Quantifying and modelling the impact of land consolidation and associated field borders on soil redistribution in agricultural landscapes (1954-2009) - GéoHydrosystèmes COntinentaux - EA6293 Accéder directement au contenu
Communication Dans Un Congrès Année : 2012

Quantifying and modelling the impact of land consolidation and associated field borders on soil redistribution in agricultural landscapes (1954-2009)

Résumé

Field borders induce landscape fragmentation and have an important role on the spatial variability of soil erosion and deposition processes. Vegetated borders affect the hydrological and sedimentological connectivity across hillslopes, and all types of field borders act as lines of zero-flux against tillage translocation. This leads to the development of linear anthropogenic landforms (e.g., ridges-and-furrows, headlands, and lynchets) which will keep evolving after field border removal. This is particularly the case in western Europe where agricultural policy and mechanisation led to the massive removal of field borders through numerous land consolidation schemes (1960-1990). The aim of this study is to assess the effect of field borders and their removal on soil redistribution in a cultivated hillslope of the SW Parisian Basin. Recent patterns of soil redistribution are derived from 137Cs inventories and analysed with respect to the different topographical settings, especially linear anthropogenic landforms. Then, erosion and deposition rates are calculated using a conversion model that integrates the dominant processes of soil redistribution over the last fifty years. Results show that areas submitted to intensive erosion or deposition are mainly concentrated on linear landforms induced by field borders. The use of the conversion model highlights that soil redistribution is strongly dominated by tillage-induced processes. Land consolidation enhanced soil redistribution through the conversion of depositional areas into sediment delivering areas. Erosion and deposition processes induced by field borders and their removal appear to be very important when compared to mean soil redistribution in the entire study area.
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Dates et versions

hal-02320703 , version 1 (19-10-2019)

Identifiants

  • HAL Id : hal-02320703 , version 1

Citer

Caroline Chartin, O. Evrard, Sébastien Salvador-Blanes, Florent Hinschberger, Jean-Jacques Macaire, et al.. Quantifying and modelling the impact of land consolidation and associated field borders on soil redistribution in agricultural landscapes (1954-2009). Eurosoil 2012, 4th international Congress of the European Confederation of Soil Science Societies (ECSSS), Jul 2012, Bari, Italy. ⟨hal-02320703⟩
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