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  4. Select Attributes for NHDPlus Version 2.1 Reach Catchments and Modified Network Routed Upstream Watersheds for the Conterminous United States (ver. 4.0, August 2023)
  5. Select Climate Attributes for NHDPlus Version 2.1 Reach Catchments and Modified Network Routed Upstream Watersheds for the Conterminous United States
  6. Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Mean Julian Day of the Year of First Freeze, from 30 Years of Record (1961-1990)

Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Mean Julian Day of the Year of First Freeze, from 30 Years of Record (1961-1990)

Dates

Publication Date
Start Date
1961
End Date
1990

Citation

Wieczorek, M.E., Jackson, S.E., and Schwarz, G.E., 2018, Select Attributes for NHDPlus Version 2.1 Reach Catchments and Modified Network Routed Upstream Watersheds for the Conterminous United States (ver. 4.0, August 2023): U.S. Geological Survey data release, https://doi.org/10.5066/F7765D7V.

Summary

This tabular data set represents the mean Julian year day of the year of the first freeze, from 30 years of record (1961-1990) compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for the conterminous United States; 1) individual reach catchments and 2) reach catchments accumulated upstream through the river network. This dataset can be linked to the NHDPlus version 2 data suite by the unique identifier COMID. The source data for the mean day of the year of a first freeze, from 30 years of Record (1961-1990) was provided by the Environmental Protection Agency and is included with this data set (Ryan Hill, EPA, written commun., 2006). Values of 0 indicate there is no freeze. Reach catchment information [...]

Contacts

Point of Contact :
Michael E Wieczorek, Maryland-Delaware-D.C. Water Science Center
Originator :
Michael E Wieczorek, Shannon E Jackson, Gregory E Schwarz
Metadata Contact :
Michael E Wieczorek
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Water Resources
SDC Data Owner :
Maryland-Delaware-D.C. Water Science Center

Attached Files

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NHDV2_FSTFZ6190_CONUS.xml
Original FGDC Metadata
View 		21.26 KB application/fgdc+xml
FSTFZ6190_CONUS.zip 18.41 MB application/zip
fstfz.zip 721.21 KB application/zip
5704052ae4b0328dcb827bc7_acc.parquet 15.4 MB application/octet-stream
5704052ae4b0328dcb827bc7_cat.parquet 15.04 MB application/octet-stream
5704052ae4b0328dcb827bc7_tot.parquet 15.41 MB application/octet-stream

Purpose

This data set was created by the U.S. Geological Survey's (USGS) National Water-Quality Assessment Project (NAWQA) which is part of the USGS National Water Quality Program (NWQP). This effort was undertaken to estimate the mean Julian day of the year of Last freeze, from 30 years of Record (1961-1990) for NHDPlusV2 flowline catchments and upstream river networks to support statistical analysis, map display, and model parameterization.

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Communities

  • USGS Maryland, Delaware, and the District of Columbia Water Science Center

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