Alafia River Minimum Flows and Levels - Southwest Florida Water ...
Alafia River Minimum Flows and Levels - Southwest Florida Water ... Alafia River Minimum Flows and Levels - Southwest Florida Water ...
First, PHABSIM model output for the spring run may not be accurate for periods when flow in the river exceeded 70 cfs at the USGS Lithia gage. During these periods, flow/stage relationships in the spring run are influenced by spring discharge and river stage or flow. Second, the extent of aquatic habitat in the Lithia Springs Major run is not great in comparison to the availability of similar habitat in the Alafia River system. Finally, based on fish and invertebrate sampling conducted for the minimum flow assessment, no uncommon, rare, threatened or endangered species were identified in the spring run. For these reasons, we did not recommend development of a short-term compliance standard based on the 5% prescribed flow reduction for Lithia Springs Main identified from our PHABSIM analyses. Habitat Gain/Loss for Each Month for Largemouth Bass Adults - Lithia Springs 0% January February March April May June July August September October November December -10% Habitat Gain/Loss -20% -30% -40% 5% Flow Reduction 10% Flow Reduction 20% Flow Reduction 30% Flow Reduction 40% Flow Reduction -50% -60% Figure 5-12. Habitat Gain/Loss for adult largemouth bass associated with modeled flow reductions of 5-40% in the Lithia Springs Major run. Similar plots for other largemouth bass life history stages and other species are included in Appendix PHABSIM. 5-18
Table 5-4. Maximum monthly percent-of-flow reductions associated with less than a 15% reduction in habitat for various life history stages or activities of several fish species in the Lithia Springs Major run. Month Percent-Of- Fish Species Life History Stage or Activity Flow Reduction January 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass adults, juveniles; Bluegill adults February 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass adults, juveniles; Bluegill adults March 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass adults, juveniles; Bluegill adults April 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass adults, juveniles; Bluegill adults, spawning May 5% Spotted sunfish adults, juveniles, fry, spawning; Bluegill adults, spawning June 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass adults, Bluegill adults, spawning July 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass adults, juveniles; Bluegill adults, spawning August 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass adults, juveniles; Bluegill adults, spawning September 5% Spotted sunfish adults, juveniles, fry, spawning; Bluegill adults, spawning October 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass adults; Bluegill adults November 5% Spotted sunfish adults, juveniles, fry, spawning; Bluegill adults December 5% Spotted sunfish adults, juveniles, fry, spawning; Bluegill adults 5-19
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Table 5-4. Maximum monthly percent-of-flow reductions associated with less than a 15%<br />
reduction in habitat for various life history stages or activities of several fish species in<br />
the Lithia Springs Major run.<br />
Month Percent-Of- Fish Species Life History Stage or Activity<br />
Flow<br />
Reduction<br />
January 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass<br />
adults, juveniles; Bluegill adults<br />
February 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass<br />
adults, juveniles; Bluegill adults<br />
March 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass<br />
adults, juveniles; Bluegill adults<br />
April 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass<br />
adults, juveniles; Bluegill adults, spawning<br />
May 5% Spotted sunfish adults, juveniles, fry, spawning; Bluegill adults,<br />
spawning<br />
June 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass<br />
adults, Bluegill adults, spawning<br />
July 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass<br />
adults, juveniles; Bluegill adults, spawning<br />
August 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass<br />
adults, juveniles; Bluegill adults, spawning<br />
September 5% Spotted sunfish adults, juveniles, fry, spawning; Bluegill adults,<br />
spawning<br />
October 5% Spotted sunfish adults, juveniles, fry, spawning; Largemouth bass<br />
adults; Bluegill adults<br />
November 5% Spotted sunfish adults, juveniles, fry, spawning; Bluegill adults<br />
December 5% Spotted sunfish adults, juveniles, fry, spawning; Bluegill adults<br />
5-19
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