Tree-ring eccentricity in the dendrogeomorphic analysis of landslides – A comparative study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F19%3A50014780" target="_blank" >RIV/62690094:18470/19:50014780 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0341816218304892" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0341816218304892</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.catena.2018.11.002" target="_blank" >10.1016/j.catena.2018.11.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tree-ring eccentricity in the dendrogeomorphic analysis of landslides – A comparative study

Popis výsledku v původním jazyce

The chronological aspects of landslide research are of great interest regarding the hazard assessment of landslide triggers. Dendrogeomorphic methods provide a good ratio of chronology length and dating resolution. An alternative to the standard dendrogeomorphic approaches used in landslide research (based on reaction wood analysis – a reaction to stem inclination) is the analysis of tree-ring eccentricity. This study tests three frequently used dendrogeomorphic approaches based on tree-ring eccentricity and verifies the results by comparing them with the results obtained by the standard dendrogeomorphic expert approach. In total, 125 individual Fagus sylvatica L. trees growing on the block-type landslide of Lipová stráň in the foothills of the Orlické hory Mts. (central Europe) were sampled and used for the analysis. The first tested approach identifies landslide signals based on the analysis of mean eccentricity values from two moving windows. The second tested approach determines landslide signals from a series of eccentricity values based on the use of an eccentricity threshold from reference trees. The last tested approach organizes the eccentricity values into categories and identifies landslide signals based on the defined temporal patterns of the individual categories. The limitations of each approach are revealed, and recommendations for increasing the robustness of each approach are presented. Moreover, the sensitivity of F. sylvatica trees to landslide signals was tested using each approach. The obtained results suggest the need for a specific sampling design (regarding tree age) for each tree-ring eccentricity-based approach.

Název v anglickém jazyce

Tree-ring eccentricity in the dendrogeomorphic analysis of landslides – A comparative study

Popis výsledku anglicky

The chronological aspects of landslide research are of great interest regarding the hazard assessment of landslide triggers. Dendrogeomorphic methods provide a good ratio of chronology length and dating resolution. An alternative to the standard dendrogeomorphic approaches used in landslide research (based on reaction wood analysis – a reaction to stem inclination) is the analysis of tree-ring eccentricity. This study tests three frequently used dendrogeomorphic approaches based on tree-ring eccentricity and verifies the results by comparing them with the results obtained by the standard dendrogeomorphic expert approach. In total, 125 individual Fagus sylvatica L. trees growing on the block-type landslide of Lipová stráň in the foothills of the Orlické hory Mts. (central Europe) were sampled and used for the analysis. The first tested approach identifies landslide signals based on the analysis of mean eccentricity values from two moving windows. The second tested approach determines landslide signals from a series of eccentricity values based on the use of an eccentricity threshold from reference trees. The last tested approach organizes the eccentricity values into categories and identifies landslide signals based on the defined temporal patterns of the individual categories. The limitations of each approach are revealed, and recommendations for increasing the robustness of each approach are presented. Moreover, the sensitivity of F. sylvatica trees to landslide signals was tested using each approach. The obtained results suggest the need for a specific sampling design (regarding tree age) for each tree-ring eccentricity-based approach.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Catena

ISSN

0341-8162

e-ISSN

—

Svazek periodika

174

Číslo periodika v rámci svazku

MAR 2019

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

000456754600001

EID výsledku v databázi Scopus

2-s2.0-85055978534