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Communication Dans Un Congrès Année : 2012

Susceptibility of small upland catchments to debris-flow

Résumé

Over the last thirty years, morphometric indicators have been widely used to identify catchments prone to debris-flow. The most commonly used parameters are the Melton ruggedness index and the slope of the alluvial fan. We therefore compiled these two morphometric parameters and the observed response (fluvial vs. debris-flow catchments) for 620 alpine catchments. We used this new database (compiled from the literature) to build a broader-scale statistical model for regional scale debris-flow prediction. Two multivariate statistical models were tested: linear discriminant analysis and logistic regression. After comparing the results between these two models we tested the influence of a balanced / unbalanced response variable. The logistic regression showed better results (median specificity around 0.9 and median sensitivity of 0.88) and has been chosen as the final model of discrimination.
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Dates et versions

hal-02599486 , version 1 (16-05-2020)

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M. Bertrand, F. Liébault, H. Piegay. Susceptibility of small upland catchments to debris-flow. 12th Congress INTERPRAEVENT 2012, Apr 2012, Grenoble, France. pp.47-58. ⟨hal-02599486⟩
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