Evaluation of Water Energy Dissipation over Spillway through the Improved Reversed Flow
DOI:
https://doi.org/10.65405/n8bd4027Keywords:
Spillway, energy dissipation, reversed flow, hydraulic jump, stilling basin>Abstract
In order to avoid downstream scouring and structural failure, efficient energy dissipation is essential to the safe and cost-effective operation of dam spillways. The use of a counter-flow or cross-jet to regulate hydraulic jumps is the main topic of this paper's analysis of the mechanics and effectiveness of an enhanced reversed flow energy dissipation technique. Reversed flow techniques greatly reduce the necessary stilling basin length by generating a forced hydraulic jump, which lowers construction costs and improves structural safety. This study summarizes analytical and experimental results from important studies, showing that these techniques can significantly shorten stilling basin length and hydraulic jump length. The results demonstrate the potential of reversed flow dissipators as a reliable and effective substitute for traditional energy dissipators, especially in high-velocity flow situations where abrasion and cavitation present serious risks.
Downloads
References
Alghwail, A. D. A. (2016). Alleviation the scouring problem downstream of dam spillways through a reversed cross-jet flow dissipator. International Conference on Hydraulic Engineering.
Alghwail, A. D. A., Stevović, S., & Abourohiem, M. A. (2018). Dissipation of mechanical energy over spillway through counter flow. Građevinar, 70(5), 377-391. https://doi.org/10.14256/JCE.1691.2016
Amador, A., Sánchez-Juny, M., & Dolz, J. (2009). Characterization of the nonserated flow region in a stepped spillway. Journal of Hydraulic Engineering, 135(7), 572-582.
Bhowmik, N. G. (1975). Stilling basin design for low Froude number. Journal of the Hydraulics Division, 101(HY7), 901-915.
Boes, R. M., & Hager, W. H. (2003). Two-phase flow characteristics of stepped spillways. Journal of Hydraulic Engineering, 129(9), 661-670.
Kao, D. T. (1974). The effect of floor jet on the hydraulic jump [Unpublished doctoral dissertation]. University of Iowa.
Komora, J. (1970). A new energy dissipator. Proceedings of the International Association for Hydraulic Research (IAHR).
Almuntasir, S. Y., Elmuaget, H. M., ALtarabulsi, D. J., & Salah, A. B. (2026). The Impact of Environmental Awareness on Sustainable Water Conservation Behavior among Postgraduate Students: Field Study. Al-Farooq Journal of Sciences, 2(4), 315-331.
Meshkati Shahmirzadi, M. E., Sumi, T., & Kantoush, S. A. (2012). The effect of in-ground stilling basin geometry combined by slit-type end-sill on flow pattern and energy dissipation below the flood mitigation dams. IAHR.
Vollmer, E., & Khader, M. H. A. (1970). New energy dissipator for high head dams. Journal of the Hydraulics Division, 96(HY12), 2547-2561.
