1. Institute for Sustainable Resources Bartlett School of Environment, Energy and Resources, University College London London UK
2. Soil and Terrestrial Environmental Physics, Department of Environmental Systems Science ETH Zürich Zürich Switzerland
3. Institute of Environmental Engineering, ETH Zurich Zürich Switzerland
4. Department of Civil and Environmental Engineering National University of Singapore Singapore
5. Bordeaux Sciences Agro, UMR 1391 INRA ISPA Gradignan Cedex France
6. Nicholas School of the Environment, Duke University Durham North Carolina USA
7. Division of Hydrologic Sciences Desert Research Institute Reno Nevada USA