Contrasted distribution of colloidal and true dissolved phosphorus in shallow groundwaters from a small, lowland agricultural catchment

Sen GU1,2, Gerard Gruau1,3, Rémi Dupas4,5, Camille Rivard6, Chantal Gascuel-odoux4,5 and Jean-Marcel Dorioz7, (1)CNRS-Universite de rennes 1, UMR-Geoscience, Rennes, France, (2)Géosciences Rennes, UMR CNRS 6118 - Université Rennes 1, Rennes, France, (3)CNRS, UMR 6118, Géosciences Rennes, Rennes, France, (4)Agrocampus Ouest, UMR1069, Sol Agro and hydroSystem, Rennes Cedex, France, (5)INRA Rennes, Rennes Cedex, France, (6)ESRF European Synchrotron Radiation Facility, Grenoble, France, (7)INRA, UMR CARRTEL, Thonon-les-Bains, France