| Autor: |
Alexander Strom, A. N. Makhinov, Michael E. Kharitonov, Vladimir Kim, Igor Fomenko, O.V. Zerkal |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Understanding and Reducing Landslide Disaster Risk ISBN: 9783030603182 |
| DOI: |
10.1007/978-3-030-60319-9_11 |
| Popis: |
The Bureya landslide was formed on December 11, 2018 in the Bureya River valley in the Far East of Russia. It affected metamorphic rocks of the Upper Proterozoic age. The peculiarity of this rock slope failure was that it occurred in winter when air temperature dropped from ca. −3 °C to −37 °C. Landslide had complex structure and was formed in several stages with variable displacement mechanism. The first stage of main displacement can be classified as wedge failure transformed into rock avalanche more than 700 m long (measured from the slope foot) that moved with velocity up to 25–26 m/s. Landslide collapsed into reservoir and formed the splash wave up to 60 m high that washed out the taiga forest on the opposite slope of the valley. During the second stage that followed the first one in few seconds, large block of rock (260 × 280 m) slid down from the eastern part of the headscarp and formed rock avalanche up to 860 m long. The mean velocity of its motion was ~23–25 m/s, while the maximal one in its front could reach ~60 m/s. During the last stage several smaller secondary slides occurred on the slopes of the main landslide body and within the main headscarp. The total volume of the affected rocks can be estimated as 25 million m3, up to 12 million m3 of which were displaced during the first stage, up to 11.8 million m3—during the second stage and up to 1.2 million m3—during the secondary landslides formation. The Bureya landslide formed the natural dam more than 70 m high and up to 550 m wide that split the reservoir into two parts, so that special measures had to be undertaken to restore normal water flow. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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