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Relationships between rain and displacements of an active earthflow: a data-driven approach by EPRMOGA

Author

Listed:
  • R. Vassallo

    (University of Basilicata)

  • A. Doglioni

    (Technical University of Bari)

  • G. M. Grimaldi

    (University of Basilicata)

  • C. Di Maio

    (University of Basilicata)

  • V. Simeone

    (Technical University of Bari)

Abstract

Inclinometer and piezometer measurements have been carried out since 2005 in a slow active earthflow in a clay shale formation of the Italian Southern Apennines. Previous studies outlined the main geometrical and kinematic features of the landslide and the pore pressure response to rainfall. Displacement rates seem to depend on the hydrological conditions as suggested by their seasonal variations. The availability of long time series of data, in some periods recorded in continuum, allows the use of a data mining approach to evaluate the relations among displacement rates in different points of the landslide, and between displacement rates and rainfall. To define such relations, the evolutionary modelling technique EPRMOGA, based on a genetic algorithm, has been used in this paper. The results give a deeper insight into the landslide behaviour on the one hand and, on the other hand, show the reliability of the technique, also in building up management scenarios. In particular, the results show that the landslide displacement rates in different points of the slip surface, although characterized by different values, are linearly dependent and thus have the same time trend, supporting the hypothesis of a constant soil discharge mechanism of movement. Piezometric data in single points cannot be used, in the considered case, to forecast displacements. The obtained relations allow to quantify the displacement rate variations due to contemporary rainfall. The influence of past rainfall is shown to decrease exponentially with temporal distance. Furthermore, the EPRMOGA simulations seem to confirm that there are no other dominant causes, besides rainfall, responsible of displacement rate variations in time.

Suggested Citation

  • R. Vassallo & A. Doglioni & G. M. Grimaldi & C. Di Maio & V. Simeone, 2016. "Relationships between rain and displacements of an active earthflow: a data-driven approach by EPRMOGA," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 81(3), pages 1467-1482, April.
    • Handle: RePEc:spr:nathaz:v:81:y:2016:i:3:d:10.1007_s11069-015-2140-9
    DOI: 10.1007/s11069-015-2140-9
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    References listed on IDEAS

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    1. Stefano Calcaterra & Claudio Cesi & Caterina Di Maio & Piera Gambino & Katia Merli & Margherita Vallario & Roberto Vassallo, 2012. "Surface displacements of two landslides evaluated by GPS and inclinometer systems: a case study in Southern Apennines, Italy," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 61(1), pages 257-266, March.
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    Cited by:

    1. Mingzhe Zhang & Bao Zhou & Qiangong Cheng & Lingkai Shen & Aiguo Xing & Yu Zhuang, 2021. "Investigation of the triggering mechanism and runout characteristics of an earthflow in Zhimei village, Chengduo, Qinghai, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 109(1), pages 903-929, October.

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