US-IALE 2018 has ended
Back To Schedule
Monday, April 9 • 10:45am - 11:00am
SYMPOSIA-05: Inundation Dynamics of the Upper Mississippi River Floodplain: Understanding Spatial and Temporal Patterns of a Critical Ecosystem Process to Inform Large-river Management

Sign up or log in to save this to your schedule, view media, leave feedback and see who's attending!

AUTHORS: Molly Van Appledorn*, Nathan R. De Jager, Jason J. Rohweder, James T. Rogala – U.S. Geological Survey Upper Midwest Environmental Science Center

ABSTRACT: Flooding is a dominant physical process that drives the form and function of the Upper Mississippi River System (UMRS). Despite its importance, inundation patterns have not been systemically characterized in spatially-explicit ways that would advance understanding of ecological processes or inform management actions in the UMRS. We developed a geospatial model of floodplain inundation using topo-bathymetric terrains and 40 years of daily water surface elevations. We applied the model across 2.8 million acres of the UMRS and summarized long-term patterns of surface water dynamics in terrestrial areas including inundation frequency, duration, depth, and timing. We found that distributions of these flooding attributes varied within and among multiple levels of river organization, including navigational pools and geomorphic reaches. Non-linear relationships among inundation attributes and their geospatial distributions likely reflect complex interactions among topographic, hydrologic, and anthropogenic constraints on flooding dynamics. We discuss current and future applications of the inundation model to advance process-based knowledge of ecological phenomena and to inform management decisions in the UMRS floodplain.

Monday April 9, 2018 10:45am - 11:00am CDT
Water Tower Parlor

Attendees (2)