Data release for mean annual runoff and annual runoff variability map for Oklahoma, 1940–2007

Publication Date

2021-11-10

Start Date

1940-01-01

End Date

2007-09-30

Smith, S.J., and Sherrod, E.M., 2021, Data release for mean annual runoff and annual runoff variability map for Oklahoma, 1940–2007: U.S. Geological Survey data release, https://doi.org/10.5066/P9SG5ZDO.

Type: Related Primary Publication

The Oklahoma Water Resources Board (OWRB) uses computations of mean annual runoff, mean annual streamflow, or nearby streamgage measurements to estimate the amount of surface water available for allocation. Among other resources, the OWRB has used a 1:7,500,000-scale U.S. map of mean annual runoff for the period 1951–80 (Gebert and others, 1987) to estimate the amount of surface water available for allocation. Gebert and others (1987) is the most recent in a series of contour maps of mean annual runoff for the United States that includes Langbein (1949) for the period 1921–45 and Busby (1966) for the period 1931–60, among others. Hydrologic records used to create previously published maps depicting mean annual runoff are biased to a relatively dry period in Oklahoma history that was dominated by droughts. USGS Scientific Investigations Map 3482 (Smith and Sherrod, 2021) contains an updated map of mean annual runoff and annual runoff variability. The updated map, which was based on mean-annual-streamflow regression equations developed from available streamgage data through 2007 as summarized by Lewis and Esralew (2009), was assumed to be representative of the long-term mean annual runoff conditions. The USGS, in cooperation with the OWRB, produced this data release that includes vector and raster geographic information systems (GIS) layers used in the analysis and publication of Smith and Sherrod (2021). The data release covers all 69 8-digit hydrologic units (HUC8s) with at least 1 square mile of area in Oklahoma; those HUC8s contain 2,870 12-digit hydrologic units (HUC12s) that provided the geographic framework for the analysis described in Smith and Sherrod (2021).

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• USGS Data Release Products
• USGS Oklahoma-Texas Water Science Center