Spatiotemporal variations of large wood and river channel morphology in a rapidly degraded reach of an intermittent river.
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F23%3AA2402M8E" target="_blank" >RIV/61988987:17310/23:A2402M8E - isvavai.cz</a>
Výsledek na webu
<a href="https://onlinelibrary.wiley.com/doi/abs/10.1002/esp.5531" target="_blank" >https://onlinelibrary.wiley.com/doi/abs/10.1002/esp.5531</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/esp.5531" target="_blank" >10.1002/esp.5531</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Spatiotemporal variations of large wood and river channel morphology in a rapidly degraded reach of an intermittent river.
Popis výsledku v původním jazyce
The links between rapid channel degradation and related large wood (LW) recruitment and storage are still not precisely understood, especially in aquatic systems with high human and natural pressures such as intermittent rivers in the peri-Mediterranean region. In this study, by using multidisciplinary research (analysis of satellite images time series, detailed field inventory, and simulated hydrological data), we focused on rapid upstream propagation of channel degradation (i.e., incision and consequent channel widening) in an intermittent Mediterranean river (Evrotas River, southern Greece) as a response to short-term intensive gravel extraction from the active channel and removal of riparian vegetation in the 2013–2016 period. Subsequently, our objective was to link this channel transformation with the spatiotemporal changes of LW storage in the active channel. We found that short-term and spatially limited human impact, coupled with high flows, allowed rapid upstream progression (~2 km) of erosion processes (approximately twofold widening of the active channel) during the relatively short 2-year period (2017–2019). This morphological response accelerated LW recruitment through bank erosion and its subsequent storage in the active channel. Incision and channel widening processes were interrupted in the 2019–2021 period due to the prevalence of relatively low, geomorphologically non-effective flows. However, the storage of LW in the channel continued to increase as a result of the higher trapping efficiency of the widened channel, a delay between tree death and its final uprooting, or by LW recruitment processes not directly related to flood events. We suggest that freshly recruited LW has the potential to accelerate the establishment of a new channel equilibrium and increase channel heterogeneity through its interaction with flows and sediments.
Název v anglickém jazyce
Spatiotemporal variations of large wood and river channel morphology in a rapidly degraded reach of an intermittent river.
Popis výsledku anglicky
The links between rapid channel degradation and related large wood (LW) recruitment and storage are still not precisely understood, especially in aquatic systems with high human and natural pressures such as intermittent rivers in the peri-Mediterranean region. In this study, by using multidisciplinary research (analysis of satellite images time series, detailed field inventory, and simulated hydrological data), we focused on rapid upstream propagation of channel degradation (i.e., incision and consequent channel widening) in an intermittent Mediterranean river (Evrotas River, southern Greece) as a response to short-term intensive gravel extraction from the active channel and removal of riparian vegetation in the 2013–2016 period. Subsequently, our objective was to link this channel transformation with the spatiotemporal changes of LW storage in the active channel. We found that short-term and spatially limited human impact, coupled with high flows, allowed rapid upstream progression (~2 km) of erosion processes (approximately twofold widening of the active channel) during the relatively short 2-year period (2017–2019). This morphological response accelerated LW recruitment through bank erosion and its subsequent storage in the active channel. Incision and channel widening processes were interrupted in the 2019–2021 period due to the prevalence of relatively low, geomorphologically non-effective flows. However, the storage of LW in the channel continued to increase as a result of the higher trapping efficiency of the widened channel, a delay between tree death and its final uprooting, or by LW recruitment processes not directly related to flood events. We suggest that freshly recruited LW has the potential to accelerate the establishment of a new channel equilibrium and increase channel heterogeneity through its interaction with flows and sediments.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10500 - Earth and related environmental sciences
Návaznosti výsledku
Projekt
—
Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
EARTH SURF PROC LAND
ISSN
0197-9337
e-ISSN
—
Svazek periodika
—
Číslo periodika v rámci svazku
5
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
14
Strana od-do
997-1010
Kód UT WoS článku
000908314400001
EID výsledku v databázi Scopus
2-s2.0-85145837661