Investigating the temporal dynamics of suspended sediment during flood events with ⁷Be and ²¹⁰Pb_xs measurements in a drained lowland catchment.

ABSTRACT: 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 (⁷Be, ²¹⁰Pb_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

SUBMITTER: Le Gall M 

PROVIDER: S-EPMC5294465 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature