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Crosswalk Table Between NHDPlus V2.1 and its Accompanying Watershed Boundary Dataset Snapshot of 12-Digit Hydrologic Units


Publication Date


Moore, R.B., Johnston, C.M., and Hayes, L., 2019, Crosswalk Table Between NHDPlus V2.1 and its Accompanying WBD Snapshot of 12-Digit Hydrologic Units: U.S. Geological Survey data release,


A crosswalk table between NHDPlus version 2.1 flowlines (using the unique field COMID) and the Watershed Boundary Dataset (WBD) 12-digit-hydrologic units (HU-12) is provided for the 48 contiguous United States. The crosswalk table provides a WBD HU-12 assignment for every networked flowline in the NHDPlus. In this way, the network developed for navigation and modeling, NHDPlus, is aligned with accounting units of the WBD HU-12s to the extent possible given the assumptions that were made in creating each. A crosswalk table for NHDPlus isolated sinks was produced by a simple overlay process where the sinks were assigned HU-12 values based on their position relative to the WBD snapshot HU-12s. This table was integrated with the flowline [...]


Attached Files

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“Table linking NHDplus v2 features with HUC12s (CSV)”
6.66 MB
“Supporting Python script”
49.97 KB
“Supporting Python script”
3.38 KB
“Supporting figure”
thumbnail 137.8 KB
Original FGDC Metadata

17.4 KB
Supporting figure
Supporting figure


Spatial Services

ScienceBase WMS


  • National Water-Quality Assessment - Hydrologic Systems Team (NAWQA - HST)
  • National Water-Quality Assessment Project
  • USGS Data Release Products



Data source
Input directly

Additional Information


Type Scheme Key
DOI doi:10.5066/P9CFXHGT

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