Studio delle problematiche delle infiltrazioni e perdite della diga di Medau Zirimilis (Sardegna SW)

The costruction earthfill dam Medau Zirimilis, in the territory of Siliqua (SW Sardinia), began in 1989 and ended in 1991. Over the years, a time series of experimental basins, showed several problems of leakage and filtration in dam body. In the present work, through the application of classical methods of hydrogeology and applied, we have studied the problems of infiltration and loss of earth dam of Medau Zirimilis. The research has tried to examine the causes of the existing problems and identify possible solutions. The work of investigation has been developed from the acquisition of a basic knowledge of the geological characteristics of the tax of the dam and its surroundings. The understanding of its technical and constructional features and behavior had the objective to increase the level of reservoir . For this purpose, during the research have been acquired experimental data on levels in various types of water wells and drainage of the dam. Through the elaboration and interpretation with GIS methodologies and software, the attempt of this research was to reconstruct the model of the aquifer and to identify possible preferential of flow paths. Always with the purpose of identifying pathways of water, we have been carried out a study on the mantle of coating internal hangings of the bank barrage made in bituminous conglomerate, applying innovative methodologies, techniques by such as non-destructive surveys to infrared thermography.