Low-flow characteristics of streams in the Menominee-Oconto-Peshtigo River basin, Wisconsin

Abstract

The purpose of this report is to describe low-flow characteristics of streams in the Menominee-Oconto-Peshtigo River basin where streamflow data have been collected and to present equations for estimating low-flow characteristics at ungaged sites. Included are estimates of low-flow frequency at 12 gaging stations, flow duration at 10 gaging stations, and low-flow frequency characteristics at 37 low-flow partial-record stations and 127 miscellaneous sites. Four equations are provided to estimate low-flow characteristics at ungaged sites and at sites where one base-flow discharge measurement is available. The low-flow characteristics determined are the annual minimum 7-day mean flow below -/ which the flow will fall on an average of once in 2 years (0,7,2) an<^ once in 10 years (Qy IQ)* ^e equations were determined from multiple-regression analyses that related the low-flow characteristics at gaging stations and low-flow partialrecord stations to basin characteristics. Drainage area (A), slope (S), and transmissivity (T) were the most significant characteristics in explaining the variations in low flow for ungaged sites. The equations and standard error of estimates (SE) for ungaged sites are: 0, = 9.ltoO-5A0 8^S°862T0 532 SEY 9 60 percent