Results 11 to 20 of about 740 (265)

Spillways on River Levees

open access: yes, 2021
Levees are built on many rivers and mountain torrents to protect populations against floods. During medium floods, a well-constructed levee offers sufficient protection without requiring additional hydraulic structures. But this same levee represents a source of danger during high floods, since there is a risk of overtopping.
Degoutte, Gérard, Tourment, Rémy
openaire   +3 more sources

Application of machine learning approaches in the computation of energy dissipation over rectangular stepped spillway

open access: yesH2Open Journal, 2023
The stepped spillway of a dam is a crucial element that serves multiple purposes in the field of river engineering. Research related to flood control necessitates an investigation into the dissipation of energy over stepped spillways.
Saurabh Pujari   +4 more
doaj   +1 more source

Effects of flow reduction and spillways on the composition and structure of benthic macroinvertebrate communities in a Brazilian river reach Efeitos da redução de vazão e construção de soleiras vertentes sobre a composição e estrutura de comunidades de macroinvertebrados bentônicos em um trecho de rio brasileiro

open access: yesBrazilian Journal of Biology, 2011
Dams are a major threat to aquatic biological diversity. By altering the natural flow of rivers, dams modify fluvial habitats, making them unsuitable for the growth and reproduction of many aquatic species.
DM. Maroneze   +3 more
doaj   +1 more source

The SIS limits and related proglacial events in the Severnaya Dvina basin, northwestern Russia: review and new data [PDF]

open access: yesBulletin of the Geological Society of Finland, 2018
Two underlying problems of the Late Quaternary history of the Scandinavian Ice Sheet (SIS) are reviewed in the paper: the position of the southeastern SIS boundary at the Late Glacial Maximum (LGM), which is still widely “migrating” depending on authors’
N.E. Zaretskaya   +2 more
doaj   +1 more source

Influence of a Modified Weir Profile on Velocity Field and Dissipation Rate in Stepped Spillways: A Comparative Study Using Physical Models and Computational Fluid Dynamics [PDF]

open access: yesJournal of Applied Fluid Mechanics
Stepped spillways are specialized hydraulic structures crafted to optimize the effective dissipation of hydraulic energy along stepped chutes. The central objective is to scrutinize and improve the mitigation of flow separation occurring from the ogee ...
H. Souli, J. Ahattab, S. Bensallam
doaj   +1 more source

SCOUR CHARACTERISTICS DOWNSTREAM CONVERGING SPILLWAYS [PDF]

open access: yesThe Egyptian International Journal of Engineering Sciences and Technology, 2016
Flow over spillways or underneath gates has a tremendous amount of potentialenergy, which is converted into kinetic energy downstream control structures.
N Taha, M Fahmy, A Habib
doaj   +1 more source

Aeration at overflow dams with curved surfaces by different flashboard spillways

open access: yesJournal of Environmental Engineering and Landscape Management, 2014
Aeration using overflow dams is an eco-friendly and economical method of improving dissolved oxygen levels in polluted urban streams. Laboratory investigations of aeration performance in smooth spillways, as well as in parallel flashboard and interlaced ...
Kejian Chu, Zulin Hua, Lijun Ji
doaj   +1 more source

The effect of triangular prismatic elements on the hydraulic performance of stepped spillways in the skimming flow regime: an experimental study and numerical modeling

open access: yesJournal of Hydroinformatics, 2022
The stepped spillway is a cost-effective hydraulic structure to dissipate the energy of large water flow over the spillway of a dam. In this study, the focus was placed on the effects of triangular prismatic elements (TPEs) on the hydraulic performance ...
Kiyoumars Roushangar   +2 more
doaj   +1 more source

Effect of Corner Shape on Hydraulic Performance of One-Cycle Rectangular Labyrinth Weirs

open access: yesFluids, 2020
The hydraulic performance of rectangular labyrinth weirs has been investigated by many researchers, however, the effects of the corner shape on the hydraulic performance of rectangular labyrinth weirs have not been addressed in the current literature ...
Omed S. Q. Yousif, Moses Karakouzian
doaj   +1 more source

Evaluation of Regression-Based Soft Computing Techniques for Estimating Energy Loss in Gabion Spillways [PDF]

open access: yesمحیط زیست و مهندسی آب, 2023
Estimation of flow energy loss in gabion spillways can be effective in managing erosion downstream of structures, flood control, and riverbed stabilization.
Reza Mobayen   +2 more
doaj   +1 more source

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