title;"How do modeling choices impact the representation of structural connectivity and the dynamics of suspended sediment fluxes in distributed soil erosion models?";;;;
contributorName:Sponsor;"Infrastructure de Recherche Observation de la Zone Critique, Applications, Recherche (OZCAR) / Ministère de l'Éducation nationale, de l'Enseignement supérieur et de la Recherche";;;;
contributorName:Sponsor;CIMENT/GRICAD;;;;
contributorName:ResearchGroup;"Institut des Géosciences de l'Environnement (France) - IGE";;;;
contributorName:ResearchGroup;"Environmental and Water Engineering Group, Department of Civil Engineering, Universidade da Coruña, A Coruña, Spain";;;;
date:Collected;2020-07-21;;;;
language;en;;;;
relatedIdentifier:Cites:URL;;;;;
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resourceType:Dataset;TODO;;;;
format;TODO;;;;
rights;"License: CC BY 4.0";rightsURI;https://creativecommons.org/licenses/by/4.0;;
rights;"Data access and use are ruled by the CC-BY 4.0 license.";;;;
description:Abstract;"Soil erosion and suspended sediment transport understanding is an important issue in terms of soil and water resources management in the critical zone. In mesoscale watersheds (>10km²) the spatial distribution of potential sediment sources within the catchment associated to the rainfall dynamics are considered as the main factors of the observed suspended sediment flux variability within and between runoff events. Given the high spatial heterogeneity that can exist for such scales of interest, distributed physically based models of soil erosion and sediment transport are powerful tools to distinguish the specific effect of structural and functional connectivity on suspended sediment flux dynamics. As the spatial discretization of a model and its parameterization can crucially influence how structural connectivity of the catchment is represented in the model, this study analyzed the impact of modeling choices in terms of contributing drainage area (CDA) threshold to define the river network and of Manning's roughness parameter (n) on the sediment flux variability at the outlet of two geomorphological distinct watersheds. While the modelled liquid and solid discharges were found to be sensitive to these choices, the patterns of the modeled source contributions remained relatively similar when the CDA threshold was restricted to the range of 15 to 50 ha, n on the hillslopes to the range 0.4-0.8 and to 0.025-0.075 in the river. The comparison of both catchments showed that the actual location of sediment sources was more important than the choices made during discretization and parameterization of the model. Among the various structural connectivity indicators used to describe the geological sources, the mean distance to the stream was the most relevant proxy of the temporal characteristics of the modelled sedigraphs.";;;;
