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Kinematic wave model of bed profiles in alluvial channels
Author(s) -
Tayfur Gokmen,
Singh Vijay P.
Publication year - 2006
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/2005wr004089
Subject(s) - flume , alluvium , sediment transport , kinematic wave , geology , geotechnical engineering , mechanics , bedform , flow (mathematics) , sediment , wave flume , hydrology (agriculture) , geomorphology , wave propagation , breaking wave , physics , ecology , quantum mechanics , surface runoff , biology
A mathematical model, based on the kinematic wave (KW) theory, is developed for describing the evolution and movement of bed profiles in alluvial channels. The model employs a functional relation between sediment transport rate and concentration, a relation between flow velocity and depth and Velikanov's formula relating suspended sediment concentration to flow variables. Laboratory flume and field data are used to test the model. Transient bed profiles in alluvial channels are also simulated for several hypothetical cases involving different water flow and sediment concentration characteristics. The model‐simulated bed profiles are found to be in good agreement with what is observed in the laboratory, and they seem theoretically reasonable for hypothetical cases. The model results reveal that the mean particle velocity and maximum concentration (maximum bed form elevation) strongly affect transient bed profiles.