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- W1481696773 abstract "This investigation was to improve the design of rock lined channels. By an extensive review of the literature it became apparent that there exist important functional relationships between Manning's n and the Froude number, Reynolds number, relative roughness, and slope. To establish these relationships, over one hundred independent field and laboratory data-sets were subjected to statistical analysis. Results revealed that for rough channels n is influenced by the Froude number and the slope. In smooth channels (y is greater than 6 D sub 50) n is primarily controlled by the Reynolds number. Based on these results the selection of the proper roughness factor n for drainage channels lined with larger rocks may be aided by the relationship n = 0.38 S to the 0.57th power/F where S is the channel slope and F is the Froude number of the flow. This formula is for the initial determination of the magnitude of n. As a consequence of these results, the maximum Manning's n for large channels specified in the ODOT Location and Design Manual was recommended to be changed from n = 0.06 to n = 0.04. (FHWA)" @default.
- W1481696773 created "2016-06-24" @default.
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- W1481696773 date "1980-07-01" @default.
- W1481696773 modified "2023-09-24" @default.
- W1481696773 title "ROUGHNESS CHARACTERISTICS OF ROCK-LINED CHANNELS" @default.
- W1481696773 hasPublicationYear "1980" @default.
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