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- W4283166013 abstract "<p>The landscape structure elements in agricultural catchments (ditches, hedges, pounds etc.) are known to have a major role in hydro-sedimentary transfers. They determine sediments availability, sediment pathways, water and sediments (de)coupling and connectivity patterns from source to sinks. However, linear drainage infrastructures remain often poorly represented in hydro-sedimentary modelling despite their major influence on flows redirection and concentration. Therefore, understanding the link between the catchment landscape structure and the transfer processes at its outlet is still a major challenge. Graph theory has been proved to be a significant tool to investigate sediment connectivity among agricultural catchments as it allows an explicit representation of linear and punctual elements of the landscape.</p><p>Based on a detailed inventory of linear landscape elements and a continuous monitoring of sediment fluxes, we built a new graph theory framework to comprehend sediments transfers in a dense agricultural drainage network in the Beaujolais vineyard (France). It integrates all types of linear infrastructures that might canalize water and sediment fluxes (tracks, ditches and soil bunds) and sediment traps used by winegrowers. From the intersection of the drainage network and a topographic graph, we went for spatial analysis and applied the index of connectivity (IC), to extract effects of (dis)connectivity and to compare several spatial configurations (i.e. topographic graph excluding linear infrastructures). To small catchments (8km&#178;) of the Beaujolais vineyard are compared the effect of different landscape structures on sediment connectivity. Drainage network outlets were extracted to distinguish direct connections to the river in comparison to sediment sinks. The network structure emphasizes a reduction of sediment connectivity on the upper slope unlike on the lower slope where it is increased. Describing sediment structural connectivity through landscape structure analysis allows to identify the drainage infrastructures efficiency and might be of interest in a management perspective.</p>" @default.
- W4283166013 created "2022-06-21" @default.
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- W4283166013 date "2022-06-20" @default.
- W4283166013 modified "2023-09-30" @default.
- W4283166013 title "Graph theory structure to describe sediment connectivity: application in the Beaujolais vineyard landscapes" @default.
- W4283166013 doi "https://doi.org/10.5194/icg2022-564" @default.
- W4283166013 hasPublicationYear "2022" @default.
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