ABSTRACT
This chapter presents the analysis of the stability conditions of two slopes situated in Arenos reservoir, taking too into account that a town, named Puebla de Arenoso, is located on the top of one of the two slopes. With the information provided by the geotechnical investigation carried out, some soil profiles were elaborated that made it possible to identify the types of soils existing in the slopes: sandy coluvial sediments on a 10 m thick layer of altered marls. Arenos dam and reservoir are situated in Castellon, at the east of Spain, on Mijares river. The slopes of the reservoir have presented, since dam construction, instability problems and slides. Some calculations were performed to determine the wave height and the transient elevation of the reservoir water level due to a more or less sudden entrance of material, coming from some of the potential unstable slopes of the reservoir.
