Investigating the temporal dynamics of suspended sediment during flood events with Be-7 and Pb-210(xs) measurements in a drained lowland catchment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90072%2F17%3A00344169" target="_blank" >RIV/68407700:90072/17:00344169 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1038/srep42099" target="_blank" >https://doi.org/10.1038/srep42099</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/srep42099" target="_blank" >10.1038/srep42099</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigating the temporal dynamics of suspended sediment during flood events with Be-7 and Pb-210(xs) measurements in a drained lowland catchment

Popis výsledku v původním jazyce

Soil erosion is recognized as one of the main processes of land degradation in agricultural areas. High suspended sediment loads, often generated from eroding agricultural landscapes, are known to degrade downstream environments. Accordingly, there is a need to understand soil erosion dynamics during flood events. Suspended sediment was therefore sampled in the river network and at tile drain outlets during five flood events in a lowland drained catchment in France. Source and sediment fallout radionuclide concentrations (Be-7, Pb-210(xs)) were measured to quantify both the fraction of recently eroded particles transported during flood events and their residence time. Results indicate that the mean fraction of recently eroded sediment, estimated for the entire Louroux catchment, increased from 45 +/- 20% to 80 +/- 20% between December 2013 and February 2014, and from 65 +/- 20% to 80 +/- 20% in January 2016. These results demonstrate an initial flush of sediment previously accumulated in the river channel before the increasing supply of sediment recently eroded from the hillslopes during subsequent events. This research highlights the utility of coupling continuous river monitoring and fallout radionuclide measurements to increase our understanding of sediment dynamics and improve the management of soil and water resources in agricultural catchments.

Název v anglickém jazyce

Investigating the temporal dynamics of suspended sediment during flood events with Be-7 and Pb-210(xs) measurements in a drained lowland catchment

Popis výsledku anglicky

Soil erosion is recognized as one of the main processes of land degradation in agricultural areas. High suspended sediment loads, often generated from eroding agricultural landscapes, are known to degrade downstream environments. Accordingly, there is a need to understand soil erosion dynamics during flood events. Suspended sediment was therefore sampled in the river network and at tile drain outlets during five flood events in a lowland drained catchment in France. Source and sediment fallout radionuclide concentrations (Be-7, Pb-210(xs)) were measured to quantify both the fraction of recently eroded particles transported during flood events and their residence time. Results indicate that the mean fraction of recently eroded sediment, estimated for the entire Louroux catchment, increased from 45 +/- 20% to 80 +/- 20% between December 2013 and February 2014, and from 65 +/- 20% to 80 +/- 20% in January 2016. These results demonstrate an initial flush of sediment previously accumulated in the river channel before the increasing supply of sediment recently eroded from the hillslopes during subsequent events. This research highlights the utility of coupling continuous river monitoring and fallout radionuclide measurements to increase our understanding of sediment dynamics and improve the management of soil and water resources in agricultural catchments.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10510 - Climatic research

Projekt

—

Návaznosti

—

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Scientific Reports

ISSN

2045-2322

e-ISSN

2045-2322

Svazek periodika

7

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

000393462300001

EID výsledku v databázi Scopus

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