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Updated CONUS river network attributes based on the E2NHDPlusV2 and NWMv2.1 networks (ver. 2.0, February 2023)


Publication Date


Blodgett, D.L., 2023, Updated CONUS river network attributes based on the E2NHDPlusV2 and NWMv2.1 networks (ver. 2.0, February 2023): U.S. Geological Survey data release,


The comid field of these data can be used to join to the NHDPlus version 2 flowline comid or catchment featureid attributes. The included attributes follow the same data model as the NHDPlusV2 but include numerous updates and improvements to network connectivity. All attributes that depend on network connectivity have been recalculated. These attributes are based on the National Hydrography Dataset Plus V2.1 (NHDPlusV2) network geometry and modifications retrieved from the National Water Model V2.1 (NWMv2.1) and "E2NHDPlusV2_us: Database of Ancillary Hydrologic Attributes and Modified Routing for NHDPlus Version 2.1 Flowlines" (E2NHDPlusV2) datasets. These attributes are available in three formats: csv, fst, and parquet. "fst" is [...]


Originator :
David L Blodgett
Point of Contact :
David L Blodgett
Metadata Contact :
David L Blodgett
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Integrated Modeling & Prediction Division
USGS Mission Area :
Water Resources

Attached Files

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enhd_nhdplusatts.csv 489.49 MB text/csv
enhd_nhdplusatts.fst 322.41 MB image/vnd.fst
enhd_nhdplusatts.parquet 161.92 MB application/unknown
enhd_nhdplusatts_version_history.txt 1.14 KB text/plain


These data are part of a broader reference hydrologic geospatial fabric being developed in support of national integrated hydrologic modelling and data integration.



  • USGS Data Release Products

Associated Items



Revision 2.0 by Dave Blodgett on February 1, 2023. To review the changes that were made, see “enhd_nhdplusatts_version_history.txt” in the attached files section. A bug in a data procesing workflow was fixed. The code in question was not applying all diversion changes from the E2NHDPlusV2 dataset. The change results in many of the diversion alterations from the E2NHDPlusV2 dataset being included and, as a result, many of the derived network attributes have changed. This change has no structural or functional impact on the dataset. However, primary paths downstream through diversions and upstream through confluences have been altered in many places.

Additional Information


Type Scheme Key
DOI doi:10.5066/P976XCVT

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