SIZING AN OPEN CHANNEL WITH HORIZONTAL BOTTOM AND CIRCULAR WALLS USING THE ROUGH MODEL METHOD
Journal Title: Larhyss Journal - Year 2017, Vol 31, Issue 31
Abstract
The dimensioning of the channels and especially the computation of normal depth plays a significant role in the practice of hydraulic engineer. The classical methods usually used are graphical or iterative to determine the linear dimensions of a pipe or a channel. They also consider, unreasonably, Chezy’s coefficient or Manning’s roughness coefficient as a given data of the problem, despite the fact that these coefficients depend on the linear dimensions sought. This problem can be easily solved by the application of a new method called the rough model method or simply the RMM. In this study, this new analytical method is presented and applied for the calculation of the linear dimensions of an open channel with horizontal bottom and circular sides. These linear dimensions are: the normal depth of flow, the width of the base of the channel and the diameter of circular parts of the channel. The method takes into account, in particular, the effect of the absolute roughness which is a readily measurable parameter in practice. In a first step, the method is applied to a referential rough model in order to establish the relationships that govern its hydraulic characteristics. In a second step, these equations are used to easily deduce the required linear dimensions by introducing a non-dimensional correction factor. A practical example is considered to better explain the advocated method and to appreciate its simplicity and efficiency.
Authors and Affiliations
LAKEHAL M. | Unversité Badji Mokhtar, Annaba. Laboratoire de Recherche en Génie Civil, Hydraulique, Développement Durable et Environnement, LARGHYDE, ACHOUR B. | Université Mohamed Khider, Biskra. Laboratoire de Recherche en Hydraulique Souterraine et de Surface, LARHYSS
Keywords
Related Articles
- EP ID EP15318
- DOI -
- Views 391
- Downloads 17
THE SHARING OF WATER IN THE OASES OF TIMIMOUN HERITAGE CULTURAL DECLINING
The oases of Timimoun are irrigated by ancestral techniques called Foggara. The Foggara system is based on a gallery of slightly sloping conveying the groundwater to the surface. The Foggara is a collective proprety be...
DISINFECTION OF DRINKING WATER-CONSTRAINTS AND OPTIMIZATION PERSPECTIVES IN ALGERIA
Drinking water is disinfected to inactivate waterborne pathogens. The most common form of disinfection is chlorination, although ozone and UV light are also used in some plants of the world. Disinfection equipment depe...
MODELISATION EN 2D DES ECOULEMENTS BRUSQUEMENT INSTATIONNAIRES DANS UN CANAL PRISMATIQUE A SURFACE LIBRE
Dans les aménagements des ressources en eau, la modélisation numérique reste toujours un moyen très fiable. En effet, par définition le modèle est un outil qui permet d’écrire un phénomène physique. Si celui-c...
L’EVAPORATION DES LACS DE BARRAGES DANS LES REGIONS ARIDES ET SEMI ARIDES : EXEMPLES ALGERIENS
Cette étude a montré que les volumes d’eau perdus par évaporation dans les lacs de barrages sont beaucoup plus supérieurs à ceux perdus par l’envasement. En moyenne, le volume perdu s’élève à 250 millions...
LA CONTAMINATION METALLIQUE DES EAUX DE SURFACE ET DES EAUX SOUTERRAINES DE LA ZONE MINIERE D’EXPLOITATION DES PHOSPHATES DE HAHOTOE-KPOGAME (SUD-TOGO) : CAS DU CADMIUM, PLOMB, CUIVRE ET NICKEL
This study aims to characterize the trace metal pollution (Cd, Pb, Ni and Cu) surface water and groundwater in the mining area of operation phosphates Hahotoè-Kpogamé to assess the health risk for people. Samples wer...