut dike swarm, such as the highlands of Tarajornitsut, dominate the coast of the inner parts of the fjord, transforming into steep mountain ranges towards the mouth. In that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flood
A flood is an overflow of water ( or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are an area of study of the discipline hydrology and are of significant concern in agriculture, civil engineering and public health. Human changes to the environment often increase the intensity and frequency of flooding, for example land use changes such as deforestation and removal of wetlands, changes in waterway course or flood controls such as with levees, and larger environmental issues such as climate change and sea level rise. In particular climate change's increased rainfall and extreme weather events increases the severity of other causes for flooding, resulting in more intense floods and increased flood risk. Flooding may occur as an overflow of water from water bodies, such as a river, lake, or ocean, in which the water overtops or breaks levees, resulting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drainage Basin
A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the '' drainage divide'', made up of a succession of elevated features, such as ridges and hills. A basin may consist of smaller basins that merge at river confluences, forming a hierarchical pattern. Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, and impluvium. In North America, they are commonly called a watershed, though in other English-speaking places, "watershed" is used only in its original sense, that of a drainage divide. In a closed drainage basin, or endorheic basin, the water converges to a single point inside the basin, known as a sink, which may be a permanent lake, a dry lake, or a point where surface water is lost underground. Drainage basins are similar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estuary
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime 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 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, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quicksand
Quicksand is a colloid A colloid is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance. Some definitions specify that the particles must be dispersed in a liquid, while others extend ... consisting of fine granular material (such as sand, silt or clay) and water. It forms in saturated loose sand when the sand is suddenly agitated. When water in the sand cannot escape, it creates a Liquefaction, liquefied soil that loses strength and cannot support weight. Quicksand can form in standing water or in upward flowing water (as from an Artesian aquifer, artesian spring). In the case of upward flowing water, effective stress, forces oppose the force of gravity and suspend the soil particles. The saturated sediment may appear quite solid until a sudden change in pressure or shock initiates liquefaction. This causes the sand to form a suspension and lose strength. The cushioning of water gives quic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silt
Silt is granular material of a size between sand and clay and composed mostly of broken grains of quartz. Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water. Silt usually has a floury feel when dry, and lacks plasticity when wet. Silt also can be felt by the tongue as granular when placed on the front teeth (even when mixed with clay particles). Silt is a common material, making up 45% of average modern mud. It is found in many river deltas and as wind-deposited accumulations, particularly in central Asia, north China, and North America. It is produced in both very hot climates (through such processes as collisions of quartz grains in dust storms) and very cold climates (through such processes as glacial grinding of quartz grains.) Loess is soil rich in silt which makes up some of the most fertile agricultural land on Earth. However, silt is very vulnerable to erosion, and it has poor mechanical properties, making construction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Outwash Plain
An outwash plain, also called a sandur (plural: ''sandurs''), sandr or sandar, is a plain formed of glaciofluvial deposits due to meltwater outwash at the terminus of a glacier. As it flows, the glacier grinds the underlying rock surface and carries the debris along. The meltwater at the snout of the glacier deposits its load of sediment over the outwash plain, with larger boulders being deposited near the terminal moraine, and smaller particles travelling further before being deposited. Sandurs are common in Iceland where geothermal activity accelerates the melting of ice flows and the deposition of sediment by meltwater. Formation Sandurs are found in glaciated areas, such as Svalbard, Kerguelen Islands, and Iceland. Glaciers and icecaps contain large amounts of silt and sediment, picked up as they erode the underlying rocks when they move slowly downhill, and at the snout of the glacier, meltwater can carry this sediment away from the glacier and deposit it on a broad plai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Confluence
In geography, a confluence (also: ''conflux'') occurs where two or more flowing bodies of water join to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river (main stem); or where two streams meet to become the source of a river of a new name (such as the confluence of the Monongahela and Allegheny rivers at Pittsburgh, forming the Ohio); or where two separated channels of a river (forming a river island) rejoin at the downstream end. Scientific study of confluences Confluences are studied in a variety of sciences. Hydrology studies the characteristic flow patterns of confluences and how they give rise to patterns of erosion, bars, and scour pools. The water flows and their consequences are often studied with mathematical models. Confluences are relevant to the distribution of living organisms (i.e., ecology) as well; "the general pattern ownstream of confluencesof increasing stream flow and decreasing s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bluie West Eight
Sondrestrom Air Base, originally Bluie West-8, was a United States Air Force base in central Greenland. The site is located north of the Arctic Circle and from the northeast end of Kangerlussuaq Fjord (formerly known by its Danish name ''Søndre Strømfjord''). The base is approximately west-northwest of Ravneklippen and east of Sisimiut. Following World War II, the base was briefly returned to Danish control between 9 October 1950 and 20 July 1951. The 1951 Greenland bases treaty led to the return of Sondrestrom to American control. The base was turned over to the Greenland government in 1992 and is now the civilian community of Kangerlussuaq and Kangerlussuaq Airport, although the USAF operates a small Air National Guard detachment in the former base. History Names * Established on 20 October 1941 and named Bluie West Eight (BW-8); codenamed "Bodkin" in communications. : Renamed: Sondrestromfjord Army Air Base, 1945 : Renamed: Sondrestromfjord Air Base, 25 October 1947 : ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akuliarusiarsuup Kuua
Akuliarusiarsuup Kuua ( da, Sandflugtdalen) is a river and valley of the same name in the Qeqqata municipality in central-western Greenland. Its source is the meltwater outflow from Russell Glacier, an outflow of the Greenland ice sheet. The river is a tributary of Qinnguata Kuussua, the main river in the Kangerlussuaq area. For most of its run, the river flows very slowly through the sandur basin of the valley, forming meanders amongst large fields of glacial silt quicksand. The climate is polar continental, with the area receiving very little rainfall. Geography Several meltwater outflow streams from the base of the Russell Glacier () form the Akuliarusiarsuup Kuua river. The valley is long, oriented east-north-east to west-south-west. From the north it is bounded by a low-lying (300-400m) ridge − part of the Kangaamiut dike swarm − separating it from large glacial lakes of Aajuitsup Tasia and Sanningasoq. On the southern side the boundary is formed by an exposed, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
