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... : Velocity andwater depth analysis on different types of block ramps
Velocity andwater depth analysis on different types of block ramps
Author : Markus J. Studer and Anton J. Schleiss
Block ramps are used to protect rivers against dangerous bed erosion and to enhance fish migration. To ensure fish passage, hydraulic criteria like maximum flow velocities, minimal water depths and maximum water level differences must be fulfilled. A systematic laboratory study was performed in order to measure these hydraulic criteria fixed for trouts. Statistical and spatial distributions of velocities, water depths as well as the ratios of water depth and velocity head were compared for the different types of block ramps. The results have revealed that uniform block ramps can rarely satisfy the criteria for fish migration. Structured block ramps are more efficient. Nevertheless optimum conditions for fish migration can only be reached for ramp slopes under 6 %.
File Size : 1,152,361 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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