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High spatial resolution mapping of surface velocities and depths for shallow overland flow

Auteur(s) et Affiliation(s)

LEGOUT, C.
UJF-Grenoble 1/CNRS/G-INP/IRD, LTHE UMR 5564, Grenoble, France
DARBOUX, F.
INRA, UR0272, UR Science du sol, Centre de recherche, Orléans, France
NÉDÉLEC, Y.
CETE du Sud-Ouest / Dep. Lab. Bordeaux / Groupe Géotechnique, Risques et Bâtiments, Bordeaux, France
HAUET, A.
EDF-Centre Hydrométéorologique Pyrénées Massif Central, Toulouse, France
ESTEVES, M.
IRD/UJF-Grenoble 1/CNRS/G-INP/, LTHE UMR 5564, Grenoble, France
RENAUX, B.
INRA, UR0272, UR Science du sol, Centre de recherche, Orléans, France
DENIS, H.
CNRS/UJF-Grenoble 1/G-INP/IRD, LTHE UMR 5564, Grenoble, France
CORDIER, S.
CNRS/U Orléans/MAPMO, Orléans, France


Description :
The AA. present the coupling of 2 techniques allowing to obtain spatial data of flow depth and surface velocity measurements for water depths ranging from a few millimetres to a few centimetres. The large scale particle image velocimetry (LSPIV) procedure was a robust method to obtain surface velocity measurements with a relatively low sensitivity to parameter changes. Comparison with measurements performed with hot film anemometer and salt velocity gauge showed that LSPIV surface velocities were representative of the flow. Water depths measured with the laser scanner were also in good agreement with single-point measurements performed with a dial indicator. Spatially-distributed flow rates could be computed by combining both presented techniques with a mean relative error less than 20%.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2012, vol. 37, n°. 9, p. 984-993, nombre de pages : 10, Références bibliographiques : 1 p.

Date :
2012

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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