Distinguished University Professor, University of Maryland

Professor of Environmental Planning, University of California Berkeley

Emeritus Professor of Physical Geography, University of Nottingham, UK

Professor für Gewässerökologie

University of the Basque Country

Chair in Aquatic BioSciences, Swansea University, BioSciences

The Nature Conservancy (retired)

University of Natural Resources and Life Sciences, Vienna (BOKU)

Deltares, the Netherlands, Wageningen University

Catedrático de la Universidad Politécnica de Madrid