A river delta is a landform that is formed at the mouth of a river, where the river flows into an ocean, sea, estuary, lake, or reservoir. There are several criteria for a river to form a delta. An area of the south-central United States extending on either side of the Mississippi River from Memphis, Tennessee, to Vicksburg, Mississippi. Meaning of River delta. This usually occurs when the river joins a sea, estuary, ocean, lake, reservoir or in rare cases a slower moving river. The nearness to the sea and the easy means of navigation of goods and people also makes some deltas of the world important industrial hubs. How Much Of The Amazon Rainforest Is Left. What does River delta mean? The numerical value of River delta in Chaldean Numerology is: 6, The numerical value of River delta in Pythagorean Numerology is: 6. Some example of major deltas of the world is the Nile River delta and the Ganges River delta. Over long periods of time, this deposition builds the characteristic geographic pattern of a river delta. An example of an inland delta is the Peace–Athabasca Delta. As the sediments build up over time, the river no longer flows through a single channel since the heavy deposits of sediments impede the flow of water. It is formed by sediment carried by the river being deposited in the wider mouth. Third, the river must drain into a body of water that is either static or has a slow flow rate to prevent the fast removal of sediments carried by the river at its mouth. Information and translations of River delta in the most comprehensive dictionary definitions resource on the web. Sand and gravel are also quarried from deltas and are utilized for a variety of purposes like road and building construction. This page was last changed on 4 June 2020, at 23:30. It is formed by sediment carried by the river being deposited in the wider mouth. Usually in cases of rivers entering the sea or a salt lake, the waters of the river float on top of the denser sea water. 7 8 9. Such deltas often occur on former lake beds. Meaning of River delta. A Gilbert delta is formed when the sediments deposited to form the delta are coarse in nature. A river delta is a landform where the mouth of a river flows into an ocean, sea, desert, estuary, lake or another river. For example, the Ganga-Brahmaputra delta region in Bangladesh and West Bengal, India supports an extremely high density of population. Despite a popular legend to the contrary, this usage of the word delta was not coined by Herodotus. By Oishimaya Sen Nag on April 25 2017 in Environment. This flow expansion results in a decrease in the flow velocity, which diminishes the ability of the flow to transport … Such deltas usually form at places where a mountain river joins a freshwater lake. A river delta is formed at the mouth of a river where the river deposits the sediment load carried by it and drains into a slower moving or static body of water. Definition of River delta in the Definitions.net dictionary. In tide-dominated deltas, tides control the shape of the delta. 24 Oct. 2020. All the distributaries of a river continue to flow downwards towards the body of water into which the river empties its waters. Thus, a fan-shaped river delta eventually develops with various distributaries and sedimental land forms. Several creeks that flow into the Okanagan Lake in British Columbia form such a delta at their mouths. Dams alter the natural flow of rivers and the sedimentation rate in the delta. 2017-05-25 20:21:03 2017-05-25 20:21:03. 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 STANDS4 LLC, 2020. This usually occurs when the river joins a sea, estuary, ocean, lake, reservoir or in rare cases a slower moving river. delta synonyms, delta pronunciation, delta translation, English dictionary definition of delta. In rare cases, a river might branch out at a specific location inland, deposit its sediments at the location, and then again rejoin to continue as a river. The river must carry enough sediment to layer into deltas over time. While some suggest that Gilbert deltas are formed at both marine and lacustrine locations, others suggest that they are formed when the river waters blend more easily with the waters of a freshwater lake. The largest delta draining into a freshwater body is the St. Clair River delta which drains into the Lake St. Clair. River deltas form when a river carrying sediment reaches either (1) a body of standing water, such as a lake, ocean, or reservoir, (2) another river that cannot remove the sediment quickly enough to stop delta formation, or (3) an inland region where the water spreads out and deposits sediments. In wave-dominated deltas, the shape of the delta is controlled by wave-driven sediments. A river delta is formed at the mouth of a river where the river deposits the sediment load carried by it and drains into a slower moving or static body of water. https://www.definitions.net/definition/River+delta. These distributaries gradually silt up and finally become non-existent. Lower volumes of sediments now reach the delta leading to the gradual erosion of the delta region. The presence of deltas in the planet thus signify that once large amounts of water existed there. Such an area is called an inland delta. delta definition: 1. an area of low, flat land, sometimes shaped like a triangle, where a river divides into several…. Information and translations of River delta in the most comprehensive dictionary definitions resource on the web. The river's velocity decreases rapidly, causin… Learn more. River deltas form when a river carrying sediment reaches either (1) a body of water, such as a lake, ocean, or reservoir, (2) another river that cannot remove the sediment quickly enough to stop delta formation, or (3) an inland region where the water spreads out and deposits sediments. Thanks for your vote! When a river enters its last phase before it drains into another body of water, it is usually no longer confined to the channel in which it flows but its waters spread out as it enters another body of water. At present, visitors to Hong Kong from mainland China tend to fly in for one or two days, mostly for shopping, and seldom travel to other areas in the Pearl River Delta. Also, the salinity levels of the deltaic waters increase as less fresh water enters the ocean due to extraction upstream of the dam. We truly appreciate your support. All maps, graphics, flags, photos and original descriptions © 2020 worldatlas.com, The Most Polluted River In The World: The Citarum River, Countries Doing The Most To Combat Climate Change.

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