Geospatial Fabric for the National Hydrologic Model Alaska Domain, version 1
Dates
Publication Date
2020-06-04
Time Period
2019-12-30
Citation
Barnhart, T.B., Sexstone, G.A., Hammond, J.C., Driscoll, J.M., Foks, S.S., and LaMotte, A.E., 2020, Geospatial Fabric for the National Hydrologic Model Alaska Domain, version 1: U.S. Geological Survey data release, https://doi.org/10.5066/P9ZXTW4W.
Summary
This data release contains a geospatial dataset for the U.S. Geological Survey Precipitation Runoff Modeling System (PRMS) used to drive the National Hydrologic Model (NHM). The Alaska Geospatial Fabric v1 is the spatial representation of the hydrologic response units (HRUs) used for the PRMS NHM Alaska domain. These HRUs were generated using the twelve-digit Hydrologic Unit Code (HUC12) watershed from the U.S. Geological Survey's Watershed Boundary Dataset (USGS, 2019), the Natural Resources Canada National Hydrographic Network (NHN) Work Units (NHN, 2019), similar to USGS eight-digit HUC watersheds, and stream gage locations from the U.S. Geological Survey (USGS, 2019) and Natural Resources Canada (NHN, 2019). Watershed-to-watershed [...]
Summary
This data release contains a geospatial dataset for the U.S. Geological Survey Precipitation Runoff Modeling System (PRMS) used to drive the National Hydrologic Model (NHM). The Alaska Geospatial Fabric v1 is the spatial representation of the hydrologic response units (HRUs) used for the PRMS NHM Alaska domain. These HRUs were generated using the twelve-digit Hydrologic Unit Code (HUC12) watershed from the U.S. Geological Survey's Watershed Boundary Dataset (USGS, 2019), the Natural Resources Canada National Hydrographic Network (NHN) Work Units (NHN, 2019), similar to USGS eight-digit HUC watersheds, and stream gage locations from the U.S. Geological Survey (USGS, 2019) and Natural Resources Canada (NHN, 2019). Watershed-to-watershed routing was added to all Canadian Work Units and updated in twelve-digit HUCs from topographic map examination to ensure connectivity from the headwaters of the domain to the ocean. Watersheds containing one or more stream gages were bisected using standard watershed delineation techniques to ensure accurate contributing area for each gage. Gages near watershed boundaries were not used to bisect the watershed. Following these processing steps, these watersheds became the HRUs used for the initial version of the National Hydrologic Model Alaska Domain. Overlapping watershed vector lines were not unified. The stream gages used for this exercise became the points of interest (POIs) for use in the Alaska Domain. Stream segments used to route water from HRUs to stream outlets were generated using the routing information in the HRUs and the centroids of the HRUs. Please refer to the lineage elements of this metadata record for the above citations.
U.S. Geological Survey, 2019, USGS National Watershed Boundary Dataset, ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Hydrography/WBD/
Environment Canada, 2016, Natural Resources Canada National Hydro Network (NHN) Work Units, https://www.nrcan.gc.ca/science-data/science-research/earth-sciences/geography/topographic-information/geobase-surface-water-program-ge/watershed-boundaries/20973
Click on title to download individual files attached to this item.
AKGF_v1_metadata.xml “metadata FGDC CSDGM” Original FGDC Metadata
View
22.91 KB
application/fgdc+xml
AKGF_v1.gdb.zip “Alaska Geospatial Fabric version 1”
66.28 MB
application/zip
Purpose
These data are used to define the geographic extent of each hydrologic response unit to generate model parameters related to the landscape, e.g. mean elevation, dominant land cover type, vegetation density, etc. The routing information contained in the HRUs and stream segments was used to parameterize stream routing for the Alaska domain in the National Hydrologic Model.
