Table 3-2 Mean flow requirement at the USGS Alafia River near Lithia gage needed to inundate
floodplain features, and percent of flow reductions associated with no more than a
15% reduction in the number of days that the required flows are equaled or exceeded
for two benchmark periods (1940 through 1969 and 1970 through 1999).
Floodplain Feature Identified for
Development of Minimum Flows and
Levels for the Alafia River
Mean (SD)
Flow
Requirements
(m3/S)
Percent-of-
Flow
Reduction
from 1940
through 1969
Percent-of-Flow
Reduction from
1970 through
1999
Low bank elevation
Low bank elevation for inundation of
both sides of river floodplain
Highest floodplain vegetation class
Mean elevation of swamp classes
Highest swamp class
Floodplain wetted perimeter inflection
pomnt
Mean elevation of hydric soils
Highest elevation of hydric soils
33 (17)
64 (18)
101 (9)
28 (12)
42 (22)
22 (8)
29 (11)
58 (36)