B. Fruneau et J. Achache, DETECTION OF THE SAINT-ETIENNE-DE-TINEE LANDSLIDE USING SAR INTERFEROMETRY AND MODELING, Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 320(9), 1995, pp. 809-816
SAR interferometry allows the detection of very smalt ground surface m
otion (centimetre scale) with high spatial resolution and dense covera
ge. It can lead to the construction of a continuous displacement field
. Using this technique, the landslide of St-Etienne-de-Tinee in the Fr
ench Alps (44.25 degrees N, 6.96 degrees E) is studied. Surface displa
cements are determined using an interferogram built with two SAR image
s taken 9 days apart in August 1991. Synthetic interferograms, calcula
ted for different sliding models, allow us to determine the style of d
eformation. A translational sliding model with a gradient of displacem
ent from top to bottom, on which three shear zones corresponding to N2
0 degrees sub-vertical faults are superimposed, account for the observ
ed fringes.