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Pascua River
The Pascua River is a river located in the Aysén del General Carlos Ibáñez del Campo Region of Chile. In spite of being a short river, its drainage basin is the seventh-largest in the country due to the great size of the O'Higgins/San Martín Lake, its source. The Pascua River was discovered in 1898 by the German Hans Steffen, during the exploration of the area near Christmas time (''Pascua'' means Easter but is frequently used to describe Christmas in Chilean Spanish, thus explaining the origin of its name). The river has its source in the northern part of the north-west arm of the lake O'Higgins in the form of a small stream, in an area surrounded by steep-sided mountains that reach over 1,000 meters with glaciers spilling down to the lake or to the river. The river flows quickly forming rapids until it creates a cascade in the place where it falls into the Chico Lake. After leaving this lake, the river forms a new cascade and rushes furiously, preventing any type of naviga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
O'Higgins/San Martín Lake
The lake known as O'Higgins in Chile and San Martín in Argentina is located around coordinates in Patagonia, between the Aysén del General Carlos Ibáñez del Campo Region and the Santa Cruz Province. General information The lake has a surface area of , an elevation of above mean sea level, and a shoreline length of . Viewed from above, the lake consists of a series of finger-shaped flooded valleys, of which are in Chile and in Argentina, although sources differ on the precise split, presumably reflecting water level variability. The lake is the deepest in the Americas with a maximum depth of near O'Higgins Glacier, and its characteristic milky light-blue color comes from rock flour suspended in its waters. It is mainly fed by the Mayer River and other streams, and its outlet, the Pascua River, discharges water from the lake towards the Pacific Ocean at a rate of . The O'Higgins Glacier flows eastwards towards the lake, as does the Chico Glacier. Both of these glacie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baker Channel
Baker Channel, also known as Calen Inlet, is a channel of Chile located in the Tortel, Aysén del General Carlos Ibáñez del Campo Region. The Baker River discharges into Martinez Inlet, the northern part of this large estuary. It penetrates the mainland about and opens into Tarn Bay at the south-east corner of the Gulf of Penas. Merino Jarpa Island lies wholly within this great estuary, while at its mouth lies a group of smaller islands, called Baker Islands, which separate it from Messier Channel. Baker Channel also receives the waters of the O'Higgins/San Martín Lake through the Pascua River. The lake's far-reaching fjord-like arms extend approximately from lat. 49° 11' to 48° 22' S. Its north-west arm is that which drains into the mentioned river. The calving front of Jorge Montt Glacier, which is the northern glacier of the Southern Patagonian Ice Field, reaches the Baker Channel. A number of icebergs can be seen in this area. The channel marks the northern border ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continents of Asia and Oceania in the west and the Americas in the east. At in area (as defined with a southern Antarctic border), this largest division of the World Ocean—and, in turn, the hydrosphere—covers about 46% of Earth's water surface and about 32% of its total surface area, larger than Earth's entire land area combined .Pacific Ocean . '' Britannica Concise.'' 2008: Encyclopædia Britannica, Inc. The centers of both the |
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east and the Pacific Ocean to the west. Chile covers an area of , with a population of 17.5 million as of 2017. It shares land borders with Peru to the north, Bolivia to the north-east, Argentina to the east, and the Drake Passage in the far south. Chile also controls the Pacific islands of Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island in Oceania. It also claims about of Antarctica under the Chilean Antarctic Territory. The country's capital and largest city is Santiago, and its national language is Spanish. Spain conquered and colonized the region in the mid-16th century, replacing Inca rule, but failing to conquer the independent Mapuche who inhabited what is now south-central Chile. In 1818, after declaring in ... [...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] |
Hans Steffen
250px, Picture of Dr. Hans Steffen in 1916 Hans Steffen Hoffman (20 July 1865, in Fürstenwerder, Prussia – 7 April 1936, in Davos, Switzerland) was a German geographer and explorer of the Aysén Region in western Patagonia. Steffen also worked as a teacher, encyclopedist and historian. Steffen Glacier on the Northern Patagonian Ice Field is named after him. Biography In 1889, Hans Steffen, who had obtained his doctorate in 1886, was invited by José Manuel Balmaceda to Santiago, where he became a teacher of history and geography at the Instituto Pedagógico de Chile of the University of Chile (together with the Germans Alfred Beutell, Friedrich Hanssen, Friedrich Johow, Rudolf Lenz, Reinhold von Lilienthal, and Jürgen Heinrich Schneider). He was later contracted to join the Chilean boundary commission to explore areas disputed by Argentina in what is now the Aysén Region of Chile. The areas to be explored were those affected by article 1 of the Boundary treaty of 1881 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Easter
Easter,Traditional names for the feast in English are "Easter Day", as in the '' Book of Common Prayer''; "Easter Sunday", used by James Ussher''The Whole Works of the Most Rev. James Ussher, Volume 4'') and Samuel Pepys''The Diary of Samuel Pepys, Volume 2'') as well as the single word "Easter" in books printed i157515841586 also called Pascha (Aramaic, Greek, Latin) or Resurrection Sunday, is a Christian festival and cultural holiday commemorating the resurrection of Jesus from the dead, described in the New Testament as having occurred on the third day of his burial following his crucifixion by the Romans at Calvary . It is the culmination of the Passion of Jesus Christ, preceded by Lent (or Great Lent), a 40-day period of fasting, prayer, and penance. Easter-observing Christians commonly refer to the week before Easter as Holy Week, which in Western Christianity begins on Palm Sunday (marking the entrance of Jesus in Jerusalem), includes Spy Wednesday (on whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rapid
Rapids are sections of a river where the river bed has a relatively steep gradient, causing an increase in water velocity and turbulence. Rapids are hydrological features between a ''run'' (a smoothly flowing part of a stream) and a ''cascade''. Rapids are characterized by the river becoming shallower with some rocks exposed above the flow surface. As flowing water splashes over and around the rocks, air bubbles become mixed in with it and portions of the surface acquire a white color, forming what is called "whitewater". Rapids occur where the bed material is highly resistant to the erosive power of the stream in comparison with the bed downstream of the rapids. Very young streams flowing across solid rock may be rapids for much of their length. Rapids cause water aeration of the stream or river, resulting in better water quality. Rapids are categorized in classes, generally running from I to VI. A Class 5 rapid may be categorized as Class 5.1-5.9. While Class I rapids are eas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meander
A meander is one of a series of regular sinuous curves in the channel of a river or other watercourse. It is produced as a watercourse erodes the sediments of an outer, concave bank ( cut bank) and deposits sediments on an inner, convex bank which is typically a point bar. The result of this coupled erosion and sedimentation is the formation of a sinuous course as the channel migrates back and forth across the axis of a floodplain. The zone within which a meandering stream periodically shifts its channel is known as a meander belt. It typically ranges from 15 to 18 times the width of the channel. Over time, meanders migrate downstream, sometimes in such a short time as to create civil engineering challenges for local municipalities attempting to maintain stable roads and bridges.Neuendorf, K.K.E., J.P. Mehl Jr., and J.A. Jackson, J.A., eds. (2005) ''Glossary of Geology'' (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. Charlton, R., 2007. ''Fundamentals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsh
A marsh is a wetland that is dominated by herbaceous rather than woody plant species.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p Marshes can often be found at the edges of lakes and streams, where they form a transition between the aquatic and terrestrial ecosystems. They are often dominated by grasses, rushes or reeds. If woody plants are present they tend to be low-growing shrubs, and the marsh is sometimes called a carr. This form of vegetation is what differentiates marshes from other types of wetland such as swamps, which are dominated by trees, and mires, which are wetlands that have accumulated deposits of acidic peat. Marshes provide habitats for many kinds of invertebrates, fish, amphibians, waterfowl and aquatic mammals. This biological productivity means that marshes contain 0.1% of global sequestered terrestrial carbon. Moreover, they have an outsized influence on climate resi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peat
Peat (), also known as turf (), is an accumulation of partially decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. The peatland ecosystem covers and is the most efficient carbon sink on the planet, because peatland plants capture carbon dioxide (CO2) naturally released from the peat, maintaining an equilibrium. In natural peatlands, the "annual rate of biomass production is greater than the rate of decomposition", but it takes "thousands of years for peatlands to develop the deposits of , which is the average depth of the boreal orthernpeatlands", which store around 415 gigatonnes (Gt) of carbon (about 46 times 2019 global CO2 emissions). Globally, peat stores up to 550 Gt of carbon, 42% of all soil carbon, which exceeds the carbon stored in all other vegetation types, including the world's forests, although it covers just 3% of the land's surface. ''Sphagnum'' moss, also called peat moss, is one of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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