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 : 34th Congress - Brisbane (2011) : THEME 5: Environmental Hydraulics and Hydrology : Drag coefficients and forces for boulders on block ramps
Drag coefficients and forces for boulders on block ramps
Author : M. Oertel, S. Peterseim and A. Schlenkhoff
Nowadays it is popular to conquer large bottom steps in rivers with so called block ramps. These give nature like solutions with climb possibilities for fishes and adequate energy dissipation. German guidelines are dealing with constant drag coefficients to calculate forces on a single boulder and the total loss coefficient on the ramp. Investigations on a scaled physical model show that the drag coefficients vary in a larger range, depending on the arrangement of the boulders, the slope etc. This paper is dealing with a physical model with varying boulder configurations, slopes and discharges. Forces on the boulders are measured directly and drag coefficients are calculated.
File Size : 759,804 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 5: Environmental Hydraulics and Hydrology
Date Published : 01/07/2011
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