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Attribution of benthic macroinvertebrate and fish sampling data to NHDPlusV2 Catchments within the Chesapeake Bay Watershed (ver. 2.0, March 2022)


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Krause, K.P., Walker, R.H., Gressler, B.P., Young, J.A., and Maloney, K.O., 2021, Attribution of benthic macroinvertebrate and fish sampling data to NHDPlusV2 Catchments within the Chesapeake Bay Watershed (ver. 2.0, March 2022): U.S. Geological Survey data release,


This data release links fish survey data from a suite of programs in the Chesapeake Bay watershed as well the benthic macroinvertebrate sites included in the Chesapeake Bay Basin-wide Index of Biotic Integrity (Chessie BIBI) developed by the Interstate Commission on the Potomac River Basin (ICPRB) and available from the Chesapeake Bay Program ( The data set contains site name, survey program, coordinates of sample, and ancillary information such as sample date and site location information where available. It also includes the NHDPlus V2.1 unique identifier, COMID, as well as a confidence classification category for each of these assignments based on a set of pre-determined rules. [...]


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4.43 MB text/csv
“Data Dictionary”
9.56 KB text/csv
“Confidence Dictionary”
3.46 KB text/csv
3.73 MB text/csv
USGS_Revision History.txt
“Version History”
1.91 KB text/plain
“Independent Validation Test Details”
28.25 KB application/vnd.openxmlformats-officedocument.wordprocessingml.document


Benthic macroinvertebrate (Chessie BIBI) and fish sampling data points were assigned to NHDPlusV2 catchments to enhance the spatial accuracy of various geospatial landscape data that would be summarized to NHD catchments and attributed to represent the local and upstream landscape influencing the sampling data. This is useful for a variety of landscape ecology approaches. This assignment is more appropriate than an intersection of sampling points and NHD catchments via coordinates alone for a variety of reasons including sampling points representing flowlines that are not present in the NHD 1:100,000 representation of the hydrologic network, geospatial mismatches in how the NHD flowlines and catchments represent hydrologic features on the landscape, and uncertainties in the spatial resolution and accuracy of sampling point coordinates.



  • Eastern Ecological Science Center
  • USGS Data Release Products



Revision 2.0 by Kevin P. Krause on March 10, 2022. To review the changes that were made, see “USGS_Revision History.txt” in the attached files section.

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DOI doi:10.5066/P9C1PX4P

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