Doug Shields has forty-two years of experience in water resources and environmental engineering, including twelve years for the U.S. Army Corps of Engineers and twenty-two years as a Research Hydraulic Engineer at the National Sedimentation Laboratory in Oxford, Mississippi. Dr. Shields’ research focused on response of fluvial systems to human influences and development of environmental design criteria for all types of channel stabilization and modification projects, including stream bank erosion controls and management of riverine backwaters. Doug has authored or co-authored more than 300 technical publications and has completed consulting projects dealing with stream restoration, erosion protection of riparian cultural resources sites, stream bank erosion, geomorphic assessment, local flooding, vegetation on levees, large wood, and effects of floodplain and riparian vegetation on flow resistance. He is the senior author for the stream restoration chapter in the American Society of Civil Engineers Manual of Practice 110: Sedimentation Engineering: Processes, Measurements, Modeling, and Practice.