.. .. Study-area,

. .. Methods, 127 7.4.2 Simulation of the seasonal variation in ditch vegetation covers

. .. Results, 135 7.5.3 Seasonal variability of the mitigation of pesticide transfer

. .. Discussion, 140 7.6.1 Impact of ditch management regimes

.. .. Conclusion,

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, A Liste des travaux et publications issus du travail de thèse ou

J. Bailly, F. Levavasseur, and P. Lagacherie, A spatial stochastic algorithm to reconstruct artificial drainage networks from incomplete network delineations, International Journal of Applied Earth Observation and Geoinformation, vol.13, issue.6, pp.853-862, 2011.
URL : https://hal.archives-ouvertes.fr/hal-00622413

F. Levavasseur, P. Lagacherie, J. S. Bailly, A. Biarnès, C. et al., Spatial modeling of man-made drainage density of agricultural landscapes
URL : https://hal.archives-ouvertes.fr/hal-01496749

F. Levavasseur, A. Biarnès, J. Bailly, and P. Lagacherie, Detrimental impacts of management regimes of drainage ditches on the mitigation of pesticide transfer to surface water, Ecosystems & Environment

F. Levavasseur, J. S. Bailly, P. Lagacherie, F. Colin, and M. Rabotin, Simulating the effects of spatial configurations of agricultural ditch drainage networks on surface runoff from agricultural catchments, Hydrological Processes, 2012.
URL : https://hal.archives-ouvertes.fr/hal-00794108

C. Bailly, J. S. Levavasseur, and F. , Potential of linear features detection in a mediterranean landscape from 3D VHR optical data : application to terrace walls, IGARSS 2012, 2012.
URL : https://hal.archives-ouvertes.fr/hal-02598579

F. Levavasseur, J. S. Bailly, P. Lagacherie, F. Colin, and M. Rabotin, Étude de l'impact des structures spatiales de réseau de fossés agricoles sur l'hydrologie d'un bassin versant : un exemple d'utilisation de la plateforme de modélisation intégrée du paysage OpenFluid, Payote, 2011.

F. Levavasseur, J. S. Bailly, P. Lagacherie, F. Colin, and M. Rabotin, Impact of drainage network geometry on runoff in cultivated landscape : a quantitative study using stochastic simulations mixing DEM to vector data, European Geosciences Union General Assembly, 2011.

F. Levavasseur, J. S. Bailly, P. Lagacherie, F. Colin, and M. Rabotin, Modelling runoff uncertainties in agricultural catchments using a stochastic vector drainage algorithm and error propagation, Geomorphometry, 2011.
URL : https://hal.archives-ouvertes.fr/hal-02595924

F. Levavasseur, J. S. Bailly, P. Lagacherie, F. Colin, and M. Rabotin, Uncertainties of cultivated landscape drainage network mapping and its consequences on hydrological fluxes estimations, Spatial Accuracy, 2010.
URL : https://hal.archives-ouvertes.fr/hal-00576900

F. Travaux-de-vulgarisation-levavasseur, J. S. Bailly, P. Lagacherie, F. Colin, and M. Rabotin, Modélisation de l'impact des réseaux de fossés sur le ruissellement de surface, 2012.

F. Levavasseur, J. S. Bailly, P. Lagacherie, F. Colin, and M. Rabotin, Crues et inondations : le rôle des fossés agricoles dans la maîtrise des risques. Fiche de presse INRA, 2012.

A. Bellet and A. , Typologies des aménagements linéaires hydro-agricoles de la plaine viticole languedocienne (Hérault), 2010.

, ? 4) Problèmes associés aux buses en général

, VI Caractérisation de l'exploitation ? SAU totale : ? Productions et superficie par production : ? ha de vignes dont ha en production : ? Statut foncier des terres : ? Lieu(x) de vinification : ? Volume, vol.produit

. ?-catégorie-de-vins and . Produit,

?. Statut, Année de création / d'installation : ? Nombre d'associés/exploitants : ? Âge des exploitants : ? Activités des exploitants : ? Agriculteurs à temps plein

?. Pluri-actif, Si oui, quelle(s) activité(s) en dehors de l'exploitation? ? Retraité : Depuis quand ? De quel domaine

. ?-ressources-externes,

, Niveau de formation des exploitants : ? Main d'oeuvre : nombre de permanents / de temps plein / d'aides : ? Types de production (conventionnelle, biologique, raisonnée, certification ou pas ?) Superficies concernées ?

. ?-démarche-environnementale, Avec ou sans aide

, ? Entretien du sol dans les parcelles de vigne ? Entretien des fourrières ? ? Structure du parcellaire (taille moyenne des parcelles

, ? Quantités de linéaires (% de parcelles bordées

, ? Matériel disponible pour l'entretien des fossés, p.3

. Depuis-quand-exploitez-vous-la-parcelle-:-___________________________________-entretenez-vous-le-fossé-?-?-oui-?-non-si-non, Éviter le comblement / débordement ? Maintenir la fonction de drainage ? Autres : _______________ Régularité : ? Régulier ? Cas par cas, si oui quel déclencheur : _______________________________________________ Fréquence moyenne (/ 10 ans, Période (mois) : _________________ Date du dernier : _________ Matériel : _____________________________________________________________________________________________ ? Sous-traitance ? CUMA Désherbage chimique : Paroi : ? Oui ? Non Fond : ? Oui ? Non Si non, depuis quand : ________ et pourquoi : ? Coût ? Environnement ? Érosion ? Autres : ___________________ Si oui, objectif : ? Éviter les bouchons ? Bords propres ? Passage des engins ? Visibilité ? Contenir les invasives (ronces, cannes...) ? Autres : ____________________________________________________ Régularité : ? Régulier ? Cas par cas,si oui quel déclencheur : _______________________________________________ Fréquence moyenne (/ 10 ans) : _________________ Période (mois) : _________________ Date du dernier : _________ Produit : _____________________________________________________________________________________________ Matériel : ____________________________________________________________________________________________ Fauche : Paroi ? Oui ? Non Fond : ? Oui ? Non

. Si-non, et pourquoi : ? Coût ? Pas assez efficace ? Autres : _________________________ Si oui, objectif : ? Éviter les bouchons ? Bords propres ? Passage des engins ? Visibilité ? Contenir les invasives (ronces, cannes...) ? Autres : _____________________________________________________ Régularité : ? Régulier ? Cas par cas, si oui quel déclencheur : _______________________________________________ Fréquence moyenne (/ 10 ans) : _________________ Période (mois) : _________________ Date de la dernière : _______ Matériel

. Si-non, et pourquoi : ? Risque d'incendie ? Environnement ? Maintien des arbres ? Érosion ? Autres : _______________________________ Si oui, objectif : ? Éviter les bouchons ? Bords propres ? Passage des engins ? Visibilité ? Contenir les invasives (ronces, cannes...) ? Autres : _____________________________________________________ Régularité : ? Régulier ? Après fauche ? Cas par cas, si oui quel déclencheur : _______________________________ Fréquence moyenne (/ 10 ans) : _________________ Période (mois) : _________________ Date du dernier : _________ Intervention sur les arbres / arbustes ? Oui ? Non

. Si-non, et pourquoi : ? Inutile ? Entretien empêche repousse ? Autres : _________________ Type d'intervention : ? Abattage ? Elagage ?

S. Oui, objectif : ? Éviter les bouchons ? Bords propres ? Passage des engins ? Visibilité ? Gêne de la vigne ? Autres : __________ Régularité : ? Régulier ? Cas par cas

, Période (mois) : _________________ Date du dernier : __________ Matériel : _____________________________________________________________________________________________ ? Sous-traitance ? CUMA Autres : _____________________________________________________________________________________________ ENTRETIEN DES ABORDS DU FOSSÉ

, Entretenez vous les abords du fossé ? ? Oui ? Non Si non, depuis quand : ________ et pourquoi : ? Coût ? Manque de temps ? Entretien inutile ? Autres : _________ Si oui : ? Fauche ? Désherbage ? Labour ? Brûlis ? Abattage des arbres ? Autres : ______________________ Occupation du sol : ? Vigne ? Labour ? Verger ? Autres : __________________ si vigne, production (hl) : _________ Parcelle drainée : ? Oui ? Non si oui

?. Statut-foncier-de-la-parcelle-;-?-propriété-?-fermage and . Autres, Exploitant de la parcelle voisine : ? Oui ? Non Entretien de l'interrang de la parcelle (en nb de rang) : ? Labour : _______ ? Désherbage en plein : _______ ? Enherbement permanent : ________ ? Enherbement temporaire maîtrisé à l'herbicide : _____ Entretien du rang de la parcelle : ? Désherbage ? Intercep

?. Isolée, ?. Dans-un, and . Îlot, Eloignée du siège ? Proche du siège Année d'installation : ___________ Double-actif : ? Oui ? Non Qui s'occupe de l'entretien des fossés : ____________ Statut du décideur : _______________ Surface (ha) : ________ Surface en vigne (ha) : _______ Vinification : ? cave particulière ? cave coopérative, si oui laquelle : ___________________ Catégorie de vin (principales) : ? AOP ? VDP ? VDT Nombre : -d'exploitants : ____ -de temps plein : ____ -de temps partiel en équivalent temps plein : ____ Type de production : ? Conventionnelle ? Raisonnée ? Biologique Certification

, Autre démarche environnementale : _______________________________________________________________________ Résumé L'influence des fossés dans les phénomènes de crue, d'érosion hydrique des sols ou de transferts de polluants agricoles est bien connue à l'échelle locale. Cependant, on ne dispose que de peu de connaissances sur la variabilité spatio-temporelle des réseaux de fossés et de l'effet de cette variabilité sur les processus hydrologiques. L'objectif de ce travail de thèse vise donc à quantifier la relation entre l'organisation spatiale et temporelle des réseaux de fossés

, En lien avec son rôle d'interception du ruissellement, l'effet anti-érosif des réseaux de fossés est alors analysé grâce à l'utilisation d'indicateurs géomorphologiques. Dans un second temps, on s'intéresse à la dynamique spatio-temporelle de la végétation des fossés et à son impact sur les transferts de pesticides. Pour cela, on caractérise puis simule les pratiques d'entretien des fossés et leurs impacts sur la végétation. On montre alors en mobilisant différents indicateurs que les pratiques actuelles ne sont pas optimales d'un point de vue de la rétention des pesticides, Dans un premier temps, on propose d'analyser comment la densité des réseaux de fossés varie dans les paysages et à quel point elle est conditionnée par le milieu physique

, Paysages viticoles méditerranéens, linéaires paysagers, fossés, ruissellement, érosion hydrique, rétention de pesticides, pratiques d'entretien, simulation spatiale, modélisation hydrologique