1. Inra, UMR1069, Sol Agro et hydrosystème Spatialisation, FR-35000 Rennes, France
2. Agrocampus Ouest,
UMR1069, Sol Agro et hydrosystème Spatialisation, FR-35000 Rennes, France
3. Department
of Environmental Systems Science, ETH Zürich, CH-8092 Zürich, Switzerland
4. Swiss Federal Research Institute WSL, CH-8903 Birmensdorf, Switzerland
5. Géosciences
Rennes, Université de Rennes I, UMR6118, CNRS, FR-35000 Rennes, France