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Article

Evaluation of Uncertainty Intervals for Daily, Statistically Derived Streamflow Estimates at Ungaged Basins across the Continental U.S.

1
U.S. Geological Survey, Mounds View, MN 55112, USA
2
U.S. Geological Survey, Lakewood, CO 80225, USA
*
Author to whom correspondence should be addressed.
Water 2020, 12(5), 1390; https://doi.org/10.3390/w12051390
Received: 3 April 2020 / Revised: 4 May 2020 / Accepted: 5 May 2020 / Published: 14 May 2020
Streamflow estimation methods that transfer information from an index gage to an ungauged site are commonly used; however, uncertainty in daily streamflow estimates are often not adequately quantified. In this study, daily streamflow was simulated at 1331 validation streamgauges across the continental United States using four transfer-based streamflow estimation methods. Empirical 95 percent uncertainty intervals were computed for estimated daily streamflows. Uncertainty intervals were evaluated for reliability, sharpness, and overall ability to accurately quantify the uncertainty inherent in the estimated daily streamflow. Uncertainty intervals performed reliably in the Eastern U.S. and Pacific Northwest regions of the country, containing a median of 96 and 99 percent of the observed values respectively. Uncertainty intervals were less reliable in the Great Plains and arid Southwest regions, where uncertainty intervals contained a median of 83 and 94 percent of the observed streamflows respectively. Uncertainty interval performance was correlated with gage density and hydrologic similarity near the validation site, as well as the aridity and baseflow indices at the site. View Full-Text
Keywords: streamflow estimation; ungaged basins; uncertainty interval; QPPQ; drainage area ratio streamflow estimation; ungaged basins; uncertainty interval; QPPQ; drainage area ratio
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MDPI and ACS Style

Levin, S.B.; Farmer, W.H. Evaluation of Uncertainty Intervals for Daily, Statistically Derived Streamflow Estimates at Ungaged Basins across the Continental U.S. Water 2020, 12, 1390. https://doi.org/10.3390/w12051390

AMA Style

Levin SB, Farmer WH. Evaluation of Uncertainty Intervals for Daily, Statistically Derived Streamflow Estimates at Ungaged Basins across the Continental U.S. Water. 2020; 12(5):1390. https://doi.org/10.3390/w12051390

Chicago/Turabian Style

Levin, Sara B.; Farmer, William H. 2020. "Evaluation of Uncertainty Intervals for Daily, Statistically Derived Streamflow Estimates at Ungaged Basins across the Continental U.S." Water 12, no. 5: 1390. https://doi.org/10.3390/w12051390

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