WATER RESOURCES OF ORANGE COUNTY 35
70
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60
z .Normal z 51.37 in.
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Figure 10. Annual rainfall at Orlando.
is released to the streams. There is some indication that this storage effect carries over into November.
In a given year the distribution of flow for a particular station may differ markedly from that representing average conditions. Contrasting distributions of flow for Econlockhatchee River are shown in figure 12 for 2 years in which total runoff was about the same.
PRESENTATION OF DATA
The data used for this report were obtained during the period October 1935 to September 1963. If the physical conditions in the basin remain unaltered and no drastic changes in the climate take place, values for the next 28 years should be very similar to those for this period. The 28-year moving average of annual rainfall at Orlando beginning in 1893 has varied from the 71-year average by no more than 3.8 percent, indicating that conditions during