Multiyear low flow in southeastern Kansas

Many existing water supplies in southeastern Kansas are proving inadequate to meet current and expanded future needs. One of the methods in which the use of highly variable streamflow in the area can be evaluated is with the aid of multiyear low-flow frequency information. Data from 19 stream-gaging stations in the study area and a base period of 1940-77 were used to develop maps from which discharge values for the 2- and 50-year recurrence interval for durations of 12, 24, 36, and 60 months can be obtained for ungaged sites that have drainage areas of less than 1,000 square miles. Discharge values for intervening recurrence intervals can be obtained by interpolation. Extrapolation of regionalized values in this report to drainage areas smaller than 110 square miles and larger than 1,000 square miles has not been validated.