We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Velocity profiles in a real vegetated channel.
- Authors
Cassan, Ludovic; Belaud, Gilles; Baume, Jean; Dejean, Cyril; Moulin, Frederic
- Abstract
Most of the studies regarding vegetation effects on velocity profiles are based on laboratory experiments. The main focus of this paper is to show how the laboratory knowledge established for submerged vegetation applies to real-scale systems affected by vegetation growth (mainly Ranunculus fluitans). To do so, experiments are conducted at two gage stations of an operational irrigation system. The analysis of first- and second-order fluctuations of velocities is based on field measurements performed by micro-acoustic doppler velocimeter during 8 months, completed with flow measurement campaigns in different seasons. The Reynolds stresses are used to determine shear velocities and deflected plant heights. Then, the modified log-wake law (MLWL), initially derived from laboratory flume experiments, is applied with a unique parametrisation for the whole set of velocity profiles. The MLWL, along with a lateral distribution function, is used to calculate the discharge and to show the influence of vegetation height on the stage-discharge relationships.
- Subjects
GRASSED waterways; VELOCITY; SPEED; FLUID mechanics; FLUID dynamics
- Publication
Environmental Fluid Mechanics, 2015, Vol 15, Issue 6, p1263
- ISSN
1567-7419
- Publication type
Article
- DOI
10.1007/s10652-015-9417-0