FLOW MEASUREMENTS IN ROUGH FREE OVERFALL

Year 2018, Volume: 2 Issue: 1, 8 - 12, 05.06.2018

Ahmed Y. Mohammed , Mowafaq Mohammed İnam Kasem

Abstract

In this paper, the relation
between the brink and critical depth is studied experimentally and
theoretically to predicted theoretical discharge equation using in rough free
overfall. Three different; bed rough materials, sizes and distributions were
used and tested experimentally to developed the discharge relationship. An
equation is proposed to determine the flow rate using brink depth for a channel
of known roughness, Froude number and normal depth. The equation shows that
(95) % of the estimated discharge within (4) % error of the experimental data. The
magnitude of the ratio (y_b/y_c) dependent of both the free
overfall roughness materials and its distribution, the maximum values of this
relation were happened at smooth free overfall and reduced gradually at rough one for wood material,
then more decreases for 6mm and 2mm stone material.

Keywords

free overfall, brink depth, normal depth, bed roughness

Flow Measurements in Rough Free Overall

Abstract

In this paper, the relation
between the brink and critical depth is studied experimentally and
theoretically to predicted theoretical discharge equation using in rough free
overfall. Three different; bed rough materials, sizes and distributions were
used and tested experimentally to developed the discharge relationship. An
equation is proposed to determine the flow rate using brink depth for a channel
of known roughness, Froude number and normal depth. The equation shows that
(95) % of the estimated discharge within (4) % error of the experimental data. The
magnitude of the ratio (y_b/y_c) dependent of both the free
overfall roughness materials and its distribution, the maximum values of this
relation were happened at smooth free overfall and reduced gradually at rough one for wood material, then more decreases
for 6mm and 2mm stone material

Keywords

free overfall, brink depth, normal depth, bed roughness

References

• [e-mail]