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Títol:
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Equivalent roughness of gravel-bed rivers
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Autor/a:
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López Alonso, Raúl; Barragán Fernández, Javier
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Notes:
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The relation between the equivalent roughness and different grain size percentiles of the sediment in gravel-bed rivers was determined under the hypothesis that the vertical distribution of the flow velocity follows a logarithmic law. A set of 954 data points was selected from rivers
with gravel size sediment or larger, with a non-sinuous alignment and free of vegetation or obstacles. According to the results, the ks roughness is equivalent to approximately 2.4D90, 2.8D84, and 6.1D50. No correlation was detected between the sediment sorting and the sediment mobility index on one hand, and, on the other, the coefficient of proportionality of each grain
size percentile. |
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Matèries:
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-Bed roughness
-Flow resistance
-Gravel
-Mountain streams
-Fluvial hydraulics
-Rius -- Hidràulica
-Enginyeria hidràulica |
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Drets:
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(c) American Society of Civil Engineers, 2008
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Tipus de document:
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article
acceptedVersion |
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Publicat per:
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American Society of Civil Engineers
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