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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 Reach Catchments and Modified Routed Upstream Watersheds: 30 year (1981 - 2010) annual average duration of consecutive dry and wet days for the Conterminous United States and District of Columbia

Attributes for NHDPlus Version 2.1 Reach Catchments and Modified Routed Upstream Watersheds: 30 year (1981 - 2010) annual average duration of consecutive dry and wet days for the Conterminous United States and District of Columbia

Dates

Publication Date
Start Date
1981-01-01
End Date
2010-12-31

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 describes the annual average duration of consecutive wet and dry events during the 30-year period 1981 – 2010 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. A wet event is defined as a period when the number of consecutive days with precipitation equals or exceeds 1 millimeter. A dry event is defined as a period when the number of consecutive days with precipitation equals 0 millimeters. This dataset can be linked to the NHDPlus version 2 data suite by the unique identifier COMID. The source data for 30 year (1981-2010) annual average duration of consecutive [...]

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_CDD_CWD_Average_Duration.xml
Original FGDC Metadata
View 		29.25 KB application/fgdc+xml
DryEvent.csv 109.76 MB text/csv
WetEvent.csv 109.38 MB text/csv
63978f0ad34e0de3a1f065d1_acc.parquet 19.34 MB application/octet-stream
63978f0ad34e0de3a1f065d1_cat.parquet 19.34 MB application/octet-stream
63978f0ad34e0de3a1f065d1_tot.parquet 19.32 MB application/octet-stream

Purpose

The spatial variability of 30 year (1981 - 2010) annual average duration of consecutive dry and wet days is an important component with respect to water resources and hydrologic studies. This effort was undertaken to estimate the 30 year (1981 - 2010) annual average duration of consecutive dry and wet days 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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