نتایج جستجو برای: weirs
تعداد نتایج: 519 فیلتر نتایج به سال:
For the last decades, the design floods of numerous embankment reservoirs were re-evaluated, and the revised spillway outflows are typically larger than those used in the original designs. As a result, a number of overtopping protection systems were developed for embankments and earthfill dams, with applications encompassing river dykes, coastal barriers for storm surge and tsunami protections....
The effect of Anguillicola crassus, Pseudodactylogyrus bini and Pseudodactylogyrus anguillae infection on the behaviour of downstream migrating adult European eels Anguilla anguilla as they encountered accelerating water velocity, common at engineered structures where flow is constricted (e.g. weirs and bypass systems), was evaluated in an experimental flume. The probability of reacting to, and...
For overflow weirs and embankments, the stepped chute profile may increase the rate of energy dissipation on the waterway. Herein four different stepped chute configurations were tested with a focus on the cavity flow processes, flow aeration and energy dissipation performances. Detailed flow visualisations and air-water flow measurements were conducted for all configurations. The results highl...
Pivot weirs are one of the most important structures for regulating water level in rivers and canals. These constructed with or more gates a row waterways. Changing angle each gate is done individually an independent system. Based on available information, hydraulic performance this type (especially several different angles) operational conditions has not been investigated. In present study, pi...
Over the past decades, significant advances have been achieved in hydraulic structures for dams, namely water release such as spillway weirs, chutes, and energy dissipators. This editorial presents a brief overview of eleven papers this Special Issue, Advances Spillway Hydraulics: From Theory to Practice, frames them current research trends. Issue explores following topics: inlet structures, tr...
Artificial barriers on lowland rivers impede the spawning migrations of anadromous fishes, preventing access to historical areas. In cryptic European shads Alosa alosa and fallax (‘shad’ hereafter), this has resulted in population declines across their range. Conservation programmes aim facilitate passage migrators over these so require baseline information spatial temporal extent current migra...
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