BEYOND THE CHANNEL - DYNAMIC ALLUVIAL VALLEY PERFORMANCE STANDARDS_207_LEBERG
Stream restoration practice is becoming increasingly dynamic and multifaceted, as floodplain
restoration strategies become more commonplace (e.g., legacy sediment removal, Stage 0
Restoration, beaver-related restoration, etc.). These techniques generally incorporate a larger
section of the floodplain, create multiple channels, and may change in form over the
monitoring period. Although these techniques have the potential for greater ecological
function where appropriate, existing regulatory frameworks (designed for single-thread,
perennial, transport reaches) have consistently lagged behind restoration trends. In this
session I will first present the challenges that floodplain restoration presents to existing
channel-based frameworks generally, and to compensatory mitigation specifically. I will then
explore how these challenges are actively being addressed by existing methods, and present
potential evaluation strategies for dynamic floodplain systems. Finally, I will present a
comprehensive list of performance metrics and discuss potential credit and debiting
strategies. This presentation will look at stream restoration in a national context and
incorporates the input from expert practitioners, regulators, and academics. This work
reflects the culmination of three years of research, conducted as an ORISE fellow in the
Freshwater and Marine Regulatory Branch at the EPA.