Influences of Catchment and River Channel Characteristics on the Magnitude and Dynamics of Storage and Re-Suspension of Fine Sediments in River Beds

Abstract

Fine particles or sediments are one of the important variables that should be considered for the proper management of water quality and aquatic ecosystems. In the present study, the effect of catchment characteristics on the performance of an already developed model for the estimation of fine sediments dynamics between the water column and sediment bed was tested, using 13 catchments distributed worldwide. The model was calibrated to determine two optimal model parameters. The first is the filtration parameter, which represents the filtration of fine sediments through pores of the stream bed during the recession period of a flood event. The second parameter is the bed erosion parameter that represents the active layer, directly related to the re-suspension of fine sediments during a flood event. A dependency of the filtration parameter with the catchment area was observed in catchments smaller than ~100 km2, whereas no particular relationship was observed for larger catchments (>100 km2). In contrast, the bed erosion parameter does not show a noticeable dependency with the area or other environmental characteristics. The model estimated the mass of fine sediments released from the sediment bed to the water column during flood events in the 13 catchments within ~23% bias.

A critical zone observatory dedicated to suspended sediment transport: The meso‐scale Galabre catchment (southern French Alps)

“…It was already used in studies on sediment budgets at larger scales in the Bléone catchment in order to assess the spatial variations of erosion intensity (Evrard et al, 2011) or the drivers of the temporal variability of SS fluxes (Navratil et al, 2012). The data can also be used to test conceptual or physically‐based models investigating assumptions such as the respective contribution of badlands and the riverbed to SSY (Misset et al, 2019; Park et al, 2019) or the role of the catchment configuration on SS connectivity (Uber et al, 2020).…”

The Variation of Water Quality in Three Land Use Types in U Minh Ha National Park, Ca Mau Province, Vietnam Using Multivariate Statistical Approaches

“…The increase in BOD concentrations during the rainy season was likely due to the resuspension of organic matters from sediments under the impact of runoff and turbulence in rainwater [35]. In addition, high temperature, humidity, and inundation could facilitate the decomposition of organic matters in the AH and PMC areas [36].…”

Interactions entre flux en suspension et lit d’une riviere alluviale alpine – cas de La Séveraisse

“…Des études récentes sur le terrain (Navratil et al, 2010 ;Park and Hunt, 2017) et en laboratoire (Hill et al, 2017 ;Mooneyham and Strom, 2018) suggèrent que des processus d'infiltration et de resuspension ont lieu dans le lit de ces cours d'eau alpins et que ces processus peuvent être significatifs à l'échelle du bassin versant. Bien que mal connus, ces échanges avec le lit sont souvent représentés conceptuellement par un réservoir de stockage/destockage (Mano, 2008 ;Park et al, 2019 ;Park and Hunt, 2018). La prise en compte des échanges avec le lit permet d'améliorer significativement la prédiction des modèles conceptuels calibrés sur des mesures.…”