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Scroll Plain
A scroll plain occurs where a river meanders across an area with a very low gradient, usually with a fairly continuous discharge. In addition to meanders, scroll plains are also characterised by many oxbow lakes. See also *Strath A strath is a large valley, typically a river valley that is wide and shallow (as opposed to a glen, which is typically narrower and deep). Word and etymology An anglicisation of the Gaelic word , it is one of many that have been absorbed i ... References Geography articles needing expert attention Plains Topography {{Topography-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meander
A meander is one of a series of regular sinuous curves in the Channel (geography), channel of a river or other watercourse. It is produced as a watercourse erosion, erodes the sediments of an outer, concave bank (cut bank, cut bank or river cliff) and deposits sediments on an inner, convex bank which is typically a point bar. The result of this coupled erosion and sedimentation is the formation of a sinuous course as the channel migrates back and forth across the axis of a floodplain. The zone within which a meandering stream periodically shifts its channel is known as a meander belt. It typically ranges from 15 to 18 times the width of the channel. Over time, meanders migrate downstream, sometimes in such a short time as to create civil engineering challenges for local municipalities attempting to maintain stable roads and bridges.Neuendorf, K.K.E., J.P. Mehl Jr., and J.A. Jackson, J.A., eds. (2005) ''Glossary of Geology'' (5th ed.). Alexandria, Virginia, American Geological I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxbow Lake
An oxbow lake is a U-shaped lake or stream pool, pool that forms when a wide meander of a river is meander cutoff, cut off, creating a free-standing body of water. The word "oxbow" can also refer to a U-shaped bend in a river or stream, whether or not it is cut off from the main stream. It takes its name from an oxbow which is part of a harness for oxen to pull a plough or cart. In South Texas, oxbows left by the Rio Grande are called ''resaca (channel), resacas''. In Australia, oxbow lakes are called billabongs. Geology An oxbow lake forms when a meandering river erodes through the neck of one of its meanders. This takes place because meanders tend to grow and become more curved over time. The river then follows a shorter course that bypasses the meander. The entrances to the abandoned meander eventually silt up, forming an oxbow lake. Oxbow lakes are stillwater lakes, with no current flowing through them, which causes the lake bed to gradually accumulate silt, becoming a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strath
A strath is a large valley, typically a river valley that is wide and shallow (as opposed to a glen, which is typically narrower and deep). Word and etymology An anglicisation of the Gaelic word , it is one of many that have been absorbed into the English and Scots languages. It is commonly used in rural Scotland to describe a wide valley, even by non-Gaelic speakers. In Scottish place-names, ''Strath-'' is of Gaelic and Brittonic origin. ''Strath-'' names have a similar origin to Gaelic , meaning "broad-valley", as well as to Cumbric and Pictish cognates (''cf.'' Welsh ). Gaelic is derived from Old Irish , recorded as having meant "grassland". The modern Scottish Gaelic sense of "broad-valley", paralleling the meaning of Brittonic cognates, developed from substrate influence from Pictish. Toponymy It occurs in numerous place names within Scotland including Strathmore, Strathspey and Strathclyde. Abroad, many places with Scottish heritage also use the prefix, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geography Articles Needing Expert Attention
Geography (from Ancient Greek ; combining 'Earth' and 'write', literally 'Earth writing') is the study of the lands, features, inhabitants, and phenomena of Earth. Geography is an all-encompassing discipline that seeks an understanding of Earth and its human and natural complexities—not merely where objects are, but also how they have changed and come to be. While geography is specific to Earth, many concepts can be applied more broadly to other celestial bodies in the field of planetary science. Geography has been called "a bridge between natural science and social science disciplines." Origins of many of the concepts in geography can be traced to Greek Eratosthenes of Cyrene, who may have coined the term "geographia" (). The first recorded use of the word γεωγραφία was as the title of a book by Greek scholar Claudius Ptolemy (100 – 170 AD). This work created the so-called "Ptolemaic tradition" of geography, which included "Ptolemaic cartographic theory." ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plains
In geography, a plain, commonly known as flatland, is a flat expanse of land that generally does not change much in elevation, and is primarily treeless. Plains occur as lowlands along valleys or at the base of mountains, as coastal plains, and as plateaus or uplands. Plains are one of the major landforms on earth, being present on all continents and covering more than one-third of the world's land area. Plains in many areas are important for agriculture. There are various types of plains and biomes on them. Description A plain or flatland is a flat expanse of land with a layer of grass that generally does not change much in elevation, and is primarily treeless. Plains occur as lowlands along valleys or at the base of mountains, as coastal plains, and as plateaus or uplands. Plains are one of the major landforms on earth, where they are present on all continents, and cover more than one-third of the world's land area. In a valley, a plain is enclosed on two sides, but i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
