Kirstie Fryirs is a Senior Lecturer in the Department of Environment and Geography at Macquarie University in Sydney, Australia.  She has worked extensively on river systems in Australia.  Her research focuses on geomorphic river evolution, post-European disturbance responses, sediment budgets and connectivity, and geoecology. Her research is used extensively in river management practice.

Gary Brierley is Chair of Physical Geography in the School of Environment at the University of Auckland, New Zealand. Building upon his geomorphic research on river systems in western Canada, Australia and New Zealand, his recent work has been undertaken in western China and parts of South America. His research interests also include concerns for environmental justice, transitional practices in river science and management, and emerging approaches to environmental governance.