68 REPORT OF INVESTIGATIONS No. 50
160
140
0
FO PR( FTOA
z
W 120
0
~TIME WHEN CENTERB0ARD WAS N0T IN LACE
W
100
ILJ
U
FOR PART OF TOTAL
TIME WHEN CENTOARERBOARD zWAS NOT IN PLACE
U.'A
40
0 WAS IN PLACE
oOI 005OI 02 o5I 2 5 10 20 30 0 50 60 70 80 90 95
PERCENT OF TIME DISCHARGE EQUALED OR EXCEEDED THAT SHOWN
Figure 31. Estimated flow-duration curves for Howell Creek near Maitland.
Wekiva River
The Wekiva River and its tributaries, the Little Wekiva River and Rock Springs Run, drain about 130 square miles in Orange County. Altitudes in this basin range from about 15 feet at the northern county line to about 195 feet near Windermere. Figure 32 shows profiles along the beds of streams in the Wekiva basin.
The area near the stream channels is flat and swampy, and ranges in altitude from about 15 to 30 feet. From the edges of these flat swamps, rolling hills rise abruptly to altitudes ranging between 60 and 100 feet. More than half of the Wekiva River basin in Orange County consists of rolling hills interspersed with lakes and sinks. There is no surface outflow from this area.
Records of the daily stage and discharge of the Wekiva River near Sanford (station 46) have been collected since October 1935. The topographic drainage area at this station is about 200 square miles. The average discharge for the period 1935-63 was 276 cfs.