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The Mori-Torbole Tunnel (Italian: ''Galleria Adige-Garda'') is a diversion tunnel completed in 1959 between the Italian towns of Mori and Nago-Torbole to connect the Adige river with Lake Garda. Its function is to reduce water levels in the river upstream of the province of Verona by discharging excess water into the lake. The tunnel reduces the risk of flooding in Verona and environs from once every seventy years to once every two centuries. To increase the level of Lake Garda by 1 cm, the tunnel must divert about 3,700,000 m³ of water. When the tunnel is open, the lake's turbidity increases. The sudden influx of the Adige's water, which is both appreciably colder and more polluted than the lake's, causes a considerable heat shock and significantly worsens the habitat for fish. For these reasons the tunnel is used only on the rare occasion when there is a flood risk in the Veronese basin. ==Main characteristics== * Length: 9,873 m * Share of lead: 161 m A.M.S.L * Opening level: 55 m A.M.S.L * Difference: 106 m * Slope: 0.8688% * Average diameter: 8 m * Hydraulic section: 50.40 m² * Maximum capacity: 500 m³/s * Water speed at the maximum capacity: 11 m/s * Water speed at the minimum flow : 5 m/s 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mori-Torbole tunnel」の詳細全文を読む スポンサード リンク
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