Debris Flow Events (1)
Debris flow occurrences
Generally, steep mountainous regions which are mantled by a cover of unconsolidated soils and sediments are particularly susceptible to various types of water-related mass movement’s, namely debris flows. These steepland regions are often overwhelmed with high-intensity storms and extreme rainfall events, which are responsible for sudden water inflows which, on the one hand can lead to slope failures and landslides, and on the other can develop debris flows, if there are debris or unconsolidated materials availability. These requirements are met in many mountainous watersheds under different climatic conditions, turning debris flows into a widespread worldwide phenomenon.
Among the countries most affected by debris flows, there are few that stand out, namely Venezuela, Japan, China, Thailand, Nepal, Indonesia, Philippines, Italy, Switzerland, France, Germany, Portugal, Slovenia, Colombia, United States of America, Peru, Australia, among others.
Image Gallery
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Venezuela, Caraballeda city, state of Vargas after 15-16th December 1999 debris flow
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Portugal, Funchal city, Madeira Island, after February 2010 debris flow
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Portugal, Funchal city, Madeira Island, after February 2010 debris flow
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Guinsaugon village, Philippines after 17th February 2006 debris flow. (Evans, et al., 2007)
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Portugal, São João stream, Madeira Island, after February 2010 debris flow
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Venezuela, Caraballeda city, state of Vargas on 15-16th December 1999. (http://upload.wikimedia.org)
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Boulders near La Guaira, Venezuela on 1999. (Larsen, et al., 2001)
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Portugal, São João stream, Madeira Island, after February 2010 debris flow. (Valente, 2010)
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Teresópolis, Rio de Janeiro state, Brazil, 2011. (http://upload.wikimedia.org)