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Bed shear stress over subaqueous dunes, and the transition to upper‐stage plane beds
Author(s) -
BRIDGE JOHN S.
Publication year - 1981
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1981.tb01660.x
Subject(s) - geology , bedform , stage (stratigraphy) , geomorphology , shear stress , geotechnical engineering , shear (geology) , plane (geometry) , geometry , petrology , paleontology , sediment , sediment transport , mechanics , physics , mathematics
Plane beds that replace small bedforms (e.g. ripples) on the backs of subaqueous dunes are dynamically similar to upper‐stage plane beds. Local bed shear stresses at the position on dunes where plane beds develop may be two to three times larger than on a completely plane bed under the same general hydraulic conditions. These observations help explain the transition from dunes to a wholly upper‐stage plane bed.