ABSTRACT
This chapter deals with cases of excavated natural soil slopes in which there is no apparent progressive acceleration of movements, that are instead irregular. It has been found that there are correlations between the increments of subhorizontal displacements, along deep slip surfaces, obtained using inclinometers, and the accumulated amounts of rain in the vicinity of the slopes. The evaluation of the behaviour and the stability conditions of instrumented slopes after construction are frequently difficult when long term movements are detected. The quality of the observation results affects, as it would be expected, the quality of the correlations that can be established. For each slope, a choice of the more reliable monitoring devices should be done, in order to make use of the proposed method.
