IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 33rd Congress - Vancouver (2009) : Topic C: Water Engineering for the Protection and Enhancement of Natural Watershed/Aquifer Environme... : A model study of the hydraulics related to fish passage through embedded culverts
A model study of the hydraulics related to fish passage through embedded culverts
Author : M.E.Garner, J.A. Kells and C. Katopodis
Culvert embedment, which involves setting the invert below the normal stream bed elevation, is a simple and inexpensive method of increasing the flow area in a culvert flowing part-full. Embedment has been proposed as a way to decrease the mean flow velocity for the purpose of facilitating fish passage. This paper presents the preliminary findings from a model study of the velocity and turbulence distributions within an embedded CSP culvert. In the study, an acoustic Doppler velocimeter was used to measure point velocities throughout the flow field at several cross sections located along the length of the culvert. The hydraulic conditions were varied by changing the flow rate and the embedment depth. The results confirm that embedding a culvert significantly reduces the flow velocities throughout the cross section and therefore may improve conditions for fish passage. It was also found that embedding the culvert did not decrease the peak turbulence intensities near the culvert inlet, however they were reduced beyond approximately one culvert diameter downstream from the inlet.
File Size : 486,058 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 33rd Congress - Vancouver (2009)
Article : Topic C: Water Engineering for the Protection and Enhancement of Natural Watershed/Aquifer Environments
Date Published : 09/08/2009
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