AGRHYS: an observatory of the critical zone in the context of high anthropogenic pressures (intensive livestock farming); research issues

Philippe Mérot (1) , Chantal Gascuel (1) , Laurent Ruiz (1) , Gérard Gruau (2) , Luc Aquilina (2) , Michael Faucheux (1)

1 SAS - Sol Agro et hydrosystème Spatialisation
2 GR - Géosciences Rennes

The Observatory for Research on Environment AgrHyS(AgroHydroSystems) is located in a catchment area of intensive farming in Britain. This is a twin site (Kerbernez and Naizin) monitoring since 1976, and where various measures were greatly strengthened since 2000, and have special characteristics: classical variables (rainfall, flow rates), major elements in daily frequency; CFC to measure response time; level of groundwater and dissolved elements in 70 piezometers, nutrients etc.. - The issue of response time in these systems constrained by strong anthropogenic pressures and non-equilibrium status is central. - The role of biogeochemical hot spot as are the wetlands concerning the dynamics of DOC (source), NO3 (sink) or phosphorus (source / sink) is a privileged object of study. - The massive amount of input modifies the conditions of storage, processing and chemical erosion. - The characterization of the inputs is a problem specific to these systems - Recently the inclusion of the atmospheric phase of C and N cycles has completed the issue at stake

Domaines: Environnement et Société

Philippe Mérot, Chantal Gascuel, Laurent Ruiz, Gérard Gruau, Luc Aquilina, et al.. AGRHYS: an observatory of the critical zone in the context of high anthropogenic pressures (intensive livestock farming); research issues. European Geosciences Union General Assembly 2011, Apr 2011, Vienne, Austria. pp.EGU2011-6967. ⟨insu-00668601⟩