نتایج جستجو برای: bedform
تعداد نتایج: 222 فیلتر نتایج به سال:
Non-intrusive technologies for the in-situ measurement of river morphological features are increasingly popular in scientific and practice communities due to their efficient productive data acquisition. While suspended load with optical acoustic is currently an active area research, bedform dynamics has not experienced similar progress. We have successfully demonstrated through laboratory exper...
Raked linear dunes keep a constant orientation for considerable distances with a marked asymmetry between a periodic pattern of semi-crescentic structures on one side and a continuous slope on the other. Here we show that this shape is associated with a steady-state dune type arising from the coexistence of two dune growth mechanisms. Primary ridges elongate in the direction of the resultant sa...
Although drumlins and other subglacial bedforms are well-studied features, controls on their formation and morphometry have remained elusive. Of current interest is the hypothesis that elongate bedforms (length:width ratios]/10) indicate fast ice flow, and perhaps the location of past ice streams. This hypothesis is explored by analysing drumlins from the New York State drumlin field. A subset ...
Seabed-structure interactions are responsible for the burial of heavy objects, such as mines, pipelines, concrete breakwaters, platforms, debris, and other objects on the seafloor. In low shear strength muds, these objects are known to bury at impact or to sink into the sediment if the buoyant weight of the object exceeds the bearing capacity of the seafloor. In higher energy sandy sediments, b...
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