Contrasting landslide activity on slopes with different structural geology: evidence from dendrogeomorphic analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F23%3A50020636" target="_blank" >RIV/62690094:18470/23:50020636 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s10346-023-02067-x" target="_blank" >https://link.springer.com/article/10.1007/s10346-023-02067-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10346-023-02067-x" target="_blank" >10.1007/s10346-023-02067-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Contrasting landslide activity on slopes with different structural geology: evidence from dendrogeomorphic analysis

Popis výsledku v původním jazyce

Slope movements are one of the most widespread geomorphic processes and can cause material damage due to their rapid and unpredictable action. The structural-geological conditions of the slope can play an important role in the resulting activity of landslide movements, and their type and mechanism. The environments in which slopes with different structural-geological structures regularly occur are cuesta. In order to define landslide activity on slopes with different structures, it is necessary to know their detailed historical behaviour. In this study, dendrogeomorphic methods were used to spatio-temporally reconstruct the activity of two landslides on slopes with contrasting structural-geological structure (bedding planes slope and escarpment slope) in the Hřebečský hřbet (Czech Republic) cuesta area. A total of 174 individuals of common spruce (Picea abies (L.) Karst.) were sampled using 348 increment cores. The internal structure and depth of the landslides on both slopes were analyzed using ERT (electrical resistivity tomography) geophysical measurements. The escarpment slope was affected by a rotational landslide that transitioned to a shallow plastic front at the base. Activity on this front was very high, which can be attributed to its heavy waterlogging, as confirmed by ERT measurements. Moreover, the chronological occurrence of landslide activity on this slope corresponded very well with the occurrence of above-average 3-day rainfall. In contrast, the slope on bedding planes was affected by rotational-translational landslide, which activity was significantly lower (four dated events in the last 80 years). Moreover, these events did not correspond to the occurrence of any pattern of above-average rainfall events. Thus, in this case, dendrogeomorphological analysis revealed distinct landslide behaviour on slopes with contrasting structural-geological conditions.

Název v anglickém jazyce

Contrasting landslide activity on slopes with different structural geology: evidence from dendrogeomorphic analysis

Popis výsledku anglicky

Slope movements are one of the most widespread geomorphic processes and can cause material damage due to their rapid and unpredictable action. The structural-geological conditions of the slope can play an important role in the resulting activity of landslide movements, and their type and mechanism. The environments in which slopes with different structural-geological structures regularly occur are cuesta. In order to define landslide activity on slopes with different structures, it is necessary to know their detailed historical behaviour. In this study, dendrogeomorphic methods were used to spatio-temporally reconstruct the activity of two landslides on slopes with contrasting structural-geological structure (bedding planes slope and escarpment slope) in the Hřebečský hřbet (Czech Republic) cuesta area. A total of 174 individuals of common spruce (Picea abies (L.) Karst.) were sampled using 348 increment cores. The internal structure and depth of the landslides on both slopes were analyzed using ERT (electrical resistivity tomography) geophysical measurements. The escarpment slope was affected by a rotational landslide that transitioned to a shallow plastic front at the base. Activity on this front was very high, which can be attributed to its heavy waterlogging, as confirmed by ERT measurements. Moreover, the chronological occurrence of landslide activity on this slope corresponded very well with the occurrence of above-average 3-day rainfall. In contrast, the slope on bedding planes was affected by rotational-translational landslide, which activity was significantly lower (four dated events in the last 80 years). Moreover, these events did not correspond to the occurrence of any pattern of above-average rainfall events. Thus, in this case, dendrogeomorphological analysis revealed distinct landslide behaviour on slopes with contrasting structural-geological conditions.

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

2023

Kód důvěrnosti údajů

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

Název periodika

Landslides

ISSN

1612-510X

e-ISSN

1612-5118

Svazek periodika

20

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

1893-1903

Kód UT WoS článku

000983936800001

EID výsledku v databázi Scopus

2-s2.0-85158103083