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dc.contributor.authorBautista-Capetillo, Carlos F.-
dc.contributor.authorRobles, O.-
dc.contributor.authorJúnez-Ferreira, H.-
dc.contributor.authorPlayán Jubillar, Enrique-
dc.date.accessioned2014-02-19T13:54:59Z-
dc.date.available2014-02-19T13:54:59Z-
dc.date.issued2014-03-
dc.identifier.citationBautista-Capetillo C, Robles O, Júnez-Ferrerira H, Playán E. Discharge coefficient analysis for triangular sharp-crested weirs using a low-speed photographic technique. Journal of Irrigation and Drainage Engineering 140 (3): 06013005 (2014)es_ES
dc.identifier.issn0733-9437-
dc.identifier.urihttp://hdl.handle.net/10261/92059-
dc.description18 Pags., 1 Tabl., 3 Figs. The definitive version is available at: http://ascelibrary.org/toc/jidedh/140/3es_ES
dc.description.abstractTriangular weirs are commonly used to measure discharge in open channel flow, representing an inexpensive, reliable methodology to monitor water allocation. In this work, a low-speed photographic technique was used to characterize the upper and lower nappe profiles of flow over fully aerated triangular weirs. A total of 112 experiments were performed covering a range of weir vertex angles (from 30° to 90°), crest elevations (8 or 10 cm), and discharges (0.01–7.82  l s−1). The experimental nappe profiles were mathematically modeled and combined with elements of free-vortex theory to derive a predictive equation for the weir discharge coefficient. Comparisons were established between measured Cd, the proposed discharge coefficient equation, and discharge coefficient equations identified in the literature. The proposed equation predicts Cd with a mean estimation error (MEE) of 0.001, a root-mean square error (RMSE) of 0.004, and an index of agreement (IA) of 0.984. In the experimental conditions of this study, this performance slightly improves that of the equation proposed by Greve in 1932, and showed the same absolute value of MEE but lower values of RMSE and IA.es_ES
dc.description.sponsorshipThis research was funded by the Secretaría de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación of the Mexican Government (SAGARPA, Mexico) and the Secretaría del Campo of Zacatecas State Government (SECAMPO, Zacatecas). Thanks are also expressed to the Universidad Autónoma of Zacatecas, Mexico. Cruz Octavio Robles Rovelo received a scholarship from the Mexican Consejo Nacional de Ciencia y Tecnología (CONACYT).es_ES
dc.language.isoenges_ES
dc.rightsopenAccesses_ES
dc.subjectWeir vertex anglees_ES
dc.subjectFlow measurementes_ES
dc.subjectFree-vortex theoryes_ES
dc.titleDischarge coefficient analysis for triangular sharp-crested weirs using a low-speed photographic techniquees_ES
dc.typeArtículoes_ES
dc.identifier.doi10.1061/(ASCE)IR.1943-4774 .0000683-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1061/(ASCE)IR.1943-4774.0000683es_ES
dc.identifier.e-issn1943-4774-
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