Author(s)

B. Molino, A. Sole & G. Zuccaro

Abstract

Analysis of data relating to artificial reservoirs rehabilitation, in order to remove the sediments due to the solid transport, is useh1 for a correct water supply management. The present study analyses the effects of the concomitant emission of the siphoned water-sediment mixture and water discharged through dam drains. It has three main objectives: - rehabilitation of artificial reservoir in close relationship to environmental balance; - the reduction of sediment in the mixture emitted into the river bed to levels compatible with environmental regulations; - the definition of hydrodynamic conveyance, which is able to guarantee the transport of released sediment. The proposed analysis has been applied in the pilot reservoir Camastra (Potenza, Southern Italy). Ten years of observational data regarding rainfall, discharge and flow rate discharged through drains are available for this site. Grain size distribution analysis of sediments deposited on the lakebed was carried out and the geometric and hydraulic characteristics of the riverbed down valley from the dam are known. The first results obtained show that this method, in this study case, enables the carrying out of the rehabilitation of the reservoir withm environmental compatible parameters

Keywords