Apport d'eau lié à la fonte nivale et restitution en tête de bassin versant cristallin à l'échelle locale : exemple du Lignon du Forez, Massif Central, France

Abstract : This   article   takes   part   in   the   study   of   hydrosystems   interfaces,   a   tricky   discipline   in   mountain   hydrol-­ ogy,   due   to   the   inconstant   behavior   of   the   exchanges   between   snow,   soils   and   substratum.   The   main   goal   is   to   assess   the   exchanges   of   the   snow   melting   and   its   restitution   in   the   top   of   a   mid-­mountain   watershed   (Lignon   du   Forez,   Massif   Central,   France).   The   glacial   heritage   of   the   study   area   shows   a   favorable   configuration   for   the   Lignon   river   springs.     The   Northern   spring   seems   to   depend   soil   configuration   and   snow   accumulation   of   the   watershed   during   winter.   A   focus   has   been   done   on   the   snow   accumulation   and   the   snow   water   equivalent,   then   a   monitoring   of   infiltration,   and   finally   its   restitution   at   the   spring. The   mapping   of   snow   accumulation   and   snow   water   equivalent   were   conducted   with   ground   penetrating radar.   This   method   has   been   used   again   to   investigate   and   to   map   soils   depths,   where   this   soil   thickness   acts   as   an   unconfined   aqui-­ fer   in   certain   years. The   infiltration   monitoring   has   been   done   during   winter   and   melting   time   thanks   to   a   pit   dug   up   in   the   soil   and   equipped   with   Time   Domain   Reflectometry   temperature   and   moisture   probes.   This   monitoring   station   can   detect   snow   presence   on   the   ground   indirectly,   and   can   give   a   melting   rate   estimation   of   the   snow. The   volume   of   water   given   by   snow   melting   is   quantified   at   the   spring   of   the   river,   where   melting   flows   are   clearly   vis-­ ible   in   annual   flows.
Document type :
Journal articles
Complete list of metadatas

https://hal-univ-lyon1.archives-ouvertes.fr/hal-02146668
Contributor : Nathalie Lyvet <>
Submitted on : Tuesday, June 4, 2019 - 10:54:58 AM
Last modification on : Wednesday, June 5, 2019 - 1:36:36 AM

Identifiers

Citation

Gaël Bouron, Thierry Winiarski, Djamel Mimoun, Didier Graillot. Apport d'eau lié à la fonte nivale et restitution en tête de bassin versant cristallin à l'échelle locale : exemple du Lignon du Forez, Massif Central, France. La Houille Blanche - Revue internationale de l'eau, EDP Sciences, 2014, pp.69-78. ⟨10.1051/lhb/2014053⟩. ⟨hal-02146668⟩

Share

Metrics

Record views

17