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Author
Series
U.S. Geological Survey water-supply paper volume 2254
Geological Survey water-supply paper volume 1473
Geological Survey water-supply paper volume 1473
Author
Series
U.S. Geological Survey water-supply paper volume 2365
U.S. Geological Survey open-file report volume 89-40
U.S. Geological Survey open-file report volume 89-40
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Summary
Three methods for estimating mean monthly discharge and various points on the daily mean flow-duration curve for each month (daily mean discharges that were exceeded 90, 70, 50, and 10 percent of the time each month) were developed for western Montana. A procedure for weighting two or more individual estimates to provide a minimum-variance weighted-average estimate also was developed. This report describes the estimation methods developed and their...