Paul Hudson is Associate Professor of Physical Geography at Leiden University, The Netherlands. After completing a PhD in fluvial geomorphology at Louisiana State University, Hudson was Assistant and then Associate Professor at the University of Texas at Austin for fourteen years, until his move to The Netherlands. His current projects examine river management and geomorphology along rivers in Northern Europe, Texas, and the Lower Mississippi River in Louisiana.
Hans Middelkoop is full professor of Physical Geography at Utrecht University. After completing his PhD on embanked floodplains at Utrecht University, Middelkoop was employed at the Netherlands' national Institute for Inland Water Management and Wastewater Treatment (RWS-RIZA). Since 1999 Middelkoop has been appointed at Utrecht University. His research group examines the morphodynamics of rivers, floodplains and deltas across a range of scales, and how these change in response to internal fluvial dynamics, climate, land use changes and human impact. Middelkoop has been active in numerous research projects related to river restoration.