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Bed topography and grain size in open channel bends
Author(s) -
BRIDGE JOHN S.
Publication year - 1976
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.1365-3091.1976.tb00058.x
Subject(s) - geology , grain size , bed load , point bar , flow (mathematics) , channel (broadcasting) , bar (unit) , friction coefficient , open channel flow , sediment , geotechnical engineering , mechanics , geometry , geomorphology , sediment transport , mathematics , materials science , physics , oceanography , engineering , structural basin , electrical engineering , fluvial , composite material
Engelund's (1974a, b) theoretical bed topography model for curved channels is modified and shown to fit natural channels when using values for the dynamic bed load friction coefficient of about 0·4–0·5. The dependence of this coefficient on grain size for flow in the lower flow regime is discussed. Using the bed topography model simultaneously, Allen's (1970a, b) theory for grain size variation over point bar profiles is shown to be broadly applicable. The interaction between sediment, flow and bed topography in bends is therefore adequately described.