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Service Description: Floodplain inundation is believed to be the dominant physical driver of an array of ecosystem patterns and processes in the Upper Mississippi River System (UMRS). Here, we present the results of a geospatial surface-water connectivity model in support of ecological investigations fully described in the USGS Open File Report entitled “Indicators of Ecosystem Structure and Function for the Upper Mississippi River System” (De Jager et al., in review). Briefly, we identified likely instances of floodplain submergence by comparing a daily time series of gage-derived water surface elevations to topo-bathymetric data modified to account for slopes and hydrologic routing. The resulting raster attribute table contains columns for unique characterizations of surface water inundation dynamics (including measures of event frequency, duration, depth, and timing), yearly sums of the number of days a surface was inundated, and a classification of floodplain areas based on average annual duration values.

Map Name: UMRS Floodplain Inundation Attributes

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Layers:

• Mean growing season flood duration (0)
  • Boundary (1)
  • Footprint (2)
  • MeanGsFd (3)
• Average number of growing season flood events (4)
  • Boundary (5)
  • Footprint (6)
  • AveEvNum (7)
• Median number of days a flood event lasts (8)
  • Boundary (9)
  • Footprint (10)
  • MedEventDu (11)
• Total number of years with growing season flood event (12)
  • Boundary (13)
  • Footprint (14)
  • FloodYrs (15)
• Maximum flood depth (median over growing season) (16)
  • Boundary (17)
  • Footprint (18)
  • MedMaxDep (19)
• Median day of year of maximum flood depth (20)
  • Boundary (21)
  • Footprint (22)
  • MedPkDay (23)

Description:

Copyright Text: U.S. Army Corps of Engineer’s Upper Mississippi River Restoration Program; USGS Upper Midwest Environmental Sciences Center

Spatial Reference: 26915  (26915)


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Spatial Reference: 26915  (26915)

Full Extent:

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Spatial Reference: 26915  (26915)

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Keywords: hydrogeomorphology, flood regime, floodplain, hydrology, inundation, Upper Mississippi River, Illinois River
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