f Estimation of water retaining properties of rocks from seismic and resistivity data in North Greece

Estimating the water-retaining properties of rocks is a complicated problem which requires compound investigations. Few reservoirs can be considered watertight, while most of them require geotechnical investigations to a smaller or greater extent. The water loss paths are very complicated and often unexpected, while seepage may also exceed the permissble limits. The case study given by this paper illustrates the importance of the advanced interpretational techniques used, in examining the watertightness conditions of llarion reservoir on Aliakmon river.