Paul A. Ensminger 20250515 raster digital data Reston, VA U.S. Geological Survey https://doi.org/10.5066/P9TV9MZC The U.S. Geological Survey (USGS), in cooperation with the Louisiana Department of Transportation, prepared hydro-conditioned geographic information systems (GIS) layers for use in the Louisiana StreamStats application. These data were used within peak flow and low flow regression equations for Louisiana. This dataset consists of flow direction rasters for each 8-digit Hydrologic Unit Code (HUC) area in Louisiana, one of the layer types needed to delineate watersheds within the HUC-8 areas, merged into a single dataset. The 54 HUCs represented by this dataset are 03180004, 03180005, 08030100, 08040202, 08040205, 08040206, 08040207, 08040301, 08040302, 08040303, 08040304, 08040305, 08040306, 08050001, 08050002, 08050003, 08060100, 08070100, 08070201, 08070202, 08070203, 08070204, 08070205, 08070300, 08080101, 08080102, 08080103, 08080201, 08080202, 08080203, 08080204, 08080205, 08080206, 08090100, 08090201, 08090202, 08090203, 08090301, 08090302, 11140201, 11140202, 11140203, 11140204, 11140205, 11140206, 11140207, 11140208, 11140209, 11140304, 11140306, 12010002, 12010004, 12010005, and 12040201. Data were obtained in order to support the U.S. Geological Survey (USGS) for basin delineation database in Louisiana, and for incorporation into the Louisiana StreamStats application. These data were developed as part of a USGS study, done in cooperation with the Louisiana Department of Transportation, to delineate drainage areas for user-selected locations on streams, and then determine basin characteristics and estimates of flow statistics for the selected locations within the Louisiana StreamStats application. 20190306 publication date Complete None planned -96.1468 -86.9853 34.2678 28.7880 ISO 19115 Topic Category elevation inlandWaters environment geoscientificInformation USGS Thesaurus Digital Elevation Models DEM Topography streamflow hydrology geospatial datasets geospatial analysis water resources Geographic Information System GIS USGS Metadata Identifier USGS:631f82cfd34e71c6d67a6d94 None flow direction hydrologically conditioned hydrologically enforced stream delineation Geographic Names Information Systems (GNIS) Louisiana United States None Although these data have been used by the U.S. Geological Survey (USGS), U.S. Department of the Interior, no warranty expressed or implied is made by the USGS as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This dataset may be redistributed if it is not edited and is properly referenced. Although USGS intends to make this server available 24 hours a day, seven days a week, timely delivery of data and products from this server through the Internet is not guaranteed. Paul A Ensminger U.S. Geological Survey, Southeast Region Hydrologist mailing address

3535 S Sherwood Forest

Baton Rouge LA 70816 US 225-298-5481 225-298-5490 paensmin@usgs.gov Compilation of this data set and the associated metadata was done in cooperation Louisianan Department of Transportation No formal attribute accuracy tests were conducted No formal logical accuracy tests were conducted 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. No formal positional accuracy tests were conducted No formal positional accuracy tests were conducted U.S. Geological Survey, National Geospatial Program 20190701 vector digital data, tabular digital data Reston, VA U.S. Geological Survey (USGS) http://nhd.usgs.gov/wbd.html https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Hydrography/ https://www.usgs.gov/national-hydrography https://www.usgs.gov/the-national-map-data-delivery online 20190321 Download Date NHD Spatial and attribute data from NHDArea, NHDWaterbody, NHDFlowline, WBDHU12 and WBDHU8 feature classes U.S. Geological Survey 20181025 raster digital data Reston, VA U.S. Geological Survey https://nationalmap.gov/elevation.html http://nationalmap.gov/viewer.html. https://apps.nationalmap.gov/downloader/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/13/ https://www.usgs.gov/tools/download-data-maps-national-map online 20160101 20161231 Download Date NED source data The data layers were processed using the StreamStats toolbox scripts and ArcHydro. Beginning with the NHD and NED data for Louisiana, the elevation raster was projected to NAD 1983 Albers with pixel size of 10m. The NHD Flowline data were edited to create a dendrite stream network. Flow direction and flow accumulation rasters were created using the HydroDEM.aml and Agree.aml scripts. Watershed catchment, adjoint catchment, longest flow path, and sink processing was done using ArcHydro. Digital Elevation Model National Elevation Dataset 20211110 La_fdt.tif Raster Pixel 58990 65514 NAD 1983 Albers 29.5 45.5 -96.0 23.0 0.0 0.0 row and column 10 10 meters D North American 1983 GRS 1980 6378137.0 298.257222101 LA_fdr.tif Raster geospatial data file that defines stream networks using flow directon information Producer Defined OID Internal object identifier. Producer Defined Sequential unique whole numbers that are automatically generated. VALUE Producer Defined 1 128 COUNT Producer Defined 153275259 321197188 GS ScienceBase U.S. Geological Survey mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

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/P934094M No fees are applicable for obtaining the data set. This zip file contains data available in TIFF format. The user must have software capable of uncompressing the WinZip file and displaying the raster. 20250515 Paul A Ensminger U.S. Geological Survey, Southeast Region Hydrologist mailing address

3535 S Sherwood Forest

Baton Rouge LA 70816 US 225-298-5481 225-298-5490 paensmin@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time