Valtellina disaster


Valtellina disaster

The Valtellina disaster happened in Valtellina, Northern Italian Alps, in July-August 1987. The calamity affected the provinces of Sondrio, Brescia, Bergamo, Lecco, and Como.

The disaster started from a series of meteo-hydrological events known as the "Valtellina Flood" ( _it. Alluvione della Valtellina”) which severely affected Valtellina in the second half of July. It involved heavy rainfall and glacier melting. This resulted in flooding of various rivers and creeks which impacted many villages and towns. The resulting softening of the soil destabilized accumulations of debris from pre-glacial landslides on Northern slope of the Mount Zandila (Eastern side of Pizzo Coppetto) and triggered the high-velocity Val Pola landslide. [http://valtellina.protezionecivile.regione.lombardia.it/.../documentoimpianto_esercitazione_en.pdf "Vatellina 2007"] , a civil protection national exercise ]

The debris from the Val Pola rock avalanche and landslide impounded on the Adda River creating a lake with 6 million cubic meters of water. The landslide itself obliterated 5 villages and six hamlets with 43 people died of various disaster-related causes. David Alexander, "Valtellina Landslide and Flood Emergency, Northern Italy, 1987", "Disasters", 1988, vol. 12, issue 3, pp. 212–222 doi|10.1111/j.1467-7717.1988.tb00671.x] "Natural Disasters" (1993) ISBN 1857280946, [http://books.google.com/books?id=FJki-cMoiwAC&pg=PT386&lpg=PT386&dq=valtellina+disaster&source=web&ots=t4NhiznN6-&sig=gmY257ypiHwDBZxVEwzUY5-7FLU&hl=en p. 364] ] [ [http://books.google.com/books?id=bxscy9clAToC&pg=PA71&lpg=PA71&dq=%22val+pola%22&source=web&ots=uSq1uBlpHu&sig=w3TTxTkJNc-5_px404uRO_v8PV0&hl=en "Val Pola Rock avalanche of July 28, 1987"] ] The total cost of the disaster and several months of its mitigation was about 400 million euros. [ [http://www.nat-hazards-earth-syst-sci.net/3/523/2003/nhess-3-523-2003.pdf. "Numerical modelling of large landslides stability and runout"] , "Natural Hazards and Earth System Sciences" (2003) 3: 523–538]

The resulting lake created the floodability threat, because the accumulated huge amount of water threatened to breach the debris dam and flood the Adda valley. Efforts to mitigate the threat included evacuation of about 25,000 people downstream, works to stabilize the debris tongue to prevent spill-over with subsequent dam breach, and works to drain the lake in controllable manner. [Costa, J. E.: Nature, mechanics, and mitigation of the Val Pola landslide, Valtellina, Italy, 1987–1988. Zeitschrift fur Geomorphologie 35, 15–38, 1991.]

The disaster coincided with the change of the government of Italy, including the replacement of the Minster of Civil Protection, which resulted in certain amount of policy vacuum and non-optimal decisions.

In July 2007, a civil protection national exercise "Valtellina 2007" was carried out which simulated hydraulic and hydrogeological risk similar to that of the 1987 disaster.

References


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Valtellina — or the Valtelline valley; ( it. Valtellina, de. Veltlin, rm. Vuclina) is a valley in the Lombardy region of northern Italy, bordering Switzerland. Today it is known for its skiing, its hot spring spas, its cheeses (in particular Bitto, named… …   Wikipedia

  • Val Pola landslide — The Val Pola landslide (Val Pola rock avalanche ) happened in Valtellina, Lombardy, Northern Italian Alps, on July 28, 1987 and resulted in the Valtellina disaster (destruction of villages, road closure, floodability threat) with the total cost… …   Wikipedia

  • Adda River — Infobox River | river name = Adda caption = The Adda river origin = Val Alpisella (Stelvio Pass), Italy mouth = Po River basin countries = Italy length = 313 km elevation = 2237 m discharge = 187 m³/s watershed = 7,979 km²The Adda (Latin Abdua ,… …   Wikipedia

  • Вальтеллина — Карта долины Вальтеллина (ит. Valtellina, нем. Veltlin)  долина в Италии на севере Ломбардии, к северу от Бергамо, на границе со …   Википедия

  • Landslide — This article is about the geological phenomenon. For other uses, see Landslide (disambiguation). Rockslide redirects here. For the comic book character, see Rockslide (comics). Computer simulation of a slump landslide in San Mateo County,… …   Wikipedia

  • Spain — /spayn/, n. a kingdom in SW Europe. Including the Balearic and Canary islands, 39,244,195; 194,988 sq. mi. (505,019 sq. km). Cap.: Madrid. Spanish, España. * * * Spain Introduction Spain Background: Spain s powerful world empire of the 16th and… …   Universalium

  • Capuchin Friars Minor — • An autonomous branch of the first Franciscan Order Catholic Encyclopedia. Kevin Knight. 2006. Capuchin Friars Minor     Capuchin Friars Minor      …   Catholic encyclopedia

  • Switzerland — Swiss redirects here. For other uses, see Swiss (disambiguation). Swiss Confederation redirects here. For Swiss Confederacy, see Old Swiss Confederacy. This article is about the country. For other uses, see Switzerland (disambiguation). Swiss… …   Wikipedia

  • Avalanche — This article refers to the natural event. For other uses, see Avalanche (disambiguation) An avalanche is an abrupt and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are among the biggest dangers in the… …   Wikipedia

  • List of battles 1401–1800 — List of battles: before 601 601 1400 1401 1800 1801 1900 1901 2000 2001 current See also: List of American Revolutionary War battles Early 15th Century (1401 1450) * 1402 **Battle of Casalecchio January 26 Alberico da Barbiano for Milan defeats… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.