HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Optical method for measuring bed topography and flow depth in an experimental flume

Abstract : We describe an optical method known as moiré for acquiring quasi-simultaneous measurements of bed topography and flow depth in laboratory experiments. The moiré method is based on projecting a fringe pattern (grating) on the bed and analyzing the deformation of the pattern caused by the topography with respect to a reference plane. The height of the object is encoded in the phase of the pattern and can be retrieved either through Fourier transform or phase shifting algorithms. The methodology enables image-based non-contact measurements over a continuous surface at very high spatial and temporal resolutions. We use a commercial software package of a moiré method called Light3D to map bed topography and flow depth in an experimental braided channel and demonstrate how the method can be used to characterize a full range of statistics not previously possible.
Document type :
Journal articles
Complete list of metadata

Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Friday, March 11, 2022 - 8:06:21 PM
Last modification on : Sunday, March 13, 2022 - 3:25:51 AM


Publisher files allowed on an open archive


Distributed under a Creative Commons Attribution 4.0 International License



A. Limare, M. Tal, M. D. Reitz, E. Lajeunesse, F. Métivier. Optical method for measuring bed topography and flow depth in an experimental flume. Solid Earth Discussions, 2011, 3, pp.187-215. ⟨10.5194/sed-3-187-2011⟩. ⟨insu-03606492⟩



Record views


Files downloads