USGS reference watershed runoff ratios for the contiguous U.S. 1981 to 2016.

Resource type: Composite Resource
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Created: Jun 14, 2017 at 9:56 p.m.
Last updated: Jun 14, 2017 at 10:06 p.m.
DOI: 10.4211/hs.97bf4dd2b3db4e799407e3e8c3e794f0
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Sharing Status: Published
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Here I provide water year discharge (Q) and precipitation (P) in units of mm as well as the water year runoff ratio (Q/P) for all reference USGS watersheds as defined by the GAGES-II project (Falcone, 2011) for water years 1981 to 2016. Precipitation values were extracted from PRISM monthly totals for the "Recent years" 4 km gridded dataset, and discharge values come from summations of USGS daily mean streamflow values. The dataset contains Q, P, and Q/P data by watershed for 1,594 reference USGS watersheds.

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Resource Level Coverage


Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
North Latitude
East Longitude
South Latitude
West Longitude


Start Date:
End Date:


How to Cite

Hammond, J. (2017). USGS reference watershed runoff ratios for the contiguous U.S. 1981 to 2016., HydroShare,

This resource is shared under the Creative Commons Attribution CC BY.


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