Tuve landslide

The Tuve landslide was a large landslide in Tuve, Gothenburg, Sweden on November 30, 1977. Some 67 houses were destroyed, killing 9, injuring about 60 and making around 600 people homeless.[1] The slide began at 16.05 and lasted 5–6 minutes.[1] The slide affected 270 000 square meters (27 hectares).[2] About 600 people lived in the area; of these, approximately 200 were in the area at the time of the slide. About 100 needed help by rescue workers.[1] It was the most severe landslide in the modern history of Sweden.[2]

Close to one kilometer of the nearby road was destroyed. It is estimated that three to four million cubic meters of soil were involved in the slide and further would not have fertility to grow crops.[1] The total economic cost of the slide has been estimated to 140 million SEK (15 million EUR, 22 million USD).[1]

Tuveraset GNM7033-002
Aerial photograph over the affected area

Cause

The slide was caused by heavy rain and an unstable slope.[3][4]

Aftermath

After the slide it was concluded that many areas were built without a proper prior geotechnical investigation. It was decided to chart up the stability of built-up areas of municipalities.[5]

References

  1. ^ a b c d e "Katastrofen i Tuve" (in Swedish). City of Gothenburg - Tuve-Säve. 2007-04-02. Retrieved 2008-08-17.
  2. ^ a b "Landslides and gullies". Geological Survey of Sweden. Archived from the original on February 1, 2009. Retrieved 2008-08-17.
  3. ^ "Tuveraset på Hisingen kräver åtta människoliv". Katrineholms-Kuriren (in Swedish). 2002-11-30. Retrieved 2008-08-17.
  4. ^ Duncan, J.M.; G. Lefebvre; P. Lade (1980). The Landslide At Tuve, near Goteborg, Sweden On November 30, 1977. Washington: National Academy Press. Retrieved 2009-08-15.
  5. ^ Edwards, Janet (2004-06-17). "National reporting and information on disaster reduction for the World Conference on Disaster Reduction, 18–22 January 2005, Kobe, Japan" (PDF). Rescue Services Agency. Retrieved 2008-08-17.

Further resources

  • Sveriges Radio P3 Dokumentär: Raskatastrofen i Tuve by Kristofer Hansson. First broadcast on 5 oktober 2008 18.03-20.00. [1]. Radio documentary with interviews.

Coordinates: 57°45′41″N 11°56′19″E / 57.7614°N 11.9386°E

Göta älv

The Göta älv (Swedish pronunciation: [¹jøːta ¹ɛlv]; "River of the Geats") is a river that drains lake Vänern into the Kattegat, at the city of Gothenburg, on the western coast of Sweden. It was formed at the end of the last glaciation, as an outflow channel from the Baltic Ice Lake to the Atlantic Ocean and nowadays it has the largest drainage basin in Scandinavia.

The Göta älv is located in Götaland, with the river itself being a site of early Geatish settlement. Its length is 93 km (58 mi). The Bohus Fortress is located by the river at Kungälv. There the river splits into two, with the northern part being the Nordre älv and the southern part keeping the name Göta älv.

At Trollhättan there is a dam, canal locks and a hydropower station in the river. The locks make the river navigable, even for large cargo vessels (88 m [289 ft] long). The artificial parts are called Trollhätte Canal. The river and the canal is part of a mostly inland waterway, Göta Canal, which spans the width of Sweden to the Baltic Sea south of Stockholm.

The power station supplied electric power to the heavy steel industry concentrated around Trollhättan Falls, contributing to its industrial revolution. In the summer months the spillway of the dam is opened for a few minutes daily and tourists gather to see the water rushing down the river (picture).

There are concerns about whether the maximum permitted discharge of 1,000 m3/s (35,000 cu ft/s) is enough in a scenario where heavy rain floods the lake Vänern, causing considerable damage. Previously this was thought not to be possible in reality, but in 2001 the lake was flooded almost 1 m (3 ft) above maximum level (and some upstream lakes like Glafsfjorden flooded 3 m [10 ft]). In this situation, Göta älv was allowed a discharge of 1,100 m3/s (39,000 cu ft/s) for months causing a big risk of landslides. Now a water tunnel between Vänersborg and Uddevalla is considered as a rescue solution.

There is a large risk of landslides along the river and historical records of 15 landslides exist. The largest occurred in the years 1150, 1648, 1950, 1957 and 1977 (Tuve landslide).

Landslide

The term landslide or less frequently, landslip, refers to several forms of mass wasting that include a wide range of ground movements, such as rockfalls, deep-seated slope failures, mudflows, and debris flows. Landslides occur in a variety of environments, characterized by either steep or gentle slope gradients, from mountain ranges to coastal cliffs or even underwater, in which case they are called submarine landslides. Gravity is the primary driving force for a landslide to occur, but there are other factors affecting slope stability that produce specific conditions that make a slope prone to failure. In many cases, the landslide is triggered by a specific event (such as a heavy rainfall, an earthquake, a slope cut to build a road, and many others), although this is not always identifiable.

List of landslides

This list of landslides is a list of notable landslides and mudflows divided into sections by date and type. This list is very incomplete as there is no central catalogue for landslides, although some for individual countries/areas do exist. Volumes of landslides are recorded in the scientific literature using cubic kilometres (km3) for the largest and millions of cubic metres (normally given the non-standard shortening of MCM) for most events.

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