Identifying the origin of groundwater and flow processes in complex landslides affecting black marls : insights from a hydrochemical survey

Auteurs :
DE MONTETY, V.
MARC, V.
EMBLANCH, C.
MALET, J.-P.
BERTRAND, C.
MAQUAIRE, O.
BOGAARD, T.A.

Description :
The Super-Sauze mudslide is a persistently active slow-moving landslide occuring in the black marl outcrops of the French South Alps. To look closer at the processes involved and especially to gain a better idea of the origin and pathways of the waters, a hydrochemical study was carried out from May 2003 to May 2004. Results showed that the groundwater chemistry could not be fully explained by rainfall recharge or simple water-matrix equilibrium. A contribution of saline waters coming from the bottom of a thrust sheet overhanging the landslide was required to get the observed high mineralization.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2007, vol. 32, n°. 1, p. 32-48, nombre de pages : 17, Collation : Illustration, Références bibliographiques : 42 ref.

Date :
2007

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