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Caractéristiques radiologiques des canaux de transport d’eau – Exemple du réseau hydraulique régional Languedoc Roussillon

Published online by Cambridge University Press:  19 February 2014

F. Eyrolle-Boyer
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
Ph. Renaud
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
F. Le Dore
Affiliation:
BRL Direction Générale, 1105 avenue Pierre Mendès France, BP 94001, 30001 Nîmes Cedex 5, France
D. Tournieux
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
D. Claval
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
J.-F. Blanchet
Affiliation:
BRL Direction Générale, 1105 avenue Pierre Mendès France, BP 94001, 30001 Nîmes Cedex 5, France
C. Antonelli
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
M. Zebracki
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
C. Cossonnet
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
B. Boulet
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
X. Cagnat
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
A. Devisme
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
R. Gurriaran
Affiliation:
IRSN, PRP-ENV/SESURE/LS3E, STEME/LMRE, SESURE/LERCM, BP 3, 13115 Saint Paul Lez Durance, France
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Abstract

Une étude radioécologique a été menée sur les canaux rhodaniens du réseau hydraulique régional propriété de la région Languedoc Roussillon, gérés par BRL. Ces canaux transfèrent de l’eau du fleuve Rhône vers les territoires des départements du Gard et de l’Hérault à des fins d’irrigation et de production d’eau potable. Nos résultats montrent que les caractéristiques hydrauliques intrinsèques des canaux de transport d’eau influent sur la distribution solide/solution des éléments traces en transit et par conséquent sur leur transfert vers les milieux récepteurs. Si les concentrations en phase dissoute (eau filtrée) sont conservées, les concentrations en phase particulaire (matières en suspension et sédiments) sont significativement modifiées au cours du transit. Outre la ségrégation granulométrique des particules entre l’amont et l’aval du système, ces résultats sont très probablement liés à la production biologique autochtone (phyto et zooplancton). Ces résultats originaux soulignent le caractère atypique des canaux de transport d’eau quant au transfert des éléments potentiellement contaminants.

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© EDP Sciences, 2014

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Caractéristiques radiologiques des canaux de transport d’eau – Exemple du réseau hydraulique régional Languedoc Roussillon
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