<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Most landslide hazard maps are developed on the basis of an area’s susceptibility to a landslide occurrence, but dendrochronological techniques allows one to develop maps based on past landslide activity. The aim of the study was to use dendrochronological techniques to develop a landslide hazard map for a large area, covering 3.75 km<sup>2</sup>. We collected cores from 131 trees growing on 46 sampling sites, measured tree-ring width, and dated growth eccentricity events (which occur when tree rings of different widths are formed on opposite sides of a trunk), recording the landslide events which had occurred over the previous several dozen years. Then, the number of landslide events per decade was calculated at every sampling site. We interpolated the values obtained, added layers with houses and roads, and developed a landslide hazard map. The map highlights areas which are potentially safe for existing buildings, roads and future development. The main advantage of a landslide hazard map developed on the basis of dendrochronological data is the possibility of acquiring long series of data on landslide activity over large areas at a relatively low cost. The main disadvantage is that the results obtained relate to the measurement of anatomical changes and the macroscopic characteristics of the ring structure occurring in the wood of tilted trees, and these factors merely provide indirect information about the time of the landslide event occurrence.</p></abstract>

Most landslide hazard maps are developed on the basis of an area’s susceptibility to a landslide occurrence, but dendrochronological techniques allows one to develop maps based on past landslide activity. The aim of the study was to use dendrochronological techniques to develop a landslide hazard map for a large area, covering 3.75 km2. We collected cores from 131 trees growing on 46 sampling sites, measured tree-ring width, and dated growth eccentricity events (which occur when tree rings of different widths are formed on opposite sides of a trunk), recording the landslide events which had occurred over the previous several dozen years. Then, the number of landslide events per decade was calculated at every sampling site. We interpolated the values obtained, added layers with houses and roads, and developed a landslide hazard map. The map highlights areas which are potentially safe for existing buildings, roads and future development. The main advantage of a landslide hazard map developed on the basis of dendrochronological data is the possibility of acquiring long series of data on landslide activity over large areas at a relatively low cost. The main disadvantage is that the results obtained relate to the measurement of anatomical changes and the macroscopic characteristics of the ring structure occurring in the wood of tilted trees, and these factors merely provide indirect information about the time of the landslide event occurrence.

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

AGH – University of Science and Technology

Geochronometria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Most landslide hazard maps are developed on the basis of an area’s susceptibility to a landslide occurrence, but dendrochronological techniques allows one to...

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

Article Category: Regular Articles

Published Online: Aug 21, 2018

Page range: 173 - 184

Received: May 07, 2018

Accepted: Jun 04, 2018

DOI: https://doi.org/10.1515/geochr-2015-0093

Keywords
landslide activity, landslide hazard map, tree-ring data, Western Carpathians

© 2018 K. Łuszczyńska. published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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

Article Category: Regular Articles

Published Online: Aug 21, 2018

Page range: 173 - 184

Received: May 07, 2018

Accepted: Jun 04, 2018

DOI: https://doi.org/10.1515/geochr-2015-0093

Keywordslandslide activity, landslide hazard map, tree-ring data, Western Carpathians

© 2018 K. Łuszczyńska. published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
landslide activity, landslide hazard map, tree-ring data, Western Carpathians