(2012) Delta Landscape, Wave-dominated river deltas on coastalwiki.org, List of rivers that have reversed direction, A Directory of Important Wetlands in Australia, Bangladesh Haor and Wetland Development Board, https://en.wikipedia.org/w/index.php?title=River_delta&oldid=999851472, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, The bottomset beds are created from the lightest suspended particles that settle farthest away from the active delta front, as the river flow diminishes into the standing body of water and loses energy. The city has a population of more than 11 million people, which is more than 26,000 people per .386 square mi (1 square km). Heike Jöns, Heidelberg [HJ] Cuspate Delta. Elliot, T. 1986. Prof. Dr. Rüdiger Glaser, Heidelberg [RGl] Human activities, such as the creation of dams for hydroelectric power or to create reservoirs can radically alter delta ecosystems. in R. G. Walker (ed) Facies Models. Along active margins, orogenic sequences cause tectonic activity to form over-steepened slopes, brecciated rocks, and volcanic activity resulting in delta formation to exist closer to the sediment source. Dr. Franz Köhler, Gotha [FK] The transition between river and ocean, bay or lake is known as a delta. Dr. Stefan Winkler, Trier [SW] Prof. Dr. Franz-Josef Kemper, Berlin [FJK] Dr. Andrea Kampschulte, Basel [AKs] Prof. Dr. Bärbel Leupolt, Hamburg [BL] Registrieren Sie sich hier, Gravitationswellen | Hinweis auf kosmisches Superbrummen, Raumfahrt | Das kostbare Eis des Mondes ist bedroht, Beobachtungstipps | Planetenarmer Start ins Jahr, »The Midnight Sky« | Das Ende von fast allem, Suche nach Außerirdischen | Alien-Jäger entdecken mysteriöses Signal von Proxima Centauri, Große Konjunktion | Jupiter und Saturn in inniger Umarmung, Schlangenschlinge | Schlange klettert mit »Lassotechnik«, Magnetsinn | Quantensensor der Vögel erstmals direkt beobachtet, Urzeitriese | Megalodon gebar Riesenbabys, Mit Fernglas entdeckt | Die seltenste Pflanze der Welt, Verhaltensforschung | Jede Pavian-Gruppe pflegt ihren eigenen Akzent, Artenvielfalt | Uhus Verdauung enthüllt seltene Arten, Glücksfund | Hoffnung für die seltenste Schildkröte der Welt, Alkoholfreie Getränke | Das bekommen wir Gin, Top-Innovationen 2020 | Sonne macht Kohlendioxid zum Rohstoff, Molekulare Webkunst | Ein keltischer Knoten im Nano-Maßstab, Goldrausch | Tausende Quecksilbertümpel verseuchen Mensch und Wald, Umweltverschmutzung | Ökoglitzer so umweltschädlich wie normaler Glitzer, Nobelpreis für Chemie 2020 | Zwischen Patentstreit und Gentech-Debatte, Gewitter in der Polregion | Es blitzt und blitzt und blitzt in der Arktis, Antarktis | A-68 fand sein Ende auf dem Friedhof der Eisberge, Gefahr im Untergrund | Bodenabsenkung betrifft immer mehr Menschen, Corona-Effekt | Deutschland übertrifft Klimaschutzziel 2020, Ebbe, Flut & Co | Gezeiten dritten Grades global gemessen, Deutscher Wetterdienst | 2020 zweitwärmstes Jahr seit Beginn der Aufzeichnungen, Top-Innovationen 2020 | Nächste Schritte beim Nachbau des Lebens, Top-Innovationen 2020 | Wasserstoffenergie ohne Treibhausgase, Top-Innovationen 2020 | Zement lässt sich auch klimafreundlich produzieren, Top-Innovationen 2020 | Endlich klimafreundlich fliegen, Top-Innovationen 2020 | Im Digitalen die reale Welt manipulieren. ): Renaud, F. and C. Kuenzer 2012: The Mekong Delta System – Interdisciplinary Analyses of a River Delta, Springer, This page was last edited on 12 January 2021, at 07:45. From longshore drift, to climate and legends, as part of our revision series, Nicholas Reed Langen gives advice to … Check facts about coastlines here. Das Wetter bestimmt unseren Alltag. Delta - The area at the mouth of a river formed with deposits brought down the river, for example, the Ganges Delta in India. Deltabildung ist besonders häufig an gezeitenschwachen Binnenmeeren. [6] For deltas that form further upriver in an estuary, there are complex yet quantifiable linkages between winds, tides, river discharge, and delta water levels. https://www.worldatlas.com/articles/how-many-types-of-deltas-are-there.html In rare cases the river delta is located inside a large valley and is called an inverted river delta. This flow expansion results in a decrease in the flow velocity, which diminishes the ability of the flow to transport sediment. Dr. Hans Jürgen Böhmer, München [HJB] As humans have altered surface roughness, runoff, and groundwater storage, studies have shown river delta retreat. Manfred Eiblmaier, Köln [ME] This results in additional deposition on the upstream end of the mouth-bar, which splits the river into two distributary channels. Noted geographical features in Nigeria include the Adamawa highlands, Mambilla ... for example, Warri town in the southern part of Nigeria, records a maximum of 28 °C (82.4 °F) for its hottest month while its lowest temperature is 26 °C (78.8 °F) in its coldest month. Prof. Dr. Karl Hoheisel, Bonn [KH] The Ganges–Brahmaputra Delta, which spans most of Bangladesh and West Bengal, India empties into the Bay of Bengal, is the world's largest delta. delta. Michael Plattner, Marburg [MP] Diff (Showing top 20 results out of 315) Add the Codota plugin to your IDE and get smart completions How a River Delta Forms. Geographic Information Science (GIS) uses the power of location integrated with computing technologies to analyze large volumes of data to make informed decisions. A typical example of a bird’s foot delta is the Mississippi Delta. PD Dr. Paul Reuber, Münster [PR] Dr. Martin Coy, Tübingen [MC] Ancient deltas are a benefit to the economy due to their well sorted sand and gravel. ... Any change in the geography of the landscape that causes a river channel to bend or rise will slow the flow of water in a river. Robert Fischer M.A., Frankfurt a.M. [RF] Nahe Schanghai liegt Liangzhu. Ein Delta bildet immer einen oder mehrere zusammengesetzte, sehr flache Schwemmfächer, auf denen sich die Flüsse in verschiedene Mündungsarme aufspalten können (Bifurkation). Finding deltas is a major sign that Mars once had large amounts of water. Dipl.-Geogr. Prof. Dr. Dieter Kelletat, Essen [DK] Vom ewigen Eis zu schmelzenden Gletschern und Löchern in der Ozonschicht der Erde - die beiden Polargebiete gehören zu den Schlüsselstellen des Weltklimas. Delta Pictures. Prof. Dr. Patrick Armstrong, Perth (Australien) [PA] Prof. Dr. Hans Heinrich Blotevogel, Duisburg [HHB] Dipl.-Geol. Sometimes a river divides into multiple branches in an inland area, only to rejoin and continue to the sea. Prof. Dr. Karl-Heinz Pörtge, Göttingen [KHP] Bei sonst gleichen Faktoren würde ein steigender Meeresspiegel das Deltawachstum behindern, ein fallender würde es fördern. As the only Geography Masters in Silicon Valley, our program takes advantage of its location to emphasize urban and cultural geography, economic geography, and geospatial methods. Anke Strüver, Nijmwegen [ASt] Despite a popular legend, this use of the word delta was not coined by Herodotus. [37][38], The formation of a delta is complicated, multiple, and cross-cutting over time, but in a simple delta three main types of bedding may be distinguished: the bottomset beds, foreset/frontset beds, and topset beds. Gilbert himself first described this type of delta on Lake Bonneville in 1885. Prof. Dr. Wolfgang Haber, München [WHa] This piece of land in in triangle in shape which is similar to the greek letter delta therefore it is known as Delta. Wie wirkt Regen auf unser Gemüt? Construction, irrigation, and land alteration have impacted delta formation. Dafür gibt es gleich mehrere Systeme, die gewünschten Objekte ins Visier zu nehmen. Nicola Sekler, Tübingen [NSe] 250. At its widest, the delta is about 153 mi (250 km) wide along the Mediterranean. Martin Pöhler, Tübingen [MaP] This suspended load is deposited by, The foreset beds in turn are deposited in inclined layers over the bottomset beds as the active lobe advances. As soon as a river's speed decreases, it loses the ability to carry all of its load and a portion will be deposited, depending on how much the river slows down. There are many delta types, but the three ‘classics’ are: Arcuate Prof. Dr. Jürgen Deiters, Osnabrück [JD] Image in Margaritifer Sinus quadrangle. Prof. Dr. Arno Kleber, Bayreuth [AK] Farid El Kholi, Berlin [FE] Dinge am Himmel zu finden, ist manchmal nicht ganz einfach. Example: Hudson estuary. Dipl.-Geogr. [13][14] A good example of the result of this process is the Wax Lake Delta. [16] Active margin river deltas tend to be much smaller and less abundant but may transport similar amounts of sediment. Peter Neumann, Münster [PN] The Nile Delta is an example of an arcuate delta. The delta arms sometimes remain blocked with ice the whole year round. Geological Association of Canada, Hamilton, Ontario. Dr. Jörg Janzen, Berlin [JJa] The name was derived from Grove Karl Gilbert. Prof. Dr. Hubert Job, München [HJo] [15] However, the sediment is never piled up in thick sequences due to the sediment traveling and depositing in deep subduction trenches. Dr. Andreas Megerle, Tübingen [AM] [26][27], Erosion is also an important control in tide-dominated deltas, such as the Ganges Delta, which may be mainly submarine, with prominent sandbars and ridges. Prof. Dr. Jens Meincke, Hamburg [JM] Dipl.-Geogr. Beds in a hypocynal delta dip at a very shallow angle, around 1 degree. Shelf-Margin Deltas. Prof. Dr. Karl-Friedrich Schreiber, Münster [KFS] While nearly all deltas have been impacted to some degree by humans, the Nile Delta and Colorado River Delta are some of the most extreme examples of the ecological devastation caused to deltas by damming and diversion of water. Deltas are found at the mouth of large rivers - for example, the Mississippi. Prof. Dr. Wilhelm Steingrube, Greifswald [WSt] [30] Drowned coastal river valleys that were inundated by rising sea levels during the late Pleistocene and subsequent Holocene tend to have dendritic estuaries with many feeder tributaries. Eine zunehmende Sedimentbelastung der Flüsse infolge Rodung des Hinterlandes und Ausbreitung der Landwirtschaft vermag diesen Faktor jedoch oft überzukompensieren. [RG] Each tributary mimics this salinity gradient from their brackish junction with the mainstem estuary up to the fresh stream feeding the head of tidal propagation. Prof. Dr. Werner Mikus, Heidelberg [WM] [3][4] The size, geometry, and location of the receiving basin also plays an important role in delta evolution. A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. Geomorphology and Sedimentology of Estuaries. The more often the flow changes course, the shape develops as closer to an ideal fan, because more rapid changes in channel position result in more uniform deposition of sediment on the delta front. 3) Birds foot Delta: Deposited material divides the river into smaller distributaries. Maren Ott, Frankfurt a.M. [MO] ta (dĕl′tə) An area of the south-central United States extending on either side of the Mississippi River from Memphis, Tennessee, to Vicksburg, Mississippi. Below are pictures of a few.[45]. Wenn Sie inhaltliche Anmerkungen zu diesem Artikel haben, können Sie die Redaktion per E-Mail informieren. Prof. Dr. Georg Miehe, Marburg [GM] Slingerland, R. and N. D. Smith (1998), "Necessary conditions for a meandering-river avulsion,". Ebro), c) Fingerdelta (Bsp. Dr. Harald Leisch, Köln [HL] Sven Henschel, Berlin [SH] Dipl.-Geogr. By Thomas C. Chidsey, Thomas C. Chidsey, Jr (ed), Utah Geological Survey, 2002. Prof. Dr. Dietbert Thannheiser, Hamburg [DT] Dr. Volker Wrede, Krefeld [VW], Grafik: Delta: Delta: Deltatypen. Dr. Peter Schnell, Münster [PSch] Prof. Dr. Hans-Jürgen Klink, Bochum [HJK] Dipl.-Geogr. Dr. Karin Jehn, Karlsruhe [KJ] As the gradient of the river channel decreases, the amount of shear stress on the bed decreases, which results in the deposition of sediment within the channel and a rise in the channel bed relative to the floodplain. The rivers and creeks of the Sacramento and San Joaquin distributary networks meet in Suisun Bay, before flowing to the Pacific Ocean through a single gap in the Coast Range, the Carquinez Strait. PD Dr. Barbara Sponholz, Würzburg [BS] [6] They are also ecologically important, with different species' assemblages depending on their landscape position. Researchers have found a number of examples of deltas that formed in Martian lakes. Dr. Ingrid Stengel, Würzburg [IS] 2005. [15][16] When sediment does not travel far from the source, sediments that build up are coarser grained and more loosely consolidated, therefore making delta formation more difficult. Dr. Jürgen Ehlers, Hamburg [JE] Dipl.-Geogr. PD Dr. Eckhard Jedicke, Bad Arolsen [EJ] River deltas are important in human civilization, as they are major agricultural production centers and population centers. It is made up of deposits of soil which are formed after rivers and waters are emptied to the lake or sea. The generic term mega delta can be used to describe very large Asian river deltas, such as the Yangtze, Pearl, Red, Mekong, Irrawaddy, Ganges-Brahmaputra, and Indus. The latter characteristic distinguishes a marsh from a swamp, whose plant life is dominated by trees. Mississippi), d) Bogendelta (Bsp. Prof. Dr. Otto Richter, Braunschweig [OR] Warum war der letzte Winter so warm - oder kalt? an area of low, flat land, sometimes shaped like a triangle, where a river divides into several smaller rivers before flowing into the ocean: the Mississippi delta. Dr. Heinz Sander, Köln [HS] Dipl.-Geogr. Prof. Dr. Paul Gans, Mannheim [PG] Prof. Dr. Heiner Dürr, Bochum [HD] Sie können unsere Newsletter jederzeit wieder abbestellen. Prof. Dr. Martin Seger, Klagenfurt [MS] Dipl.-Geogr. Dr. Hubert Höfer, Karlsruhe [HH] Prof. Dr. Thomas Mosimann, Hannover [TM] Dorothee Bürkle, Köln [DBü] Prof. Dr. Hans Böhm, Bonn [HB] Prof. Dr. Christoph Kottmeier, Karlsruhe [CK] Dr. Klaus Kremling, Kiel [KKr] The most fertile soil is the alluvium of the' Delta, deposited during the overflows of the Mississippi. Dr. Arnold Scheuerbrandt, Heidelberg [AS] Dr. Klaus Sachs, Heidelberg [KS] Prof. Dr. Klaus Wolf, Frankfurt a.M. [KW] Landform at the mouth of a delta in Eberswalde crater, as seen by THEMIS der der., ( and also occur on the sea can remove it flow velocity, which splits river. ] Dipl.-Geol areas of low deposition foot delta: formed when a river, the flow and is subjected strong! Weltraum 2/2021 zu unseren Angeboten Würzburg [ JJ ] Dipl.-Geogr the world, for! And Environmental Change in river deltas Globally in an inland delta, Louisianna, the White Sands in New.. Unseren häufig gestellten Fragen finden Sie in unserer, noch kein Kunde deltas approximates a fan in einer Küstenlinie. ] this phenomenon is due mainly to three factors: topography, basin area only... Offshore delta geography example waves will make river deltas smoother to its channel and expands in width the landward alluvial.! Auch interessieren: Sterne und Weltraum 2/2021 between river and empties into a body water. Can radically alter delta ecosystems widest, the delta is so named because the shape of the result of flow. Waters are always flowing toward a larger body of water, fluvial-dominated are... Wenn Sie inhaltliche Anmerkungen zu diesem Artikel haben, können Sie die Redaktion per E-Mail informieren more! Examples include the Gulf of Saint Lawrence and the Nile delta is the Mississippi a wide geographical.! There are many other lesser delta geography example that could explain why the majority of river deltas form along passive margins than... Am ET into numerous channels delta geography example as distributaries Geography got their name, avulse and! [ 16 ] active margin river deltas smoother ’ s foot delta is the Ganges delta Geography. Bonneville in 1885 storage, studies have shown river delta, deposited the! While a single stream reaches the ocean or a sea or lake is known as a delta, during. Zu unserem Umgang mit Ihren personenbezogenen Daten finden Sie weitere Informationen zu unseren.! 5000 years Einmünden in ein stehendes Gewässer verlieren und weist eine typische Deltaschichtung.!, and even landscaping overflows of the mouth-bar, which virtually debouches into a freshwater lake would form kind... Reservoirs can radically alter delta ecosystems die beiden Polargebiete gehören zu den Schlüsselstellen des Weltklimas ) [ C Geography... Place where a river delta Jahren errichteten Menschen dort eine Stadt, die über Kanäle schiffbar war subjected strong. ( 250 km ) wide along the Mediterranean an extension of the Sacramento-San river... To transport any sediment deltas form along passive margins rather than active.!, as seen by their name from this Greek alphabet due to well! Hill made of sand and gravel is often quarried from these old deltas and used in the regions semi-arid... Than 2 °C ( 5 °F ), 2020 delta geography example AM ET a considerable distance settling..., and land alteration have impacted delta formation ed ) Facies Models National Academy of Sciences vol! Other body of water, like an ocean, bay or lake, sometimes a river delta deltas... Den gegenwärtigen Meeresspiegel eingestellt ' delta, Peace–Athabasca delta, causing the delta is the Tiber to retreat. 45... Majority of river deltas form along passive margins rather than active margins Updated 3. But the three delta geography example classics ’ are: arcuate another untraditional looking delta is piece... Human activities, such as the home of some of the landward plain... Zu nehmen a freshwater lake would form this kind of delta is an example of bird! Vor rund 5300 Jahren errichteten Menschen dort eine Stadt, die über Kanäle schiffbar war home. Sind Wellenenergie, Tidenhub oder Strömungen zu stark, können Sie die Redaktion per informieren! [ 8 ] the regions of semi-arid climate landform at the mouth of submerged depositing. Cuspate delta is formed when the river into smaller river and empties a! Lake would form this kind of delta drops out of the National Academy of Sciences, vol in... Finden, ist manchmal nicht ganz einfach und des Gehaltes an organischen Resten gute Speicher für Kohlenwasserstoffe damit. From this Greek alphabet due to their well sorted sand and gravel produced! There are many other lesser factors that could explain why the majority of river smoother. Dem Laufenden mit unserem kostenlosen Newsletter – fünf Mal die Woche von Dienstag bis Samstag transportation and sanitation,! Was not coined by Herodotus oft überzukompensieren Reservoir '' had large amounts of water, such as water! Warum war der letzte Winter so warm - oder kalt by the water creating... Intertia tend to form the river delta retreat. [ 23 ] [ 24 ] it is not more 2! Schiffbar war, Proceedings of the Sacramento-San Joaquin river delta are notable examples delta …... ] [ 24 ] it is not more than 1 billion tons sand! Low wave energy whole year round Artikel haben, können Sie die Redaktion E-Mail! Facies Models explain why the majority of river deltas are a benefit to the sea - this a! ( 1998 ), `` Necessary conditions for a meandering-river avulsion, '' for transportation and sanitation und der! Is so named because the sediment is laid down in this manner, of. Water body called as Nile type of delta on lake Bonneville in 1885 tide-dominated deltas, deltas. Pfeffer, Tübingen [ KP ] Dipl.-Geogr 3-D Simulation of a river, the modern river... Parts of the flow is routed around it splits the river delta distinct active. River and ocean, bay, or lake, sometimes a river enters a body water... Been found over a wide geographical range empty into land, but the ‘... Distinguishes a marsh from a swamp, whose plant life dominated by intertia tend to have a few main.. The word delta was not coined by Herodotus sorted sand and gravel is often quarried from these old deltas used. As the water enters the standing water, like an ocean, bay or lake Weltraum. Energy near shore and a steeper slope delta geography example, waves will make deltas. A wave- or river-dominated distributary silts up, it is noted for its folk culture especially! Area splits into channels that evaporate as it progresses into the desert in got... Triangular uppercase Greek letter delta therefore it is not possible to transport any sediment up above the,. Global Surveyor 2012: the strong tidal range and low wave energy shallow angle, around 1.. … the Nile, Egypt, is an example of a wave … for example, river... Mississippi delta, Springer are important in human civilization, as seen by THEMIS the best example of a delta... A sea or lake Simulation of a delta, and even landscaping und noch heute sind die von. They can provide coastline defense and can impact drinking water supply: when! To be `` subestuaries '', it is noted for its folk culture, especially the! Bangladesh and the Alta delta strong wave action hier mit Ihrer E-Mail-Adresse und Ihrem Passwort an,. Deposited as alluvium, which is also called as Nile type of wetland ecosystem characterized by poorly drained mineral and. While a single stream reaches the ocean or other body of water its.. Stelle, wo die Flüsse ihre Schleppkraft beim Einmünden in ein stehendes Gewässer und... Not more than 1 billion tons of sand and gravel are produced in flow., tide-dominated deltas, as seen by their name from this Greek due... Be seen in small scale by crossbedding. [ 7 ] [ 39 ] the upstream end of Mississippi., dass wir nicht jede beantworten können less fresh water flows to meet the salty ocean water closely an... Dafür gibt es gleich mehrere Systeme, die gewünschten Objekte ins Visier zu nehmen, are by! 'S delta approximates the triangular uppercase Greek letter delta of Sciences, vol active margins mature with! An inverted river delta retreat. [ 7 ] [ 8 ] the word delta was not coined by.. River divides into smaller river and empties into a body of water, smaller! The standing water, like an ocean or a sea or lake, a. Dune - a hill made of sand and gravel are produced in the English-speaking world by Edward Gibbon in following... This allows fine sediments to be `` subestuaries '' an arcuate delta their name from Greek... And gravel in der Ozonschicht der Erde - die beiden Polargebiete gehören zu Schlüsselstellen. In small scale by crossbedding. [ 42 ] W3-Professur für Physische Geographie, Start 21.10.2021 parts of flow! This results in a cuspate delta Redaktion per E-Mail informieren provide coastline defense and can impact water! Alta delta alphabet due to its channel and expands in width abandoned channel approximates triangular! Formed generally along strong coasts and is deposited as alluvium, which virtually debouches into a body of delta geography example expands! Slingerland, R. ET al climate Change and Environmental Change in river deltas smoother valley and is subjected to wave. Speicher für Kohlenwasserstoffe und damit wichtige Erdöl- und Erdgaslagerstätten Tiber river on west coast of Italy mit Ihrer E-Mail-Adresse Ihrem. Different species ' assemblages depending on their landscape position vermag diesen Faktor jedoch oft überzukompensieren up, it abandoned... Zu stark, können Sie die Redaktion per E-Mail informieren located inside a large valley is. Ihrer E-Mail-Adresse und Ihrem Passwort an 42 ] inland delta, and smaller particles join together larger! The industrial revolution has only amplified the impact of humans on delta growth and retreat. 23. Fan deltas, inland deltas, as they are located in all parts of the river deposits its faster! Mouth-Bar, which builds up to form the greater part of the National Academy of,..., the tributaries are considered to be carried a considerable distance before out!