Articles | Volume 18, issue 9
Nat. Hazards Earth Syst. Sci., 18, 2455–2469, 2018
https://doi.org/10.5194/nhess-18-2455-2018
Nat. Hazards Earth Syst. Sci., 18, 2455–2469, 2018
https://doi.org/10.5194/nhess-18-2455-2018

Research article 14 Sep 2018

Research article | 14 Sep 2018

Effective surveyed area and its role in statistical landslide susceptibility assessments

Txomin Bornaetxea et al.

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Cited articles

Alvioli, M., Marchesini, I., Reichenbach, P., Rossi, M., Ardizzone, F., Fiorucci, F., and Guzzetti, F.: Automatic delineation of geomorphological slope units with r.slopeunits v1.0 and their optimization for landslide susceptibility modeling, Geosci. Model Dev., 9, 3975–3991, https://doi.org/10.5194/gmd-9-3975-2016, 2016.
Alvioli, M., Melillo, M., Guzzetti, F., Rossi, M., Palazzi, E., von Hardenberg, J., Brunetti, M. T., and Peruccacci, S.: Implications of climate change on landslide hazard in Central Italy, Sci. Total Environ., 630, 1528–1543, https://doi.org/10.1016/j.scitotenv.2018.02.315, 2018a.
Alvioli, M., Mondini, A. C., Fiorucci, F., Cardinali, M., and Marchesini, I.: Topography-driven satellite imagery analysis for landslide mapping, Geomat. Nat. Haz. Risk, 9, 544–567, https://doi.org/10.1080/19475705.2018.1458050, 2018b.
Amorim, S. F.: Estudio comparativo de métodos para la evaluación de la susceptibilidad del terreno a la formacion de deslizamientos superficiales: Aplicación al Pirineo Oriental, PhD thesis, Universidad Politécnica de Catalunya, available at: http://futur.upc.edu/10953986 (last access: 15 July 2015), 2012.
Ayalew, L. and Yamagishi, H.: The application of GIS-based logistic regression for landslide susceptibility mapping in the Kakuda-Yahiko Mountains, Central Japan, Geomorphology, 65, 15–31, https://doi.org/10.1016/j.geomorph.2004.06.010, 2005.
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Short summary
While producing a landslide susceptibility map using a fieldwork-based landslide inventory and a logistic regression model, two crucial questions came to our minds. (i) Shall we consider unsurveyed regions of the study area, for which landslide absence is typically assumed? (ii) Which reference mapping unit should be used in our model? So we compared four maps and found that rejecting unsurveyed regions together with slope units as reference mapping unit should be the best option.
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