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(Article of periodic en Anglais - 1990)

Document title

The influence of microform bed roughness elements on flow and sediment transport in gravel bed rivers

Authors(s) and Affiliation(s)

HASSAN M. A. ; REID I. ;

Abstract

A series of laboratory flume experiments shows that flow resistance rises to, and falls from, a peak value as the longitudinal spacing of pebble clusters decreases, in a manner similar to that shown by others for strip roughness, isolated blocks, and simulated ripples and dunes. The experiments also reveal a strong inverse relationship between bedload flux rates and the flow resistance induced by the concentration of pebble clusters. It is concluded that pebblo cluster spacing tends towards an equilibrium that is regulated by a feedback process involving sediment transport rates and that the spatial concentration of these microforms will adjust to the point where they induce maximum flow resistance

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 1990, vol. 15, no8 [pp. 739-750]

Bibliographic references : 40 réf.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

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