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Structure du paysage et fonctionnement hydrologique : application aux réseaux de fossés en zone viticole méditerranéenne.

Abstract : The impact of ditch networks on runoff, soil erosion and pollutant transfer is well known at local scale. However, the spatio-temporal variability of ditch networks and the impact of this variability on hydrological processes has not been quantified. The aim of this thesis is thus to quantify the relation between the spatial configuration of ditch networks and the hydrological functioning of Mediterranean vineyards. First, the variability of ditch network density and the extent to which this density depends on the landscape attributes are analyzed. Then, a network simulator is used with a hydrological model to quantify the impact of ditch network density on runoff. In relation to the role of ditch networks in the interception of runoff on hillslopes, the protection against soil erosion procured by ditch networks is studied thanks to geomorphological indicators. Secondly, the spatio-temporal evolution of vegetation covers in ditch networks and its impact on the transfer of pesticides is analyzed. The ditch management regimes and their impact on ditch vegetation are simulated. Thanks to several indicators, it is shown that current management regimes are not optimal in view of pesticide retention. This thesis shows the interest in using a landscape structure model and a landscape functioning model. This allowed to quantify the impact of ditch networks on hydrological processes.
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https://tel.archives-ouvertes.fr/tel-00745506
Contributor : Florent Levavasseur <>
Submitted on : Thursday, October 25, 2012 - 4:26:59 PM
Last modification on : Friday, April 9, 2021 - 5:06:02 PM
Long-term archiving on: : Saturday, January 26, 2013 - 5:20:09 AM

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  • HAL Id : tel-00745506, version 1
  • PRODINRA : 244329

Citation

Florent Levavasseur. Structure du paysage et fonctionnement hydrologique : application aux réseaux de fossés en zone viticole méditerranéenne.. Ingénierie de l'environnement. Montpellier SupAgro, 2012. Français. ⟨tel-00745506⟩

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