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La sicurezza delle opere di sbarramento nei riguardi della propagazione delle onde di piena
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Air Inlet valve as a protection device against water hammer
No full textThis paper reports the results of a theoretical and experimental investigation to prove the effectiveness of an air inlet valve as a protection device against water hammer in delivery mains of pumping stations where, upon sudden stopping of pumps, cavitation conditions may occur close to the station. Theoretical research has proved that the valve, though simple and of very low cost, can considerably reduce pressure rise resulting from unsteady flow and the first experimental results fully confirm the forecasts of the theoretical model
Alcune considerazioni sul proporzionamento degli sfioratori a calice
No full textThe regulations of dams, which have been recently modernized in Italy, introduced special constraints for the design of morning glory spillways when they are used to evacuate reservoir floods in fill dams. Based on these instructions, the design of such works should be subject to the saturation condition and their feasibility to geometrical and physical constraints. A numerical investigation has been carried out, giving to the parameters appearing in the formulas the most adequate values resulting from either theoretical or experimental studies. The results of this investigation proved the influence of the new regulations upon the feasibility limits of such works. Moreover, it seems possible to extend the use of morning glory spillways by shaping adequately the well and the connecting curved duct to the tunnel
I processi di erosione nel bacino della Diga di Abate Alonia: analisi fenomenologica e modelli di previsione
No full textEvaluation of soil potential erodibility by means of a multifractal temporal model of rainfall
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I processi erosivi nel bacino della diga di Abate Alonia: analisi fenomenologia e modelli di previsione
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