PRECIPITATION-LANDSLIDE RELATION IN THE CITY OF SÃO BERNARDO DO CAMPO - SP
DOI:
https://doi.org/10.5902/2179460X16214Keywords:
Precipitação, São Bernardo do Campo, DeslizamentosAbstract
http://dx.doi.org/10.5902/2179460X16214
In tropical countries like Brazil, one of the main trigger factors of mass movements is the volume of infiltrated water. Analysis of this relation has been increasingly explored with the aim of providing technical support for decision making to municipalities in order to avoid natural disasters. This paperwork examines this relation in a region of São Bernardo do Campo - São Paulo, through graphs of accumulated precipitation related to landslides registers, called “envoltórias”. Historical data of rainfall and landslide occurrences from 2003 to 2009 was analyzed,through collection held by the city hall at the point of Vila do Tanque and all its homogeneous region. This study results allowed to obtain “envoltórias” adjusted to the different criteria analyzed of precipitation thresholds, identified the best corresponding to the cumulative four-day (50 mm in 1 day and 150 mm in four days) criteria, more restrictive, which showed a good representation of the occurrence of landslides related to precipitation. In addition, the highlight was the difficultyof defining the rainfall limit for triggering landslides, especially in urban areas with large anthropic interference potentiating risk situations.
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