Flow and Energy Dissipation over Stepped Gabion Weirs
Publication: Journal of Hydraulic Engineering
Volume 118, Issue 5
Abstract
Gabions are a common construction material in the African Sahel and elsewhere, especially for spillways. Stepped gabion spillways are structurally stable, resistant to water loads, and efficient energy dissipators, but there are no clear design rules to date. One‐fifth‐scale model tests representing 3–5 m high standard prototypes discharging up to enabled us to establish quantified energy‐dissipation criteria and efficient stilling‐basin design rules, saving 10–30% on basin length as compared with current methods. The different types of flow over the stepped face are also described and analyzed: isolated nappe flow, partial nappe flow, and skimming flow. From a technical point of view, stepped gabion spillways can withstand flows up to without great damage, if setting of gabions complies faithfully with the code of practice. Some advice is given on preventing gabion deformation.
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References
1.
Agostini, R., Bizzari, A., and Masetti, M. (1987). Ouvrages flexibles pour trongons torrentiels et fluviaux (Part 1 Ouvrages transversaux) (in French). France Gabions s.a., Le Pouzin, France.
2.
Design of small dams. (1987). U.S. Bureau of Reclamation, Denver, Colo.
3.
Durand, J. M. (1989). “Etudes des variantes techniques dans la conception des petits barrages en terre au Burkina Faso.” Report, CEMAGREF, Le Tholonet, France.
4.
Essery, S., and Horner, W. (1978). “The hydraulic design of stepped spillways.” Report 33, Construction Industry Research and Information Association, London, England.
5.
“Les Ouvrages en gabions” (in French). (1992). Collection techniques rurales en Afrique, Ministère de la Coopération, Paris, France.
6.
Peyras, L. (1990). “Etude de la dissipation de l'énergie sur les déversoirs en gradins de gabions” (in French). Report, CEMAGREF, Le Tholonet, France.
7.
Rajaratnam, N. (1990). “Skimming flow in stepped spillways.” J. Hydr. Engrg., ASCE, 116(4), 587–591.
8.
Rand, W. (1955). Flow geometry at straight drop spillways.” Proc., ASCE, ASCE, 81, 1–13.
9.
Sorensen, R. M. (1985). “Stepped spillway hydraulic model investigation.” J. Hydr. Engrg., ASCE, 111(12), 1461–1472.
10.
Stephenson, D. (1979a). “Gabion energy dissipators.” Q5R3, Proc., 13th ICOLD Congress, CIGB, Paris, France, 33–43.
11.
Stephenson, D. (1979b). “Rockfill in hydraulic engineering.” Developments in Geotechnical Engineering Collection, Vol. 27, Elsevier Scientific Publishing Co.
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Copyright © 1992 ASCE.
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Published online: May 1, 1992
Published in print: May 1992
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