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Anastomosing channels are multithreaded, but are much more stable than braided channels and commonly have thick clay and silt banks and occur at lower gradients of stream bed. Wandering rivers fall between sinuous single thread and braided streams and are relatively stable multi-channel gravel bed rivers.
Ductile shear zones frequently show anastomosing geometries of highly-strained rocks around lozenges of less-deformed material. [14] Molten lava flows sometimes flow in anastomosed lava channels [15] or lava tubes. [16] In cave systems, anastomosis is the splitting of cave passages that later reconnect. [17]
Often confused with braided channels, anastomosing is reserved for a type of river with multiple, interconnected, coexisting channel belts on alluvial plains. Based on its geomorphology, saucer-shaped islands called flood-basins characterize anastomosing rivers. [ 5 ]
Natural alluvial channels have a variety of morphological patterns, but can be generally described as straight, meandering, braided, or anastomosing. [3] Different channel patterns result from differences in bankfull discharge, gradient, sediment supply, and bank material. [3]
A braided river differs from a meandering river, which has a single sinuous channel. It is also distinct from an anastomosing river, which consist of multiple interweaving semi-permanent channels which are separated by floodplain rather than channel bars; these channels may themselves be braided. [3]
These channels are separated by mid-channel or braid bars. Anastomosing river channels also create mid-channel bars, however they are typically vegetated bars, making them more permanent than the bars found in a braided river channel which have high rates of change because of the large amounts of non-cohesive sediment, lack of vegetation, and ...
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This ecosystem of entangled logs, vegetation and sediments remained in place for almost two millennia, altering the flow regime of the Red River and causing a complete change in its geomorphic character from a single channel to a series of anastomosing channels.