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Dendrochronological dating as the basis for developing a landslide hazard map – An example from the Western Carpathians, Poland

Katarzyna Łuszczyńska

Katarzyna Łuszczyńska

Faculty of Earth Sciences, University of Silesia in KatowiceSosnowiec, Poland
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Łuszczyńska, Katarzyna
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Małgorzata Wistuba

Małgorzata Wistuba

Faculty of Earth Sciences, University of Silesia in KatowiceSosnowiec, Poland
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Wistuba, Małgorzata
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Ireneusz Malik

Ireneusz Malik

Faculty of Earth Sciences, University of Silesia in KatowiceSosnowiec, Poland
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Malik, Ireneusz
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Marek Krąpiec

Marek Krąpiec

Faculty of Geology, Geophysics and Environmental Protection, AGH – University of Science and TechnologyCracow, Poland
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Krąpiec, Marek
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Bartłomiej Szypuła

Bartłomiej Szypuła

Faculty of Earth Sciences, University of Silesia in KatowiceSosnowiec, Poland
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Szypuła, Bartłomiej
  
21 ago 2018
Dendrochronological dating as the basis for developing a landslide hazard map – An example from the Western Carpathians, Poland's Cover Image
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Categoria dell'articolo: Regular Articles
Pubblicato online: 21 ago 2018
Pagine: 173 - 184
Ricevuto: 07 mag 2018
Accettato: 04 giu 2018
DOI: https://doi.org/10.1515/geochr-2015-0093
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© 2018 K. Łuszczyńska. published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

The location of the study area in Central Europe, Western Carpathians (A) and the location of sampling sites for a dendrochronological study in the massif of Sucha Mt, in the Beskid Żywiecki Mts (B).
The location of the study area in Central Europe, Western Carpathians (A) and the location of sampling sites for a dendrochronological study in the massif of Sucha Mt, in the Beskid Żywiecki Mts (B).

Fig. 2

An example of dating landslide events from ring widths into (A) eccentricity, (B) eccentricity index [%] and (C) its yearly variation [%]:U — tree-ring widths in the upslope part of the stem [mm];D — tree-ring widths in the downslope part of the stem [mm];E — the eccentricity of the tree-ring [mm];Ei — the eccentricity index of the tree-ring [%];vEi — the yearly variation in the eccentricity index [%];x — year (annual tree ring).
An example of dating landslide events from ring widths into (A) eccentricity, (B) eccentricity index [%] and (C) its yearly variation [%]:U — tree-ring widths in the upslope part of the stem [mm];D — tree-ring widths in the downslope part of the stem [mm];E — the eccentricity of the tree-ring [mm];Ei — the eccentricity index of the tree-ring [%];vEi — the yearly variation in the eccentricity index [%];x — year (annual tree ring).

Fig. 3

The results of interpolation for all points (A, C, E), and without 5 control points (B, D, F). Interpolation methods: the Radial-Basis Function (A, B), Spline (C, D), and Topo to Raster (E, F).
The results of interpolation for all points (A, C, E), and without 5 control points (B, D, F). Interpolation methods: the Radial-Basis Function (A, B), Spline (C, D), and Topo to Raster (E, F).

Fig. 4

The barriers applied in the process of dendrochronological-data interpolation in the massif of Sucha Mt, Western Carpathians, Poland: (A) watercourses, (B) the most-important ridgelines.
The barriers applied in the process of dendrochronological-data interpolation in the massif of Sucha Mt, Western Carpathians, Poland: (A) watercourses, (B) the most-important ridgelines.

Fig. 5

Average frequency of landslide events calculated for each sampling site in the massif of Sucha Mt, Western Carpathians, Poland
Average frequency of landslide events calculated for each sampling site in the massif of Sucha Mt, Western Carpathians, Poland

Fig. 6

A landslide activity map developed on the basis of the selected interpolation method – Spline with barriers (A) and the landslide hazard map for the massif of Sucha Mt, Western Carpathians, Poland (B). Maps of the distribution of landslides were created on the basis of the results obtained from the tree-ring eccentricity analysis.
A landslide activity map developed on the basis of the selected interpolation method – Spline with barriers (A) and the landslide hazard map for the massif of Sucha Mt, Western Carpathians, Poland (B). Maps of the distribution of landslides were created on the basis of the results obtained from the tree-ring eccentricity analysis.

The calculated errors of the interpolation methods_ A Root Mean Square Error (RMSE) expresses the differences between original (real) values (2nd column) and the interpolated values (3rd, 5th and 7th columns)_

PointsRadial Basis FunctionSplineTopo to Raster
No.Real ValueValueDifferenceValueDifferenceValueDifference
10.651.37+0.721.06+0.411.36+0.71
21.520.95–0.571.12–0.400.91–0.61
31.211.04–0.170.98–0.231.07–0.14
41.381.48+0.102.05+0.671.37–0.01
51.210.50–0.710.30–0.910.63–0.58
MEAN1.191.07–0.131.10–0.091.07–0.13
RMSE––0.53–0.57–0.49
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