Dam and Deviation Tunnel for the Control of a Torrent Upstream a Landslide
In a valley in the southern side of the Rethic Alps a landslide made of detrital materials is continui-sly moving mainly during the snow melting months. Its speed reaches 1 cm/day. The total volume of the landslide is estimated at about 20 million m3. Its final fall would close the valley with a 90–105 m high epankment obstruction. Consequently a 2 million m3 storage reservoir would be formed. The water overflowing such obstruction would quickly cause its collapse and the sudden release of the impounded water would flood an important town 3 km downstream, with incalculable damages. The local Authorities charged the authors of this paper to study the measures best suited to limit the damages consequent to the landslide fall.
KeywordsStream Flow Snow Melting Hydroelectric Plant Detrital Material Sudden Release
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