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 : 35th IAHR Congress - Chengdu (2013) : THEME 4 - HYDRO-ENVIRONMENT : Spatial-structural Analysis of Woody Riparian Vegetation for Hydraulic Considerations
Spatial-structural Analysis of Woody Riparian Vegetation for Hydraulic Considerations
Author : Clemens Weissteiner, Johann Peter Rauch, Johanna Jalonen and Juha J„rvel„
Reliable determination of resistance exerted by trees on flow calls for physically based c haracterization of complex plant structure. This paper investigates the structural composition of four common riparian species (Alnusglutinosa, Betulapendula,Betulapubescens, Salixcaprea). For this purpose, 3D tree models were constructed by digitising twenty 0.9-3.3 m tall specimens on branch level in leafless condition. Three porosity definitions were explored to derive further information on the physical configuration of the trees. Branches contributed on average 55-60% to the total projected area. It was shown that the basal diameter could be used to predict the total projected area. However, a non-linear vertical distribution of the total projected area was found for taller (>~2m), branch dominated specimens of Alnusglutinosa and Salix caprea. Finally, it was concluded that detailed spatial-structural analyses of complex riparian trees provide valuable information for improving the estimation of vegetative flow resistance.
File Size : 711,729 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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