Mediterranean Climate: It is the climatic characteristics observed around the Mediterranean region. Meanders Formation of a meander. They are typical of the middle and lower course of a river. Meanders are usually exhibited at the middle course of rivers. Mäander im Wörterbuch: Bedeutung, Definition, Synonyme, Übersetzung, Herkunft, Rechtschreibung, Beispiele, Silbentrennung, Aussprache. Learn more. To follow a winding and turning course: Streams tend to meander through level land. Meanders separate themselves from the river later, and then become non-existent. Meanders are typical landforms at the middle and lower courses of a river. The following are processes which lead to the formation of meanders in river bodies. meander in the Geography topic by Longman Dictionary of Contemporary English | LDOCE | What you need to know about Geography: words, phrases and expressions | Geography His gaze meandered over the church's façade. At this point, an ‘oxbow lake’ is said to be formed. This is due to the fact that the water on the outside bend of river water flow is deeper and runs faster than the water flowing at the inside portion of the bend. The water stream erodes the external margin of the stream bed due to the higher speed in which it flows, transports the sediment and afterwards deposit it in the internal margin (where the speed of the flow is slower). If a river, stream, or road meanders, it follows a route that is not straight or direct. As a result of the erosion on the outside portion the bend of flowing river water, erosion occurs, coupled with deposition on the inside portion of the sinusoidal curve. How do Rainbows Form? A resultant increase in flow energy is also exhibited. The term ‘meander’ is one which refers to a winding curve or bend in a river. A meander cutoff, the natural form of a cutting or cut in a river occurs when a pronounced meander (hook) in a river is breached by a flow that connects the two closest parts of the hook to form a new channel, a full loop. Ideal waveforms, such as a sine wave, are one line thick, but in the case of a stream the width must be taken into consideration. (And Which Foods to Avoid), Can Squirrels Eat Raisins? Meanders form when water in the river erodes the banks on the outside of the channel. This theory states that: The meander train is assumed to be a result of the stochastic fluctuation of the direction of flow due to the random presence of direction-changing obstacles in the path of a river. Process of Infiltration in Water Cycle and Why It Is Important, 7 Continents of the World And Their Countries and Area Size, Cape Landform: Formation, Examples and Difference Between a Cape and a Peninsula, 30 Extraordinary Recycling Facts For Kids That You Absolutely Need to Know, geography.learnontheinternet.co.uk/topics/river_middle_course.html, https://www.bbc.com/bitesize/guides/ztpkqty/revision/2&hl=en-NG, coolgeography.co.uk/GCSE/AQA/Water%20on%20the%20Land/Meanders/Landforms%20Meanders.htm, Can Squirrels Eat Bread? Due to lateral erosion, the river widens and the river water flows over flatter land to develop larger bends which are referred to as ‘meanders.’ The characteristic sinusoidal (sinewave-like or snake-like) flow of water is therefore exhibited after the complete formation of meanders at the middle course of river bodies. Meanders are formed mainly in plains by erosion, transport and deposition of small and medium sized particles, such as sand, lime and clay. (And Do They Mate With Other Species). Therefore, as water flows from the upper course of a river at very high energy, the impact it has on the landform on which the river is situated elicits erosional, transportation and deposition processes. BSL Geography Glossary - Meander - definition. meander definition: 1. A perfect example could be found in the River Derwent, North Yorkshire which is almost at the point of breaching. Fact 3: The term ‘incised meander’ refers to meanders of a stream or river which has cut its bed down into the bedrock. All Rights Reserved . The speed of water flow increases and the hydraulic action together with abrasion forces impacted results in increased erosion. The deposition process cuts off the original meander, leaving a horseshoe-like feature known as an oxbow lake. Thus, the river does not get any wider. Just after the cutoff meander is formed, the river flows into its end from the river and builds a small delta which eventually results in the formation of oxbow lakes. Meanders only occur on flat land where the river is large and established. The major contributors to the creation of meanders include erosion, transportation, and deposition processes. The point bar or meander bar is a gently sloping deposit of sand, gravel, and pebbles. Ultimately, the river flow starts to swing from side to side. These lakes are usually formed by the normal process of fluvial meandering. 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. It is produced by a stream or river swinging from side to side as it flows across its floodplain or shifts its channel within a valley. Usually, the energy accompanying flow water in a river decreases progressively from the upper course of the river to the lowest course of the river. (And Are They Still Growing), LEED Certification: Why Do You Need it and Process to Apply For it, How Can Animals Drink Dirty Water? The oxbow lakes are also known as ‘cut-off lakes’. Meanders only occur on flat land where the river is large and established. бродить без цели; растекаться мыслью по древу, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Mean-Subtracted Lowest Frequency Sub-Band, Mean-Time-Between-Critical-Failures, Hardware, Meander Open Complementary Split-Ring Resonator. 2. to…. Her passion for science education drove her to start EarthEclipse with the sole objective of finding and sharing fun and interesting science facts. It is characterized as an irregular waveform. A curve in a river that swings in wide loops from side to side. More water is gained by the deepening bend as the river makes its way to the middle course of the river. (And Process of Formation), How Were the Himalayas Formed? This stage of meander formation eventually causes the neck of the meander to be breached by the river creating an ox-bow lake. Fact 6: The sharp bend in a river’s course, called a ‘meander’, is eventually cut off by a new channel that forms across the neck of land created by the meander. https://www.thefreedictionary.com/Meander+(geography). The formation of a meander. Meanders are typical landforms at the middle and lower courses of a river. (And Which Foods Do They Actually Like), How Do Birds Mate? She loves writing on topics related to space, environment, chemistry, biology, geology and geography. Thus, during low flow conditions, straight river channels develop bars of sediment on their beds which leads to an eventual formation of deeper pathways which ultimately allow more flow of water and consequent formation of a sinusoidal flow of water. Mäander ist die Bezeichnung einer Flussschlinge in einer Abfolge weiterer Flussschlingen, wie sie sich in unbefestigten Fließgewässerabschnitten mit sehr geringem Sohlgefälle und gleichzeitig transportiertem, feinkörnigem Geschiebe auf natürliche Weise bildet. Then, a point bar forms on the inner bank. This is one of the most common geographical … These streams flow through soft and deep stream beds, carrying mud (lime and clay), sand and, sometimes, gravel.