Katherine R. Barnhart Jason W. Kean Donald N. Lindsay Eric L. Bilderback 20250714 vector digital data https://doi.org/10.5066/P13GYER5 Postfire debris-flow runout hazard assessment for the El Dorado and Apple event that began on or near 2020-07-31, version 2m-tile-unbreached. The files, data fields, and metadata included in this assessment are described by version 1.0.0 of the PWFDF-R Data Specification. You can find the specification here: https://doi.org/10.5066/P15CKL9J This repository is intended to archive results from debris-flow hazard assessments for recent, recovering, and historical burn areas. 20250714 assessment date Complete As needed -117.09350958492504 -116.69737873033964 34.219446571883054 33.91978499356905 ISO 19115 Topic Category geoscientificInformation USGS information products data release USGS Thesaurus landslides hazards fires maps and atlases landslide susceptibility assessment hazard preparedness mathematical modeling USGS Metadata Identifier USGS:687db598d4be021cf36dddfd No access constraints. Please see 'Distribution Information' for details. These data are marked with a Creative Common CC0 1.0 Universal License (https://creativecommons.org/publicdomain/zero/1.0/). These data are in the public domain and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. GHSC Data Steward US Geological Survey, Geologic Hazards Science Center GHSC Data Steward mailing and physical

1711 Illinois St

Golden CO 80401 US 3032738500 ghsc_metadata@usgs.gov Input datasets may be provided by partners of the Landslide Hazards Program. These partners include, but are not limited to: BAER, GTAC, and EROS. ursa v1.0.0 via Python >=3.11 on MacOSX or the U.S. Geological Survey High Preformance Computer Denali Assessments are reviewed by USGS personnel prior to publication. Personnel may modify stream network delineation and modeling parameters in order to ensure quality. No formal logical tests were performed. The assessment results represent areas within or downstream of the fire perimeter, pursuant to the modeling criteria of the ursa package. EROS BARC Package 20250714 vector digital data Digital and/or Hardcopy 20250714 Access Date perimeter Used to define the burn area. USGS National Map 1/3rd arc-second DEM 20250714 raster digital data https://www.sciencebase.gov/catalog/item/4f70aa9fe4b058caae3f8de5 Digital and/or Hardcopy 20250714 Access Date dem Used to compute flow pathways, slopes, and vertical relief. EROS BARC Package 20250714 raster digital data Digital and/or Hardcopy 20250714 Access Date dnbr Informs the M1 likelihood model. EROS BARC Package 20250714 raster digital data Digital and/or Hardcopy 20250714 Access Date severity Informs network delineation, the M1 likelihood model, and the volume model. STATSGO KFFACT 20250714 raster digital data https://doi.org/10.5066/P13WAPYV Digital and/or Hardcopy 20250714 Access Date kf Informs the M1 likelihood model. LANDFIRE 240EVT 20250701 raster digital data https://lfps.usgs.gov/arcgis/rest/services/LandfireProductService/GPServer/LandfireProductService/ Digital and/or Hardcopy 20250701 Access Date evt Informs network delineation. The assessment was produced by running the ursa command line tool on the input datasets. The ursa tool can be found here: https://code.usgs.gov/ghsc/lhp/ursa 20250714 Vector String 530 Universal Transverse Mercator 11 0.9996 -117 0.0 500000.0 0.0 coordinate pair 0.6096 0.6096 meters North_American_Datum_1983 GRS 1980 6378137.0 298.257222101 basins Attribute Table Table containing attribute information associated with the basins. Producer Defined SegmentID Unique, ascending, non-sequential integer ID assigned to each stream segment. Producer Defined 1 Inf P_35 Debris-flow likelihood for a design storm with a peak 15-minute rainfall intensity of 35 mm/hour. Producer Defined 0 1 V_35 Potential sediment volume for a design storm with a peak 15-minute rainfall intensity of 35 mm/hour. Producer Defined 0.0 Inf Cubic meters Vmin_35 Lower bound of the 68% confidence interval for potential sediment volume for a design storm with a peak 15-minute rainfall intensity of 35 mm/hour. Producer Defined 0.0 Inf Cubic meters Vmax_35 Upper bound of the 68% confidence interval for potential sediment volume for a design storm with a peak 15-minute rainfall intensity of 35 mm/hour. Producer Defined 0.0 Inf Cubic meters Terrain_M1 Terrain variable for the M1 model. The proportion of catchment area that is both (1) burned at moderate-or-high severity, and (2) has a slope angle of at least 23 degrees. Producer Defined 0.0 1 Fire_M1 Fire variable for the M1 model. Mean catchment dNBR divided by 1000. Producer Defined -Inf Inf Unitless Soil_M1 Soil variable for the M1 model. Mean catchment KF-factor. Producer Defined 0 Inf inches per hour Bmh Catchment area burned at moderate or high severity. Producer Defined 0.0 Inf Square kilometers Relief Vertical relief Producer Defined 0 Inf Area Total catchment area Producer Defined 0 Inf Square kilometers BurnRatio The proportion of catchment that is burned. Producer Defined 0.0 1.0 Slope Slope Producer Defined 0 Inf Unitless (rise / run) ConfAngle Confinement angle Producer Defined 0 180 degrees DevArea Developed catchment area Producer Defined 0.0 1 Square kilometers I15_35-simulation_index.shp Attribute Table Table containing attribute information for runout polygons associated with a design storm with a 15-minute rainfall intensity of 35 mm/hr. Producer Defined I15 The peak 15-minute rainfall intensity used as a design storm. Producer Defined 0 Inf mm/hr dfsi_thr Debris-flow simulation index (dfsi) threshold Producer Defined 0.0 1.0 All attributes are defined by the PWFDF-R data specification. https://doi.org/10.5066/P15CKL9J U.S. Geological Survey - ScienceBase mailing address

Denver Federal Center

Building 810

Mail Stop 302

Denver CO 80225 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/P13GYER5 None 20260209 U.S. Geological Survey, Landslide Hazards Program GHSC Data Steward GHSC Data Steward mailing and physical

1711 Illinois St

Golden CO 80401 US 3032738500 ghsc_metadata@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998