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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Characterization of the bed roughness of the cavaillon river, haiti: an application of the pebble co...
Characterization of the bed roughness of the cavaillon river, haiti: an application of the pebble count method
Author : OLIVER CARLIER DĄŻODEIGNE(1), ADERMUS JOSEPH(2), YVES ZECH(3), NYANKONA GONOMY(4) & SANDRA SOARES-FRAZÃO(5)
ABSTRACT
The definition of the bed roughness of a natural river remains a key element in the characterization of a fluvial system in
order to achieve a 1-D or 2-D modeling of the flow. The Cavaillon River is a Southern Haiti River causing considerable
management problems since its behavior is uncertain and likely to cause serious damage to local populations living along
its banks. This paper presents an in-situ study of the roughness of the river by an application of the Pebble Count method
(Wolman, 1954). The advantage of using this method in a context such as Haiti, is the relative ease of implementation,
requiring very little equipment. Indeed, the procedure consists in randomly picking up 100 pebbles along a river cross
section and measuring the length of their intermediate axis. These samples are then recorded according to this measured
length in different size classes to draw a frequency distribution curve of bed materials, from which the desired parameters
can be read. Through a regular monitoring of the bed roughness of several sections along the river, it will be possible to
observe the evolution of the parameters, for example following a flood event. Also, an analysis of sediment distributions of
several consecutive sections might provide useful information about the behavior of tributaries during flood events, and
especially the solid discharge transported by these.
File Size : 256,323 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 27/08/2015
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