Geotope of boulder accumulations: Possible source of noise in the dendrogeomorphic dating of landslides

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F22%3AN2302DFE" target="_blank" >RIV/61988987:17310/22:N2302DFE - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S034181622200128X" target="_blank" >https://www.sciencedirect.com/science/article/pii/S034181622200128X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.catena.2022.106142" target="_blank" >10.1016/j.catena.2022.106142</a>

Result language

angličtina

Original language name

Geotope of boulder accumulations: Possible source of noise in the dendrogeomorphic dating of landslides

Original language description

Dendrogeomorphic dating is an effective tool for the assessment of past landslide activity. However, some complex landslide areas include zones of accumulated boulders that can represent geotopes with deteriorated conditions for the stable anchoring of tree roots. Under such conditions, wind gusts can easily cause stem tilting and subsequently be a source of growth disturbances and false landslide events. This study evaluated this possible source of uncertainty in tree rings based on the dating of selected flow-like shaped accumulations of boulders in the Outer Western Carpathians. The data from 94 Norway spruce (Picea abies (L.) Karst.) individuals provided evidence of 154 growth disturbances that were fully comparable with the frequency of active landslides. However, geophysical geoelectrical sounding in combination with field mapping suggests that the studied accumulation is stable. Growth disturbances enabled the reconstruction of nine past events, reaching the minimal threshold of the percentage index. Analysis of triggers detected the occurrence of above-average wind gust speeds in event years compared to other years. Moreover, the dated growth disturbances were not present in the reference trees, probably due to the more stable positions of these trees and thus their better resistance to wind forces. Moreover, the duration of growth disturbances in event years was significantly longer than that of disturbances in other years.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10508 - Physical geography

Project

<a href="/en/project/GA19-01866S" target="_blank" >GA19-01866S: Ancient landslides: really inactive?</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

CATENA

ISSN

0341-8162

e-ISSN

—

Volume of the periodical

—

Issue of the periodical within the volume

červen

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

—

UT code for WoS article

000793184000003

EID of the result in the Scopus database

—