Abstract
Techniques for measurement and analysis of the physical roughness of alluvial beds are introduced and evaluated. Precise digital elevation models (DEMs) of bed surfaces are developed using laser-scanning technology. Hydraulic roughness is represented by the standard deviation of local bed surface heights, which can be measured by physical profiling, analysis of DEMs or by a simple sand-spreading technique. Results from grain size analyses are compared with these different surface roughness determination techniques. At low relative depths the blocking of flow area by roughness elements is shown to be related to the standard deviation of local bed surface heights. A directional standard deviation is suggested for beds with structural polarization and an inclination index is introduced to identify bed imbrication.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
