Lake Okeechobee
....Watershed is dominated by agricultural land uses that account for 51.2 percent of the total area
(1.7 million acres); followed by natural areas including wetlands, upland forests, and water
bodies (35.7 percent or 1.2 million acres); and urban areas (11.9 percent or ~410,000 acres), the
majority of which lie within the Upper Kissimmee and Lake Istokpoga sub-watersheds
..... Although dairy farms in the northern basins cover less than
1 percent of the land use area, they represent a considerable source of phosphorus to some
tributaries and up to 5 percent of the total external loading to the lake (Bottcher 2006)...
Section 1: Introduction 1
1.1 Document Purpose ........................................................................................... 1
1.2 Physical Description of Lake Okeechobee ......................................................... 3
1.3 Land Use .......................................................................................................... 3
1.4 Lake Okeechobee Sub-Watersheds .................................................................. 6
Section 2: Overview of Lake Okeechobee Watershed Protection Programs 11
2.1 Lake Okeechobee Protection Plan .................................................................. 13
2.2 Lake Okeechobee Watershed Construction Project ........................................ 13
2.2.1 Phase I ............................................................................................... 13
2.2.2 Phase II Technical Plan ......................................................................... 13
2.3 Lake Okeechobee Watershed Phosphorus Control Program ........................... 14
2.3.1 FDACS Agricultural Programs ................................................................. 15
2.3.2 FDEP Agricultural Programs ................................................................... 15
2.3.3 FDEP Non-Agricultural Programs ............................................................ 16
2.3.4 SFWMD Source Control Programs ........................................................... 16
2.4 Lake Okeechobee Research and Water Quality Monitoring Program .............. 17
2.5 Exotic Species Control Program ..................................................................... 18
2.6 Internal Phosphorus Management Program ................................................... 18
Section 3: Current Status of Lake Okeechobee 21
3.1 Ecological Status ............................................................................................ 21
3.1.1 Water Levels ....................................................................................... 21
3.1.2 Nearshore Phosphorus and Turbidity Levels ............................................. 22
3.1.3 Algal Blooms ....................................................................................... 23
3.1.4 Littoral Vegetation ............................................................................... 24
3.1.5 Control of Exotic Vegetation .................................................................. 28
3.1.6 Benthic Invertebrate Communities ......................................................... 29
3.1.7 Amphibian and Reptile Communities ....................................................... 31
3.1.8 Fish Communities ................................................................................ 32
3.2 Current Water Quality Trends (2001-2009) ................................................... 34
3.2.1 Lake Phosphorus Reduction Goal ............................................................ 34
3.2.2 Tributary Nutrient Loading Trends .......................................................... 34
3.2.3 Inflow Phosphorus Loading Trends and In-Lake Phosphorus Concentrations .. 44
3.2.4 Lake Discharge Phosphorus Trends ......................................................... 47
Section 4: Challenges in the Watershed 51
4.1 Backgound ..................................................................................................... 51
4.2 Legacy Phosphorus ........................................................................................ 51
4.3 Annual Nutrient Imports ................................................................................ 53
4.4 In-Lake Phosphorus Loading .......................................................................... 58
4.5 Stormwater Treatment Areas in the Northern Everglades .....
http://www.sfwmd.gov/portal/page/portal/xrepository/sfwmd_repository_pdf/lopp_update_2011.pdf