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A new data assimilation procedure to develop a debris flow run-out model

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Abstract

Parameter calibration is one of the most problematic phases of numerical modeling since the choice of parameters affects the model’s reliability as far as the physical problems being studied are concerned. In some cases, laboratory tests or physical models evaluating model parameters cannot be completed and other strategies must be adopted; numerical models reproducing debris flow propagation are one of these. Since scale problems affect the reproduction of real debris flows in the laboratory or specific tests used to determine rheological parameters, calibration is usually carried out by comparing in a subjective way only a few parameters, such as the heights of soil deposits calculated for some sections of the debris flows or the distance traveled by the debris flows using the values detected in situ after an event has occurred. Since no automatic or objective procedure has as yet been produced, this paper presents a numerical procedure based on the application of a statistical algorithm, which makes it possible to define, without ambiguities, the best parameter set. The procedure has been applied to a study case for which digital elevation models of both before and after an important event exist, implicating that a good database for applying the method was available. Its application has uncovered insights to better understand debris flows and related phenomena.

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Authors and Affiliations

  1. Department ICEA, University of Padova, via Ognissanti 39, 35129, Padova, Italy

    L. Brezzi, F. Gabrieli & S. Cola

  2. Research Institute for Hydrological and Geological Hazard Prevention, CNR-IRPI—National Research Council of Italy, C.so Stati Uniti 4, 35127, Padova, Italy

    G. Bossi & G. Marcato

  3. Universidad Politécnica de Madrid, Madrid, Spain

    M. Pastor

Authors
  1. L. Brezzi
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  2. G. Bossi
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  3. F. Gabrieli
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  4. G. Marcato
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  5. M. Pastor
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  6. S. Cola
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Correspondence to L. Brezzi.

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Brezzi, L., Bossi, G., Gabrieli, F. et al. A new data assimilation procedure to develop a debris flow run-out model. Landslides 13, 1083–1096 (2016). https://doi.org/10.1007/s10346-015-0625-y

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  • DOI: https://doi.org/10.1007/s10346-015-0625-y

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