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Low-flow characteristics of Alabama streams

Water Supply Paper 2083

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Abstract

A new procedure for estimating the 7-day, 2-year and the 7-day, 10-year low flow of ungaged Alabama streams is based on geology, drainage area, and mean annual precipitation. One equation for each of the two low-flow frequencies applies statewide to all natural flow streams; the equations do not apply to streams where flow is significantly altered by activities of man. The standard error of estimate of each equation based on map values is 40 percent for 7-day, 2-year low flow and 44 percent for 7-day, 10-year low flow. The rate of streamflow recession is used to account for the effects of geology on low flow. Streamflow recession rate depends primarily on transmissivity and storage characteristics of the aquifers, and average distance from stream channels to divides. Relations of low-flow discharge to geology, drainage area, and mean annual precipitation were analyzed by multiple regression techniques.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Low-flow characteristics of Alabama streams
Series title:
Water Supply Paper
Series number:
2083
Edition:
-
Year Published:
1982
Language:
ENGLISH
Publisher:
U.S. G.P.O.,
Description:
iii, 27 p., [2] fold. leaves of plates (in pocket) :ill. ;23 cm.