The aim of this study is to determine an investigation protocol that permits the Super Sauze flowslide to be described along continuous lines, through the association of electrical and TDEM (Time-Domain Electromagnetism) methods. The transition from one resistivity range to another often corresponds to the three layer limits defined by geotechnical soundings. The results presented show that the combined methods are well suited to the question investigated and that they are validated by the geotechnical data.L'objectif de cette recherche est de determiner un protocole d'investigation permettant de decrire la structure de la coulee de Super Sauze le long de profils continus, en employant les methodes electriques et TDEM (Time-Domain Electromagnetism) associees. Le passage d'une gamme de resistivite a la suivante correspond souvent aux limites des trois terrains definies par les sondages geotechniques. Les resultats presentes montrent que les methodes employees sont adaptees a la problematique ; ils sont valides par la geotechnique.