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Statistical daily streamflow estimates at HUC12 outlets in the conterminous United States, Water Years 1981-2017

Metadata Updated: October 29, 2023

This data release contains daily time series estimates of natural streamflow at the outlets of more than 80,000 12-digit hydrologic units in 19 study regions across the conterminous U.S. from October 1, 1980 through September 30, 2017, using three statistical techniques: Nearest-Neighbor Drainage Area Ratio (NNDAR), Map-Correlation Drainage Area Ratio (MCDAR), and Ordinary Kriging of the logarithms of discharge per unit area (OKDAR). Location information and drainage areas for index gages were obtained from the "Reference" gages of the GAGES-II dataset (Falcone, 2011,; location information and drainage areas for the HUC12 outlets were derived from attributes of the NHDPlus Version 2.1 (Price, 2016; Wieczorek and others, 2018). Daily streamflow data for index gages were retrieved from the National Water Information System (NWIS) on September 7, 2018. NNDAR and MCDAR estimates were computed following methods described by Farmer and others (2014). OKDAR estimates were computed using pooled variograms for each study region following methods described by Farmer (2016). The three sets of streamflow estimates represent expected natural streamflow conditions with minimal disturbance by human activities, in other words, without the effects of regulation, diversion, mining, or other anthropogenic activities.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Geological Survey
Identifier USGS:5ba90650e4b08583a5ca03b0
Data Last Modified 20200814
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id f2775176-d0e1-4969-88ca-778325579840
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -125.59570312358,24.166402900476,-65.478515625979,49.353470715064
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash e7baa4fa8695abe791b6ee805de549232fdfea3d04fcb35822287fddf443acee
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -125.59570312358, 24.166402900476, -125.59570312358, 49.353470715064, -65.478515625979, 49.353470715064, -65.478515625979, 24.166402900476, -125.59570312358, 24.166402900476}

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