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Helen Light U.S. Geological Survey

Hydrology, Topography, and Soils of Lower Suwannee River Floodplain Forests and Ecological Consequences of Potential Flow Reductions. Helen Light U.S. Geological Survey. Study Area. N. W. i. t. h. l. a. A. c. o. A. o. t. l. c. a. l. h. p. e. a. a. e. h. a. n. R. t.

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Helen Light U.S. Geological Survey

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  1. Hydrology, Topography, and Soilsof Lower Suwannee River Floodplain Forests andEcological Consequences of Potential Flow Reductions Helen Light U.S. Geological Survey

  2. Study Area N W i t h l a A c o A o t l c a l h p e a a e h a n R t i v i e r R c i v e r O R i c v e r e e e a n n a n w u S F e S a R n i v e t r a Gulf of Mexico

  3. N Riverine Upper Tidal Lower Tidal Study Area N W i t h l a A c o A o t l c a l h p e a a e h a n R t i v i e r R c i v e r O R i c v e r e e e a n n a n w u S F e S a R n i v e t r a Gulf of Mexico

  4. N RIVER HYDROLOGY TOPOGRAPHY SOILS Riverine FLOODPLAIN HYDROLOGY FOREST FOREST COMPOSITION DISTRIBUTION Upper Tidal FLOW-DEPENDENT FACTORS Lower Tidal IMPACTS OF FLOW REDUCTIONS Goals

  5. N Riverine Upper Tidal Lower Tidal Hydrology Topography Soils

  6. N Riverine Upper Tidal Lower Tidal Topography Range 11 feet Levees & ridges prominent Range 3 feet Levees minor or absent Hummocks common Tidal creeks common

  7. N Riverine Upper Tidal Lower Tidal Soils Mineral soils Saturated muck Saturated muck Saline

  8. N Riverine Upper Tidal Lower Tidal Floodplain Inundation

  9. N Riverine Upper Tidal Lower Tidal Floodplain Inundation Flow dependent at all flows Flow dependent at high flows Little or no relation to flow

  10. N RIVER HYDROLOGY TOPOGRAPHY SOILS Riverine FLOODPLAIN HYDROLOGY FOREST FOREST COMPOSITION DISTRIBUTION Upper Tidal FLOW-DEPENDENT FACTORS Lower Tidal IMPACTS OF FLOW REDUCTIONS Goals

  11. N Riverine Upper Tidal Lower Tidal Flow Dependent Factors Flood depths Inundation Saturation Flood depths Inundation Salinity

  12. Flood depths affects composition by limiting seedling survival

  13. Floodplain Cross Section High water

  14. Aquatic habitat in floodplain is flow dependent

  15. Inundated Area in Relation to Flow(Riverine)

  16. Loss of Forests at Tree Line OPEN WATER HAMMOCK MARSHES AQUATIC BEDS SWAMP SWAMPS REPLACED BY MARSH

  17. Forest composition changes: Exotic species Opportunistic species Human disturbance Lower quality of BLH Fewer wet swamps Forest mortality at tree line Ecological Consequences of Flow Reductions

  18. Decreased inundation and saturation: Aquatic habitat for fishes & invertebrates Nutrient and detritus transport Nitrate removal Water retention during droughts Vulnerability to fire Ecological Consequences of Flow Reductions

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