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This picture of the Nowitna River in Alaska shows two oxbow lakes – a short one at the bottom of the picture and a longer, more curved one at the middle-right. The picture also shows that a third oxbow lake is probably in the making: the isthmus or bank in the centre of the most prominent meander is very narrow – much narrower than the width of the river; eventually, the two sections of ...
Meander scars, oxbow lakes and abandoned meanders in the broad flood plain of the Rio Negro, Argentina. 2010 astronaut photo from ISS. A meander scar, occasionally meander scarp, [1] is a geological feature formed by the remnants of a meandering water channel. They are characterized by "a crescentic cut in a bluff or valley wall, produced by ...
Oxbow lakes form lacustrine deposits from seasonal overbank flooding as well as precipitation runoff which refills these isolated basins with fresh water and new sediments. Glacial lakes form when terminal moraines block water from escaping the newly carved valley from glacial erosion. As the glacier melts, the valley fills with melt water that ...
Lacustrine terraces – A step-like landform; Lake – Large inland body of relatively still water; Oasis – Fertile area in a desert environment; Oxbow lake – U-shaped lake or pool left by an ancient river meander; Parallel Roads of Glen Roy – Nature reserve in the Highlands of Scotland with ancient shoreline terraces
The oxbow lake, which is the most common type of fluvial lake, is a crescent-shaped lake that derives its name from its distinctive curved shape. [37] Oxbow lakes are also known as cutoff lakes. [1] Such lakes form regularly in undisturbed floodplains as a result of the normal process of fluvial meandering.
It is usually an oxbow lake caused by a change in course of a river or creek, but other types of small lakes, ponds or waterholes are also called billabongs. The term is likely borrowed from Wiradjuri, an Aboriginal Australian language of New South Wales.
Most features of riverscapes include natural landforms (such as meanders and oxbow lakes) but they can also include artificial landforms (such as man-made levees and river groynes). Riverscapes can be divided into upper course riverscapes, middle course riverscapes, and lower course riverscapes.
Oxbow lake – U-shaped lake or pool left by an ancient river meander; River pocket; Secondary flow in a bowl or cup – Relatively minor flow superimposed on the primary flow by inviscid assumptions; Secondary flow in river bends – Relatively minor flow superimposed on the primary flow by inviscid assumptions