Molly Van Appledorn Jason J. Rohweder Nathan R. De Jager 20240605 1 raster digital data 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 relative elevation of a slope-detrended floodplain terrain surface and river mile location used to map surface water depths derived from gaging locations along UMRS, as described in Van Appledorn et al. (2021; doi: 10.1002/rra.3628). We excluded areas permanently wetted (aquatic areas), surfaces in agricultural production, roads, and developed areas. The data are intended for use in geospatial analyses of UMRS floodplain ecosystem patterns and processes. These data were developed to describe hydrologic conditions of non-aquatic areas in the Upper Mississippi River System when joined with appropriate hydrologic data. Examples of appropriate use include stratifying regional sampling efforts or monitoring programs, providing context for interpreting fine-scale studies of local inundation patterns, or development of floodplain functional classes using additional flood metrics. See the following citation for a full description of the terrain processing that was used to generate this dataset: Van Appledorn, M., N. R. De Jager, and J. J. Rohweder. 2021. Quantifying and mapping inundation regimes within a large river‐floodplain ecosystem for ecological and management applications. River Research and Applications 37:241–255. doi: 10.1002/rra.3628 20230809 publication date Complete None planned -91.1231 -90.6022 42.7835 42.5450 USGS Thesaurus floods freshwater ecosystems river systems hydrology Lithologic classification of geologic map units Flood plain USGS Metadata Identifier USGS:661eacfdd34e7eb9eb7e3d83 Common geographic areas Upper Mississippi None None Molly Van Appledorn U.S. Geological Survey, MIDCONTINENT REGION Research Ecologist mailing address

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La Crosse WI 54603 US 608-781-6323 608-783-6066 mvanappledorn@usgs.gov This work was funded by the U.S. Army Corps of Engineers' Upper Mississippi River Restoration Program Molly Van Appledorn Nathan R DeJager Jason Rohweder 2018 dataset https://www.sciencebase.gov U.S. Geological Survey https://doi.org/10.5066/f7vd6xrt Molly Van Appledorn Nathan R. De Jager Jason J. Rohweder 20200417 publication River Research and Applications vol. 37, issue 2 n/a Wiley ppg. 241-255 https://doi.org/10.1002/rra.3628 Molly Van Appledorn Nathan R. De Jager Jason J. Rohweder 20230803 publication Journal of the American Water Resources Association n/a n/a Wiley https://doi.org/10.1111/1752-1688.13152 Visual spot checks on spatial data and attribute table results completed. Data were spot checked for attribute accuracy: values fall within expected ranges and duplicates/omissions checked. Visual spot checks on spatial data and attribute table results completed. Data were spot checked for logical accuracy: values fall within expected ranges and duplicates/omissions checked. Data are complete for Pool 11 of the Upper Mississippi River A formal accuracy assessment of the horizontal positional information in the dataset has not been conducted. A formal accuracy assessment of the vertical positional information in the dataset has either not been conducted, or is not applicable. Molly Van Appledorn Nathan R DeJager Jason Rohweder 2018 dataset https://www.sciencebase.gov U.S. Geological Survey https://doi.org/10.5066/f7vd6xrt Digital and/or Hardcopy 19720401 20110930 publication date UMRS Floodplain Inundation Attribute Rasters The "Value" column of the UMRS Floodplain Inundation Attribute Rasters (Pool 11) was retained as the "Value" column in this raster. All terrain processing steps referenced in the UMRS Floodplain Inundation Attribute Rasters was used to generate "handval" and "SHEDID" columns in this raster. UMRS Floodplain Inundation Attribute Rasters were processed by retaining the "Value" column. All terrain processing steps referenced in the UMRS Floodplain Inundation Attribute Rasters was used to generate "handval" and "SHEDID" columns in this raster. UMRS Floodplain Inundation Attribute Rasters 20230809 Raster Grid Cell 6890 10505 1 Universal Transverse Mercator 15 0.9996 -93.0 0.0 500000.0 0.0 row and column 4.0 4.0 meters North_American_Datum_1983 GRS 1980 6378137.0 298.257222101004 p11_im.tif Raster geospatial data file. Producer defined OID Internal object identifier. Producer defined Sequential unique whole numbers that are automatically generated. Value Unique numeric values contained in each raster cell. Producer defined 3 97080 Count Number of raster cells with this value. Producer defined 1.0 8936 handval Slope-detrended relative elevation value computed according to a modified Height Above Nearest Drainage method as described in Van Appledorn et al. 2021 (doi: 10.1002/rra.3628) Producer defined 0.1 23.5 feet SHEDID River mile identifier, where river mile was defined using a modified watershed delineation approach as described in Van Appledorn et al. 2021 (doi: 10.1002/rra.3628) Producer defined 583.1 614 river mile U.S. Geological Survey GS ScienceBase mailing address

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Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P13BRXXJ None 20240605 Molly Van Appledorn U.S. Geological Survey, MIDCONTINENT REGION Research Ecologist mailing address

2630 Fanta Reed Road

La Crosse WI 54603 US 608-781-6323 608-783-6066 mvanappledorn@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998