Agricultural and Biological Engineering SWFREC, UF/IFAS Immokalee
Shallow Area = 1,600 ac Largest lake south of Okeechobee Headwaters of Corkscrew Swamp, Imperial River
Remove muck (6 ft.) Restore native fisheries and the lake ecosystem Develop a Watershed Protection Plan to reduce nutrient inputs ◦ Re-establish SAV ◦ Long-term water quality ◦ BMPs
Land Category Area (ac)% Water Commercial and Industrial Medium density residential High density residential Low density residential Undeveloped rangeland/upland forests 1, Unimproved pasture/woodland pasture 1, Wetlands 6, Cropland/improved pasture/tree crops 6, Total 18, Uncertainties in boundary and land use area
Impaired mainly due to Nitrogen and Phosphorus TMDL assessment using HSPF model Current simulated loads ◦ Total N (TN) = 141,543 lbs./yr ◦ Total P (TP)= 14,559 lbs./yr Load reduction targets ◦ 60% TN ◦ 77% for TP Allowable loads ◦ Total N = 56,617 lbs./yr ◦ Total P= 3,348 lbs./yr FDEP (2008) Uncertainties (model, boundary)
Assumptions and uncertainties (model, area, land use)
Stakeholders, allocation/reductions mechanisms Allocations among affected parties Description of load reduction activities Timetables for implementation/completion Funding mechanisms Applicable signed agreements Local ordinances with actions to be taken or prohibited. Local water quality standards, permits, or load limitation agreements. Monitoring and follow-up measures.
Uncertainties Boundary (agriculture and urban) Inflow locations and sources Flat, significant bi-directional flows Spray field Steps LIDAR, GIS, Surface Slopes, Flow directions Drainage networks, Stakeholder’s input, Ground truthing Surface flow inputs and locations
OptionTotalFY 15FY 16Project DurationPersonnel 1a $136,000 $0Feb 2015-Jan 2017Grad Student (part time) 1b $136,000$68,000 Feb 2015-Jan 2017Grad Student (part time) 2a $148,000 $0Feb 2015-Jan 2016Post-doctoral Associate (full time) 2b$148,000$74,000 Feb 2015-June 2016Post-doctoral Associate (full time) *Current estimates, assumes fund availability by February 1, 2015
Design and implement hydrologic and water quality monitoring system Identify input locations Surface ( Channelized, Sheet flow) Groundwater Stakeholder’s meeting - verify inputs Monitoring Surface and Ground Water Levels and flows NH4-N, Nox-N, TKN, and Total P Conc Quantify surface and groundwater inflows and outflows of water and nutrients
Budgets for the lake and the watershed using ( ) data Water: Rainfall, Irrigation, ET, inflows, outflows Nutrient: Fertilizer, wastewater, other inflows and outflows Stakeholder’s meeting, input estimates Linkages of budget - land use - drainage network Sources and sinks of nutrients, across boundary fluxes Relate to TMDL assessment and modeling Calibration/validation of hydrologic/water quality models
Adaptive Best Management Practices Agricultural and urban Point and non-point Beyond BMPs Water storage and treatment on public and private lands Treatment systems (STAs) Model-based evaluation Water quality and economics Ranking of alternatives Stakeholders Urban (Residents, City) Agriculture, Tourism SFWMD, FDEP, County, FDACS, FWC etc