digitizer). A total of 751 ponds in Hendry County and 192

ponds in Collier County was used to estimate average pond

size. Lee County ponds were assumed to be similar. Ponds

were counted on the sample 9" x 9" aerial photographs, and

calculations of ponds per mile from the 9" x 9" aerial

photographs were compared with those from the same general

areas on the index sheet to test the accuracy of the

original count. A small correction factor thus developed

was applied to the total count for the counties. Figure 13

shows a sample aerial photograph with ponds outlined.

 Pond area was subtracted from other wetlands types to

avoid double-counting. The area of ponds in each ecosystem

was approximated from observations made during the count.

The estimated percentage of pond area in each ecosystem is

given at the bottom of the tables describing wetlands area

for each county in Appendix A. Histograms showing the size

frequency distribution of ponds in Hendry and Collier

Counties were prepared.

 Maximum capacities of the sample ponds were estimated

by the equation for the volume of a cone. Total capacity

of the sample ponds was multiplied by the total number of

ponds and divided by the number of sample ponds to obtain

the total volume of water the ponds of the two counties

could hold. The total capacity of ponds in Lee County was

estimated as the product of total number of ponds in Lee

County and the average size of ponds in Hendry and Lee

counties.