Brian Collins is a geomorphologist who studies rivers and their watersheds and their linkages with biota and humans. He is interested in how physical process and history, both human and natural, give rise to the modern landscape, and in using that perspective to inform our current and future interactions with the landscape; his work has applications that include restoring and managing rivers and their fisheries, reducing hazards, adapting to climate change, and mitigating effects of hydropower dams. His research has included such topics as erosion and sedimentation after the eruption of Mount St. Helens, reconstructing historical changes to riverine habitats in the Puget Sound lowland, erosion and land use history in the Yangtze River headwaters, the bio-physical dynamics of forested river valleys, and the geomorphology of flooding in western Washington.