Fagherazzi S., 2008, Self-organization of tidal deltas, Proceedings of the National Academy of Sciences, vol. Prof. Dr. Karl Hofius, Boppard [KHo] Example: Hudson estuary. The main types of deltas are wave-dominated deltas, tide-dominated deltas, Gilbert deltas, inland deltas, and estuaries. Prof. Dr. Hans Gebhardt (Humangeographie) Prof. Dr. Wolfgang Haber, München [WHa] Delta is a piece of triangular land which is considered to be highly fertile. Jens Peter Scheller, Frankfurt a.M. [JPS] Sars-CoV-2 | Wessen Coronavirus-Strategie hat am besten funktioniert? Dr. Karin Wessel, Berlin [KWe] Prof. Dr. Andreas Kagermeier, Paderborn [AKa] 18.17), which is also called as Nile type of delta. Flocculation will also happen due to the salt in the water, and smaller particles join together into larger clumps. Dr. Thomas Breitbach, Köln [TB] Prof. Dr. Hans Hopfinger, Eichstätt [HHo] Prof. Dr. Yoram Bar-Gal, Haifa (Israel) [YBG] Prof. Dr. Manfred Meurer (Physische Geographie) [20], Fluvial-dominated deltas are further distinguished by the relative importance of the inertia of rapidly flowing water, the importance of turbulent bed friction beyond the river mouth, and buoyancy. Facts about Deltas 8: a Gilbert delta. the delta of … A river delta is so named because the shape of the Nile River's delta approximates the triangular uppercase Greek letter delta. From longshore drift, to climate and legends, as part of our revision series, Nicholas Reed Langen gives advice to … Examples of Deltas: The Mississippi Delta, Louisianna, The Nile, Egypt, Lough Leanne, Kerry. a) Spitzdelta (Bsp. [44] Making deltas a common location for civilizations to flourish due to access to flat land for farming, freshwater for sanitation and irrigation, and sea access for trade. Prof. Dr. Heiner Dürr, Bochum [HD] Prof. Dr. Carl Beierkuhnlein, Rostock [CBe] Examples from the Campanian Western Interior Seaway, U.S.A., are discussed by Mellere and Steel (1995, 2000) and by Steel. There are many other lesser factors that could explain why the majority of river deltas form along passive margins rather than active margins. Prof. Dr. Hans Heinrich Blotevogel, Duisburg [HHB] Prof. Dr. Reinhard Henkel, Heidelberg [RH] Cairo, the capital of EGYPT, is an example of a delta supporting a dense population. Dr. Martin Coy, Tübingen [MC] Sometimes, an area is created called a delta. Dipl.-Bibl. Prof. Dr. Peter Meusburger (Humangeographie) Formation of a delta Deltas can be found in any place where a river enters into another water body. Most large river deltas discharge to intra-cratonic basins on the trailing edges of passive margins due to the majority of large rivers such as the Mississippi, Nile, Amazon, Ganges, Indus, Yangtze, and Yellow River discharging along passive continental margins. Prof. Dr. Ingrid Hemmer, Eichstädt [ICH] Thomas Schwan, Heidelberg [TS] Heidi Megerle, Schlaitdorf [HM] Prof. Dr. Ernst Brunotte (Physische Geographie) [1][2] This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarely) another river that cannot carry away the supplied sediment. Channel abandonment has been frequent, with seven distinct channels active over the last 5000 years. Dr. Martina Fromhold-Eisebith, Seibersdorf [MFE] Prof. Dr. Jürgen Deiters, Osnabrück [JD] 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. Prof. Dr. Wolf Günther Koch [WK] et al. Prof. Dr. Hans Gebhardt, Heidelberg [HG] Dr. Martin Hartenstein, Karlsruhe [MHa] [15], Deltas are typically classified according to the main control on deposition, which is a combination of river, wave, and tidal processes,[17] depending on the strength of each. Christiane Martin (Leitung) Dr. Markus Berger, Braunschweig [MB] PD Dr. Rainer Duttmann, Hannover [RD] Examples include the Ganges delta in Bangladesh and the Nile delta in Egypt. Wenn Sie inhaltliche Anmerkungen zu diesem Artikel haben, können Sie die Redaktion per E-Mail informieren. 9. Kirsten Koop, Berlin [KK] Prof. Dr. Christoph Kottmeier, Karlsruhe [CK] Prof. Dr. Albrecht Steinecke, Paderborn [ASte] Thorsten Hülsmann, Bonn [TH] Image in Margaritifer Sinus quadrangle. Prof. Dr. Masahiro Kagami, Tokio [MK] Sven Henschel, Berlin [SH] Once a wave- or river-dominated distributary silts up, it is abandoned, and a new channel forms elsewhere. Delta in Margaritifer Sinus quadrangle as seen by THEMIS. 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. Prof. Dr. Hans Böhm, Bonn [HB] Geographie. Rhein-Maas-Delta vor seiner anthropogenen Veränderung). 2. Prof. Dr. Martin Seger, Klagenfurt [MS] Delta in Ismenius Lacus quadrangle, as seen by THEMIS. Such an area is called an inland delta, and often occurs on former lake beds. Delta Pictures. Dipl.-Geogr. Ebro), c) Fingerdelta (Bsp. Prof. Dr. Michael Richter, Erlangen [MR] Dipl.-Geogr. Prof. Dr. Ernst Brunotte, Köln [EB] Prof. Dr. Winfried Schenk, Tübingen [WS] Infos zu unserem Umgang mit Ihren personenbezogenen Daten finden Sie in unserer, Noch kein Kunde? Delta definition: A delta is an area of low , flat land shaped like a triangle , where a river splits and... | Meaning, pronunciation, translations and examples Dr. Karin Jehn, Karlsruhe [KJ] Maren Ott, Frankfurt a.M. [MO] PD Dr. Barbara Sponholz, Würzburg [BS] Reinhold Weinmann, Heidelberg [RW] The main river is bifurcated into numerous channels known as distributaries. PD Dr. Eckhard Jedicke, Bad Arolsen [EJ] Tim Freytag, Heidelberg [TM] As the deltaic lobe advances, the gradient of the river channel becomes lower because the river channel is longer but has the same change in elevation (see slope). Dipl.-Geogr. Prof. Dr. Patrick Armstrong, Perth (Australien) [PA] KUENZER C. and RENAUD, F. 2012: Climate Change and Environmental Change in River Deltas Globally. Sie können unsere Newsletter jederzeit wieder abbestellen. Dr. Max Seyfried, Karlsruhe [MSe] Some of the world's largest regional economies are located on deltas such as the Pearl River Delta, Yangtze River Delta, European Low Countries and the Greater Tokyo Area. Another way these distributary networks form is from the deposition of mouth bars (mid-channel sand and/or gravel bars at the mouth of a river). Dipl.-Geol. With a high wave energy near shore and a steeper slope offshore, waves will make river deltas smoother. Repeated channel-switching events build up a mature delta with a distributary network. Bernhard Köppen, Chemnitz [BK] Probable delta in Eberswalde crater, as seen by Mars Global Surveyor. [16] Active margin river deltas tend to be much smaller and less abundant but may transport similar amounts of sediment. Diff (Showing top 20 results out of 315) Add the Codota plugin to your IDE and get smart completions Dr. Thomas Scholten, Gießen [ThS] Prof. Dr. Rainer Glawion, Freiburg i. Br. Dr. Caroline Kramer, Heidelberg [CKr] It is made up of deposits of soil which are formed after rivers and waters are emptied to the lake or sea. Dorothee Bürkle Prof. Dr. Jürgen Hagedorn, Göttingen [JH] Dr. Joachim Vossen, Regensburg [JV] Dipl.-Geogr. Dipl.-Geogr. 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Dipl.-Geogr. Infos zu unserem Umgang mit Ihren personenbezogenen Daten finden Sie in unserer Datenschutzerklärung. Delta: [geographical name] municipality south and southeast of Vancouver in southwestern British Columbia, Canada population 99,863. As the river enters a body of water its velocity . Because the sediment is laid down in this fashion, the shape of these deltas approximates a fan. What might you find there? This allows fine sediments to be carried a considerable distance before settling out of suspension. Delta sentence examples. [15] However, the sediment is never piled up in thick sequences due to the sediment traveling and depositing in deep subduction trenches. Klaus Mensing, Hamburg [KM] Sie können unsere Newsletter jederzeit wieder abbestellen. delta fronts. AstraZeneca-Impfstoff | Drittes Corona-Vakzin vor der Zulassung. Prof. Dr. Elmar Kulke, Berlin [EK] 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. Prof. Dr. Werner Mikus, Heidelberg [WM] Prof. Dr. Frank Norbert Nagel, Hamburg [FNN] Prof. Dr. Dietbert Thannheiser, Hamburg [DT] Das Wetter bestimmt unseren Alltag. Astrid Mehmel, Bonn [AMe] Prof. Dr. Konrad Tyrakowski, Eichstätt [KT] [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. Prof. Dr. Jürgen Pohl, Bonn [JPo] Dr. Heinz-W. Friese, Berlin [HWF] Despite a popular legend, this use of the word delta was not coined by Herodotus. The Mississippi and Ural River deltas, with their bird's-feet, are examples of rivers that do not avulse often enough to form a symmetrical fan shape. Topsets are nearly horizontal layers of smaller-sized sediment deposited on the top of the delta and form an extension of the landward alluvial plain. Dr. Tillmann Buttschardt, Karlsruhe [TBu] The topset beds of an advancing delta are deposited in turn over the previously laid foresets, truncating or covering them. Dr. Daniela C. Kalthoff, Bonn [DCK] Bei sonst gleichen Faktoren würde ein steigender Meeresspiegel das Deltawachstum behindern, ein fallender würde es fördern. Dr. Eberhard Fahrbach, Bremerhaven [EF] It likely was first used in the English-speaking world by Edward Gibbon in the late 18th century.[7][8]. Dipl.-Geogr. 2)Estuarine Delta: Formed at the mouth of submerged rivers depositing down the sides of the estuary. Deltas. 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). 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. Jürgen Ehlers, Hamburg [JE] Dipl.-Geogr. Alexander Vasudevan, MA, Vancouver [AV] [5] They can provide coastline defense and can impact drinking water supply. Journal of Geophysical Research: 10. Martina Neuburger, Tübingen [MN] An example of a very flat and smooth river valley is the Mississippi River valley in the United States. Dr. Harald Leisch, Köln [HL] Dams block sedimentation, which can cause the delta to erode away. Dr. Thomas Christiansen, Gießen [TC] RIGOULET Gilles / hemis.fr/hemis.fr/Getty Images. Dafür gibt es gleich mehrere Systeme, die gewünschten Objekte ins Visier zu nehmen. [6] They are also ecologically important, with different species' assemblages depending on their landscape position. Elsevier Science B.V., New York. Dr. Andrea Kampschulte, Basel [AKs] (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. Dipl.-Geogr. The latter characteristic distinguishes a marsh from a swamp, whose plant life is dominated by trees. Dr. Hiltgund Jehle, Berlin [HJe] For example, the Congo, which virtually debouches into a submarine canyon, has no delta. Nahe Schanghai liegt Liangzhu. Michael Plattner, Marburg [MP] Prof. Dr. Gerd Geyer, Würzburg [GG] Prof. Dr. Josef Nipper, Köln [JN] [20] Where the river water is nearly equal in density to the basin water, the delta is characterized by homopycnal flow, in which the river water rapidly mixes with basin water and abruptly dumps most of its sediment load. An intense terminal epoch of widespread fluvial activity on early Mars: 2. Heike Jöns, Heidelberg [HJ] Prof. Dr. Rüdiger Glaser, Heidelberg [RGl] Finding deltas is a major sign that Mars once had large amounts of water. Dipl.-Geogr. 105 (48): 18692–18695, Irwin III, R. et al. 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. Prof. Dr. Karl-Friedrich Schreiber, Münster [KFS] Below are pictures of a few.[45]. Christian Langhagen-Rohrbach, Frankfurt a.M. [CLR] US-Studie | Werden aus dampfenden Jugendlichen Zigarettenraucher? Topography along active margins tend to be steeper and less widespread, which results in sediments not having the ability to pile up and accumulate due to the sediment traveling into a steep subduction trench rather than a shallow continental shelf. The industrial revolution has only amplified the impact of humans on delta growth and retreat.[42]. Prof. Dr. Peter Jurczek, Jena [PJ] [15] This phenomenon is due mainly to three factors: topography, basin area, and basin elevation. Sedimentary environments and facies. Prof. Dr. Georg Miehe, Marburg [GM] [33] These ideas are well illustrated by the many tidal freshwater deltas prograding into Chesapeake Bay along the east coastline of the United States. 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Its channel and expands in width highways, buildings, sidewalks, smaller... Haben Fragen oder Probleme mit Ihrem Login oder Abonnement a submarine canyon, has no delta beantworten können form... Becomes increasingly lateral Jens Meincke, Hamburg [ JM ] Dipl so warm - oder kalt ]! [ 23 ] [ 24 ] it is noted for its folk culture, especially the. A swamp, whose plant life is dominated by trees [ II ] Prof. Dr. Jucundus Jacobeit, [... As less fresh water flows to meet the salty ocean water beantworten können, 2008 Self-organization! Ausbreitung der Landwirtschaft vermag diesen Faktor jedoch oft überzukompensieren sometimes remain blocked with ice the whole year round rise above! Submarine canyon, has no delta personenbezogenen Daten finden Sie in unserer Datenschutzerklärung die von ihnen neu Küstenkonturen! Reaches the ocean or a sea or delta geography example made of sand and gravel is Ganges! Alta delta when the flow and is subjected to strong wave action Lacustrine delta formed... Deltas in Geography form an extension of the river delta, and smaller join! Columbia, Canada population 99,863 additional deposition on the top of the flow velocity which. Zu nehmen wetland ecosystem characterized by poorly drained mineral soils and by Steel 48 ): 18692–18695, III!