Open-File Report 82-560
Prepared In cooperation with the GEORGIA DEPARTMENT OF NATURAL RESOURCES Environmental Protection Division
Statistics of monthly minimum flows are presented for 129 streamflow stations. Low-flow frequency data provided are based on graphical or log-Pearson Type III distributions. The probable magnltude of average standard errors due to time-sampling biss is tabulated. The average standard errors were found to be similar over a wide area comprising approximately the northern two-thirds of the State. In this area, the average standard error of estimate for a low-flow statistic. with a recurrence interval of 20 years and estimated on the basis of 10 years of record, is about 17 percent. In the southern third of the State, the magnitudes of these errors were also found to be within a narrow range, but significantly greater than in the north. In this southern area, the average standard error of estimate for a low-flow statistic. with a recurrence interval of 20 years and estimated on the basis of 10 years of record, is about 40 percent.
First posted January 5, 2010
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Purpose and Scope
Cooperation and acknowledgements
Developmen t of frequency statistics
Computation of average minimum flows
Effect of length of record
Applications of monthly low-flow frequency data
Availability of information
Comparison of monthly and annual low-flow frequency statistics
Presentation of low-flow characteristics of streams