Molly Van Appledorn 20180905 remote-sensing image Reston, VA U.S. Geological Survey https://doi.org/10.5066/P9ITQTNQ Molly Van Appledorn Matthew E. Baker Andrew J. Miller 20190103 publication Ecosphere vol. 10, issue 1 n/a Wiley https://doi.org/10.1002/ecs2.2546 The shapefiles depict the 2D HEC-RAS hydraulic modeling domains used for the simulations described in the associated publication. Model domains were delineated in the HEC-RAS geometry editor to encompass river-valley bottoms and adjacent hillslopes of four river reaches of contrasting contributing area and morphology: Seneca Creek at Dawsonville, MD; Patapsco River at Woodstock, MD; Patuxent River at Unity, MD; and Little Gunpowder Falls at Laurel Brook, MD. The model domains represent primary input to the HEC-RAS 2D hydraulic software and were used to bound numerical computations within the software. 20150801 20180313 ground condition Complete None planned -180.0 180.0 90.0 -90.0 ISO 19115 Topic Category biota None flood regime floodplain inundation hydrology hydrogeomorphology USGS Metadata Identifier USGS:5b912126e4b0702d0e8085a6 None Seneca Creek, Dawsonville, Maryland, USA Patapsco River, Woodstock, Maryland, USA Patuxent River, Unity, MD, Maryland, USA Little Gunpowder Falls, Laurel Brook, Maryland, USA None. Please see 'Distribution Info' for details. None. Users are advised to read the data set's metadata thoroughly to understand appropriate use and data limitations. Molly Van Appledorn U.S. Geological Survey, MIDWEST REGION Ecologist mailing and physical

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La Crosse WI 54603 US 608-781-6323 mvanappledorn@usgs.gov This work was supported by Maryland Sea Grant under awards NA10OAR4170072 and NA14OAR4170090from the National Oceanic and Atmospheric Administration, U.S. Department of Commerce. Data were visually checked for accuracy Data were spot checked for logical accuracy Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. A formal accuracy assessment of the vertical positional information in the data set has either not been conducted, or is not applicable. Model domains were defined within HEC-RAS geometry editor using standard protocols for HEC-RAS model development. Modeling domains were constructed within HEC-RAS by manual delineation. The terrain model was used to guide the delineation but not directly invoked; borders of each domain were drawn well outside the bounds of any potential flood extent as interpreted through comparisons with terrain models. 20150801 Model domains were exported from HEC-RAS as multipart feature shapefiles: 20150801 20150801 Multipart feature shapefiles were converted to singlepart feature shapefiles: 20180313 20180313 Attributes within singlepart feature shapefiles were dissolved to clearly convey model domain boundary: 20180313 20180313 Lab computer processing U.S. Army Corps of Engineers 2016 U.S. Army Corps of Engineers, Institute for Water Resources, Hydraulic Engineering Center, Davis, CA. Report #CPD-68. 960pp. https://www.hec.usace.army.mil/software/hec-ras/documentation.aspx U.S. Army Corps of Engineers 2016 U.S. Army Corps of Engineers, Institute for Water Resources, Hydraulic Engineering Center, Davis, CA. Report #CPD-68A. 171pp. https://www.hec.usace.army.mil/software/hec-ras/documentation.aspx Patuxent_ModelDomain.shp Attribute Table Table containing attribute information associated with the data set. Producer defined FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. ORIG_FID q Producer defined 0 q Producer defined id numerical identifier with arbitrary value Producer defined << empty cell >> numerical identifier with arbitrary value Producer defined U.S. Geological Survey - ScienceBase mailing and physical

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Denver CO 80225 USA 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 on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. 20220616 Molly Van Appledorn U.S. Geological Survey Ecologist mailing and physical

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La Crosse WI 54603 US 608-781-6323 mvanappledorn@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 Record created using USGS Metadata Wizard tool. (https://github.com/usgs/fort-pymdwizard)