FLORIDA GEOLOGICAL SURVEY


flood flows, and relatively stable flows during medium and low-water
periods.
 The average flow from the entire Perdido River basin is estimated to
be 1,730 cfs. About one-fourth of this, or 440 cfs, is derived from the
area lying within Escambia County.

 800



 700
a Drainage area: 237 sq. mi.
 Z Average flow: 534 cfs.
0 -

 600


 S ~ \ LOW-FLOW FREQUENCY
5I". Example: For a 20 year recurrence
S500 interval the I-day minimum
 u I \ flow is 160 cfs and the 12-
 month minimum flow is
 S 310 cfs.
o 400



t 3001 12 Month


 4 Month
 200 2 Month
 SI Month
 I Day
 toolI

 10.01 1.05 1.1 1.5 2 3 4 6 8 10 20 30 40 50
 RECURRENCE INTERVAL, IN YEARS

 Figure 21. Low-flow frequency curves for Perdido River at Barrineau Park, 1941-61.

 Brushy Creek, entering the Perdido River 13 miles above Barrineau
 Park, drains 75 square miles-53 square miles in the extreme northwest
 corner of Florida and 22 square miles in southern Alabama. At the gaging
 station near Walnut Hill, the long-term computed average flow was 95
 cfs from the drainage area of 49 square miles. The average flow from the
 entire basin is estimated to be 140 cfs, of which about 100 cfs comes
 from Escambia County and about 40 cfs from southern Alabama. The 4
 years of streamflow records on Brushy Creek were adjusted to long-term