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 : Influence of leaf mass on drag forces in vegetated flows
Influence of leaf mass on drag forces in vegetated flows
Author : J. Aberle1, T. Schoneboom1,2 and B. Rhiner3
Hydraulic resistance of floodplain flows depends on the drag exerted by the plants, which for natural vegetation, depends on biomechanical and structural properties as well as foliage. However, until today, most studies related to the estimation of flow resistance of emergent vegetation have been carried out under idealised conditions using cylindrical roughness elements, regular element spacing, etc. Only few studies focused on the influence of the leaf mass distribution on flow resistance and the flow field. In this study, preliminary results of a study are presented, in which direct and simultaneous measurements of drag forces exerted by artificial flexible elements with different leaf mass are used to investigate the influence of leaf mass on drag forces, flow resistance, and the flow field. The results are discussed with respect to flexibility, vertical leaf mass distribution and hydraulics.
File Size : 3,391,179 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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