Interannual spatial distribution and dynamics of large wood in a meandering river

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F25%3AA2603B46" target="_blank" >RIV/61988987:17310/25:A2603B46 - isvavai.cz</a>

Výsledek na webu

<a href="https://linkinghub.elsevier.com/retrieve/pii/S0022169425006407" target="_blank" >https://linkinghub.elsevier.com/retrieve/pii/S0022169425006407</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jhydrol.2025.133302" target="_blank" >10.1016/j.jhydrol.2025.133302</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interannual spatial distribution and dynamics of large wood in a meandering river

Popis výsledku v původním jazyce

Meandering rivers are widespread fluvial systems, yet surprisingly little is known about the quantity and spatiotemporal patterns of large wood (LW; pieces of dead wood >= 1 m long with >= 0.1 m in diameter) storage in these environments. This study aims to evaluate the interannual storage and dynamics of LW from 2016 to 2024, focusing on 13 meander bends within a 4 km actively meandering reach of the Odra River in Czechia. Data were collected using a multifaceted approach, including field inventories, drone imagery, and time-lapse cameras. Significant variations in LW counts (179-287) and volumes (7.91-9.82 m3/ha) were observed over the 8-year period, which were not directly related to flow variations alone, indicating that river morphodynamics and other disturbances influencing LW recruitment must also be considered. The presence of woody vegetation at the outer meander bank was a significant predictor of average LW volume at the bend scale. Despite the occurrence of a flow close to the 1-year recurrence interval, many LW pieces three to four times shorter than the channel width remained stable, resulting in a 50 % mobility rate during a closely monitored year. This flow, however, transported a significantly larger quantity of LW compared to the total inventoried LW in the entire study reach, suggesting intensive LW recruitment even during frequent low-magnitude events. LW length was an important predictor of mobility, while factors such as incorporation into jams, complex shapes with preserved branches (indicating freshly recruited wood), and initial channel position (with jammed LW in the middle of the channel being more frequently mobilized) also played roles. Understanding the interaction between vegetation, channel morphology, and LW dynamics can inform strategies to enhance habitat complexity and improve floodplain connectivity, while also providing valuable guidelines for assessing potential LW mobility during floods.

Název v anglickém jazyce

Interannual spatial distribution and dynamics of large wood in a meandering river

Popis výsledku anglicky

Meandering rivers are widespread fluvial systems, yet surprisingly little is known about the quantity and spatiotemporal patterns of large wood (LW; pieces of dead wood >= 1 m long with >= 0.1 m in diameter) storage in these environments. This study aims to evaluate the interannual storage and dynamics of LW from 2016 to 2024, focusing on 13 meander bends within a 4 km actively meandering reach of the Odra River in Czechia. Data were collected using a multifaceted approach, including field inventories, drone imagery, and time-lapse cameras. Significant variations in LW counts (179-287) and volumes (7.91-9.82 m3/ha) were observed over the 8-year period, which were not directly related to flow variations alone, indicating that river morphodynamics and other disturbances influencing LW recruitment must also be considered. The presence of woody vegetation at the outer meander bank was a significant predictor of average LW volume at the bend scale. Despite the occurrence of a flow close to the 1-year recurrence interval, many LW pieces three to four times shorter than the channel width remained stable, resulting in a 50 % mobility rate during a closely monitored year. This flow, however, transported a significantly larger quantity of LW compared to the total inventoried LW in the entire study reach, suggesting intensive LW recruitment even during frequent low-magnitude events. LW length was an important predictor of mobility, while factors such as incorporation into jams, complex shapes with preserved branches (indicating freshly recruited wood), and initial channel position (with jammed LW in the middle of the channel being more frequently mobilized) also played roles. Understanding the interaction between vegetation, channel morphology, and LW dynamics can inform strategies to enhance habitat complexity and improve floodplain connectivity, while also providing valuable guidelines for assessing potential LW mobility during floods.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

<a href="/cs/project/GA22-17474S" target="_blank" >GA22-17474S: Biogeomorfologické interakce v meandrujících řekách napříč rozdílnými časoprostorovými měřítky</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Hydrology

ISSN

0022-1694

e-ISSN

1879-2707

Svazek periodika

—

Číslo periodika v rámci svazku

OCT

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

—

Kód UT WoS článku

001471143200001

EID výsledku v databázi Scopus

2-s2.0-105002336738