ABSTRACT

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