WATER RESOURCES OF ORANGE COUNTY 37
4
ECONLOCKHATCHEE RIVER NR. CHULUOTA
W Total 13.13 in.
o) 1958
Z2
z

0
z 2 ..
4 4
z o _ii~~~~l}}iii ::::::: !iii
Total 13.85 in.
1949
z
LL 2 .. -noZ T- < IZ il -I iiiPi1iiiiiii -1iii
Figure 12. Monthly runoff from Econlockhatchee River basin-1949 and 1958.
the period October 1935 to September 1963 are representative of the long-term average. The average for the 28-year period 1936-1963 differed from the 71-year average by only 0.01 of 1 percent. The value of this report is premised on the applicability in the future of analyses based on past record.
Surface-water data have been collected at 62 sites in the county. Data on the chemical quality of surface water have been collected at 35 of these sites since 1953. Figure 13 lists the sites where data have been collected systematically and shows the number of water samples analyzed, the types of stage and flow record collected, and the periods of record. Table 7 lists the sites where miscellaneous records have been collected.