nutrient-rich chemical substance (natural or manmade) applied to soil to encourage plant growth. rise and fall of the ocean's waters, caused by the gravitational pull of the moon and sun. a large natural stream of water (larger than a creek) delta. A habitat is an environment where an organism lives throughout the year or for shorter periods of time to find a mate. Delta, low-lying plain that is composed of stream-borne sediments deposited by a river at its mouth. Plants such as lilies and hibiscus grow in deltas, as well as herbs such as wort, which are used in traditional medicines. Over time, delta switching can create entirely new deltaic lobes. Its population is around 500,000 residents. The rectangle has an area of 15. The first so-called delta was the Nile Delta, named by the Greek historian Herodotus. Delta Name Meaning. Tide-dominated deltas usually form in areas with a large tidal range, or area between high tide and low tide. This causes sediment, solid material carried downstream by currents, to fall to the river bottom. landform created as a river deposits sediment into the body of water as it empties. The term delta comes from the upper-case Greek letter delta (Δ), which is shaped like a triangle. Many, many animals are indigenous to the shallow, shifting waters of a delta. The Yellow River forms an estuary, for instance, as it reaches the Bohai Sea off the coast of northern China. Join our community of educators and receive the latest information on National Geographic's resources for you and your students. rough or composed of large, jagged particles. measurement of the rate and direction of change in the position of an object. A Delta is one landform that has a rich history and a wealth of benefits. An example of an inland delta is the Peace–Athabasca Delta. This is the delta. 4. The MDNHA meaning is Mississippi Delta National Heritage Area. Inland deltas, which empty into a plain, are extremely rare. Another word for delta. In Silt is rich in nutrients that help microbes and plants—the producers in the food web—grow. For full treatment, see river: Deltas. construction or preparation of land for housing, industry, or agriculture. landform noted for its opposite-seeming appearance: the wide end of the delta is inland, while the narrow end empties into a body of water. The subaqueous part of a delta is underwater. severe weather indicating a disturbed state of the atmosphere resulting from uplifted air. Pop: 4 098 391 (2006). type of animal (an arthropod) with a hard shell and segmented body that usually lives in the water. place on a body of water where ships can tie up or dock and load and unload cargo. They're great to … The Amazon, the largest river in the world, is without a delta. Although very uncommon, deltas can also empty into land. Keep in mind that many names may have different meanings in other countries and languages, so be careful that the name that you choose doesn’t mean something bad or unpleasant. Definition: The Delta of an option is a calculated value that estimates the rate of change in the price of the option given a 1 point move in the underlying asset. Delta switching has resulted in seven or eight distinct deltaic lobes of the Mississippi River over, at least, the past 5,000 years. A relative delta compares the difference between two numbers, A and B, as a percentage of one of the numbers. synonyms. The Mississippi Delta is actually a flood plain between two rivers in northwestern Mississippi, the Mississippi and the Yazoo, it is sometimes to as the Yazoo-Mississippi Delta. Listen to Robert Johnson here. Deltas are incredibly important to the human geography of a region. Delta, low-lying plain that is composed of stream-borne sediments deposited by a river at its mouth. landform created as a river develops a new channel, leaving the other to dry up or stagnate. The Niger delta is a vast low-lying region through which the waters of the Niger River drain into the Gulf of Guinea. the art and science of controlling the flow, path, and power of rivers. Engineers and government officials must consistently debate the interests of agriculture, industry, the environment, and citizen safety and health when putting delta wetlands at risk. to observe and record behavior or data. process of a delta distributary abandoning one channel and carving out another. Deltas also filter water as it slowly makes its way through the delta's distributary network. Deltas with this triangular or fan shape are called arcuate (arc-like) deltas. 2 EEG low-frequency components, especially delta bands, are the primary contributor to the P300 peak of event-related potentials (ERPs). (The Fly, on the other hand, does form a rich delta as it empties into the Gulf of Papua, part of the Pacific Ocean.). The Tiber River forms a cuspate delta as it empties into the Tyrrhenian Sea near Rome, Italy. The basic formula is A - B/A x100. Pickens recognized that the brutal treatment that African American laborers suffered at the hands of whites in the Arkansas and Mississippi, دلتا، ديو نانى الفباء څلورم تورى، هغه خړه چه دسيل په اثر درود په شاوخوا كې تشكيله شوې وى، دنيل درود دلتا, دریا کے دہانے پر اسکی مختلف شاخوں کے درمیان تکونا قطعئہ زمین جو دریا کی لائی ہوئی مٹی سے بنتا ہے, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Developing: Delta senatorial districts hold primaries, Delta is first US airline to offer video chat with Reservations team, Deltas sink worldwide, increasing flood risk, Delta Air Lines to Open New City Ticket Office in Kuwait City and Offers Special Fare on New Nonstop Service between Kuwait City and Atlanta, USA, Delta Education assets sold to School Specialty, Inc, One-two punch vaccine fights herpes with antibodies, T cells, American Congo: The African American Freedom Struggle in the Delta, Delridge Neighborhoods Development Association, delta (delta)-aminobutyric acid aminotransferase, Delta Area Economic Opportunity Corporation. The finest material is deposited beyond the river's mouth. Although very uncommon, deltas can also empty into land. In some cases, this means a difference between two values, such as two points on a line. mouth of a river where the river's current meets the sea's tide. Types of River Deltas . The region most influenced by the river's flow is called the upper delta. Within the delta the river breaks up into an… Read More; Nigeria able to produce crops or sustain agriculture. system or order of a nation, state, or other political unit. The triangle-shaped Nile Delta is a perfect example of an arcuate delta. The letter D may be used as a suffix to denote a time being in the Delta Time Zone, such as 08:00D or 0800D. Any interactives on this page can only be played while you are visiting our website. Deltoid definition, a large, triangular muscle covering the joint of the shoulder, the action of which raises the arm away from the side of the body. The delta consists of three parts: the upper delta plain, lower delta plain and subaqueous. This is spoken as "zero eight hundred Delta". Hong Kong and Macau are welcoming to western business, and provide an entryway to the Chinese market. person who studies the physical formations of the Earth. Capital: Asaba. The delta spreads water and silt across a flat plain in the Kalahari Desert before being evaporated. One of the first texts to describe deltas was History, written during the 5th century bce by Greek historian Herodotus. This process is called avulsion. gravel, sand, and smaller materials deposited by flowing water. The slowing velocity of the river and the build-up of sediment allows the river to break from its single channel as it nears its mouth. National Geographic Video: Okavango Delta, State of Louisiana: Mississippi River Delta Basin. Teach your students about the Earth’s rivers and streams with the resources in this collection. It is also home to many diverse fish, plant, and crustacean species. The total area of the Delta, including both land and water, is about 1,100 square miles (2,800 km 2). Deltas are wetlands that form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river. The Pearl River delta region is growing so quickly, it frequently experiences labor shortages as immigrants from the Chinese interior settle in the area, seeking a better life and higher wages. activity that produces goods and services. In contrast, the delta is formed when the rivers witness low tides. The region has been called "The Most Southern Place on Earth" ("Southern" in the sense of "characteristic of its region, the American South"), because of its unique racial, cultural, and economic history. Tide-dominated deltas usually form in areas with a large tidal range, or area between high tide and low tide. 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. Usually rivers enter another body of water at their mouths. The sediment carried along and deposited by huge flowing rivers creates an area rich in nutrients and ideal for Today, Egypt is much more reliant on fertilizers and irrigation. By definition, the mouth of the river is where the river drains into a water body such as lake, ocean or sea, leading to reduction of the rivers capability to transport sediment any farther. Conversely, Delta is a triangular land at the river mouth travelled across by its distributaries. DAHEC as abbreviation means "Delta Area Health Education Center". In a wave-dominated delta, the movement of waves controls a delta's size and shape. Also called an alpha predator or top predator. a slope of land adjoining a body of water, or a large elevated area of the sea floor. Example: When each square is 1 meter on a side, then the area is 15 m 2 (15 square meters) Square Meter vs Meter Square. They are usually steeper than the normal flat plain of a wave-dominated or tide-dominated delta. One of the first texts to describe deltas was History, written during the 5th century bce by Greek historian Herodotus. Search through these resources to discover more about unique landforms and landscapes around the world. Q: A: What does DAHEC mean? The Pearl River Delta, sometimes called the Delta of Guangdong, is another heavily urbanized river delta. These resources can be used to teach middle schoolers more about the natural world, its distinctive features, and landscapes. All rights reserved. Privacy Notice |  all related food chains in an ecosystem. 1. a low triangular area of alluvial deposits where a river divides before entering a larger body of water 2. an object shaped like an equilateral triangle 3. the 4th letter of the Greek alphabet Familiarity information: DELTA used as a noun is uncommon. Use these resources to teach middle school students about biomes around the world. The Rights Holder for media is the person or group credited. Explore different types of habitats and microhabitats with this curated collection of classroom resources. For full treatment, see river: Deltas. 4. The upper delta plain makes up the area nearest to land. (Physical Geography) (capital when part of name) the flat alluvial area at the mouth of some rivers where the mainstream splits up into several distributaries: the Mississippi Delta. She or he will best know the preferred format. Deltas form when a river flows into a body of standing water, such as a sea or lake. water level that has risen as a result of the moon's gravitational pull on the Earth. newest, most aquatic-facing portion of a delta, featuring the finest sediment. Flat, alluvial land at a river mouth where it splits into many streams called distributaries. Problems 1. 2005 storm that was one of the deadliest in U.S. history. The Mississippi Delta is actually a flood plain between two rivers in northwestern Mississippi, the Mississippi and the Yazoo, it is sometimes to as the Yazoo-Mississippi Delta. (noun) Dictionary ! a low triangular area of alluvial deposits where a river divides before entering a larger body of water. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. the difference in height between an area's high tide and low tide. There are two major ways of classifying deltas. Delta Time Zone is also commonly used at sea between longitudes 52.5° East and 67.5° East. Q: A: What is shorthand of Delta Area Health Education Center? 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. area of land that receives no more than 25 centimeters (10 inches) of precipitation a year. They are important places for trade and commerce, for instance. The habitat contains all an animal needs to survive such as food and shelter. This water is the lifeline of ecosystems around the world. As Delta moves away this weekend, we will warm up with temps in the 80s and 90s for Saturday and Sunday. Biology, Ecology, Geography, Physical Geography. A relative delta compares the difference between two numbers, A and B, as a percentage of one of the numbers. Its unique conditions may be home to unique species that may not be found in the larger region. A river will also not form a delta if exposed to powerful waves. The basic formula is A - B/A x100. delta definition in English dictionary, delta meaning, synonyms, see also 'delta connection',delta iron',delta particle',delta ray'. The Mississippi River forms a bird-foot delta as it empties into the Gulf of Mexico. How to use delta in a sentence. specific natural feature on the Earth's surface. Area: 17 698 sq km (6833 sq miles), [1350–1400; Middle English < Latin < Greek. Deltas absorb runoff from both floods (from rivers) and storms (from lakes or the ocean). species at the top of the food chain, with no predators of its own. Finally, decades of river management prevent the Mississippi River from naturally flowing through its delta wetlands. A usually triangular alluvial deposit at the mouth of a river. Bangladesh sits almost entirely on this delta. in the direction of a flow, toward its end. The process of avulsion in deltaic lobes is called delta lobe switching. A delta is sometimes divided into two parts: subaqueous and subaerial. The Nile delta is also shrinking as a result of the Aswan Dam and other river management techniques. The booming city of Vancouver, British Columbia, Canada, sits on the delta of the Fraser River as it empties into the Strait of Georgia, part of the Pacific Ocean. delta definition: 1. an area of low, flat land, sometimes shaped like a triangle, where a river divides into several…. 2. an object resembling a capital delta in shape 3. 1145 17th Street NW Slide guitar is one of the standard instruments used by delta blues musicians, while familiar topics include poverty and injustice. Terms of Service |  Of that, only about 1.2 percent can be used as drinking water; the rest is locked up in glaciers, ice caps, and permafrost, or buried deep in the ground. Rivers that encounter high tides are more likely to form estuary. In the Greek numeral system, it has the value of four. The upper delta plain is the area closest to land with the least amount of water. Tides also limit where deltas can form. The tides of the Atlantic Ocean are too strong to allow silt to create a delta on the Amazon. Northern California's Sacramento-San Joaquin River Delta. Hop on to get the meaning of MDNHA acronym / slang / Abbreviation. A river moves more slowly as it nears its mouth, or end. An estuary is a partly enclosed wetland that features a brackish water (part-saltwater, part-freshwater) habitat. It is 200 miles (320 km) long and 87 miles (140 km) across at its widest … Delta expresses the amount of price change a derivative will see based on the price of the underlying security (e.g., stock). Effectively a delta E* tolerance value defines an acceptance sphere around the standard or target color. to oversee, manage, or be in charge of. See more. If a media asset is downloadable, a download button appears in the corner of the media viewer. This material is called alluvium or silt. largest river or channel in a watershed or drainage basin. Delta's most common meaning is that of difference or change in something.