Alafia River Minimum Flows and Levels - Southwest Florida Water ...

Table of Figures
Figure 1-1. Building blocks developed for a building block approach to the
development of minimum flows. Blocks corresponding to low (Block 1),
medium (Block 2) and high (Block 3) flows are shown along with period of
record median daily flows for the Alafia River at Lithia gage. ......................1-8
Figure 2-1. Map of Alafia River watershed showing USGS gage site locations and
locations of Lithia and Buckhorn Springs.....................................................2-2
Figure 2-2. Average total monthly rainfall at Plant City, FL gage for period of
record 1901 to 2000.....................................................................................2-3
Figure 2-3. Conceptual hydrogeologic cross-section of the Alafia River/Lithia
Springs Area. (modified from SDI (2002))...................................................2-7
Figure 2-4. May and September 2001 observed water levels and USGS
potentiometric surface estimates (feet NGVD) in the Upper Floridan aquifer in
the vicinity of the Alafia River.....................................................................2-10
Figure 2-5. May 2001 observed water levels (feet NGVD) and depth to water
table (in feet below land surface) in the surficial aquifer in the vicinity of the
Alafia River. ...............................................................................................2-11
Figure 2-6. Average observed head difference between the surficial aquifer and
the Upper Floridan aquifer water levels (feet) in the vicinity of the Alafia River,
based on period-of-record data..................................................................2-12
Figure 2-7. Coefficent of determination (r 2 ) values between nearby well water
levels (in feet above NGVD) and discharge at Lithia Springs. ...................2-14
Figure 2-8. Coefficient of determination (r 2 ) values between nearby well water
levels (ft NGVD) and discharge at Buckhorn Springs. ...............................2-15
Figure 2-9. 1972 and 1999 Land use/cover maps of the Alafia River watershed,
Florida........................................................................................................2-19
Figure 2-10. Comparison of land use and land cover changes in the Alafia River
watershed. .................................................................................................2-20
Figure 2-11. 1972 and 1999 Land use / cover maps of the South Prong sub-basin
of the Alafia River watershed, Florida. .......................................................2-21
Figure 2-12. Comparison of land use and land cover changes in the South Prong
sub-basin of the Alafia River watershed. ...................................................2-22
Figure 2-13. 1972 and 1999 Land use / cover maps of the North Prong sub-basin
of the Alafia River watershed, Florida. .......................................................2-24
Figure 2-14. Comparison of land use and land cover changes in the North Prong
sub-basin of the Alafia River watershed. ...................................................2-25
Figure 2-15. Examples of three river flow patterns: the Southern River Pattern
(upper panel), the Northern River Pattern (center panel) and Bimodal River
Pattern (bottom panel). ..............................................................................2-30
Figure 2-16. Building blocks developed for a building block approach to the
development of minimum flows. Blocks corresponding to low (Block 1),
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