Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free:

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site:, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Google Analytics

Targeted advertising cookies


The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at or by post at:

24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal Logo umrsas

Home page

Umr sas

VIAUD Valérie


Equipe : MO-Sol

Tél : 02 23 48 51 42
 Fax : 02 23 48 54 30

  UMR INRA/Agrocampus 1069 SAS
 Sol Agro et hydrosystème Spatialisation

65, rue de St-Brieuc
 CS 84215
 35042 Rennes Cedex - France



Activités - Fonctions



 Chercheur en Agronomie

  • Modélisation intégrée de l’impact des effluents organiques sur la qualité des sols à l’échelle des paysages agricoles,
  • Modélisation de paysages (sol, pratiques agricoles, structures tampons) et de leur évolution,
  • Qualité des sols, dynamique et stocks de matière organique dans le sol,
  • Approches spatiales : SIG, statistiques spatiales, écologie du paysage

See also

Travaux – Publications :

 Activités passées

  • 2001-2004 (doctorat, INRA UR SAD-Paysage et UMR SAS Rennes) : impact de l’organisation spatio-temporelle des paysages bocagers sur les transferts d’eau et de nutriments à l’échelle de petits bassins versants. Développement de compétences en écologie du paysage et en modélisation.
  • 2005-2006 (post-doctorat, INRA MIA Jouy-en-Josas) : modélisation stochastique spatiale dans le cadre d’un projet dédié à l’étude des flux de gènes dans les paysages agricoles. Analyse de sensibilité des modèles de flux à l’organisation du paysage.


  • Gaucherel, C. ; Giboire, N. ; Viaud, V. ; Houet, T. ; Baudry, J. ; Burel, F., 2006. A domain-specific language for patchy landscape modelling: the Brittany agricultural mosaic as a case study. Ecological Modelling, 194 (1-3) : 233-243.
  • Viaud, V. ; Durand, P. ; Merot, P. ; Sauboua, E. ; Saadi, Z., 2005. Modeling the impact of the spatial structure of a hedge network on the hydrology of a small catchment in a temperate climate. Agricultural Water Management 74: 135-163.
  • Viaud, V. ; Merot, P. ; Baudry, J., 2004. Hydrochemical buffer assessment in agricultural landscapes, from local to catchment scale. Environmental Management 34 (4) : 559-573.
  • Grimaldi, C. ; Viaud, V. ; Massa, F. ; Carteaux, L. ; Desrosch, S. ; Regeard, A. ; Fauvel, Y. ; Gilliet, N. ; Rouault, F., 2004. Stream nitrate variations explained by groundwater head fluctuations in a pyrite-bearing aquifer. Journal of Environmental Quality 33: 994-1001.