# Preliminary Report (DRAFT)

For Project Entitled 

# Nutrient Loading Rates, Reduction Factors and Implementation Costs Associated with BMPs and Technologies

Prepared for



# South Florida Water Ma nagement District

by


# Soil and Water Engineering Technology, Inc.

First Revision

May 8, 2008

# 2 INTRODUCTION
The South Florida Water Management District (SFWMD), in cooperation with the Florida Department of Environmental Pr otection (FDEP) and the Florida Department of Agriculture and Consumer Services (FDACS), is developing the Protection Plans for both Caloosahatchee River (C-43) and St. Lucie River (C-44) watersheds as required by the Northern Everglades and Estuaries Protection Program (Senat e Bill 392). The plans will be developed partia lly based on a nutrient reduction spreadsheet approach deta iling how water quality standards, including phosphorus and nitrogen, will be met. The sp readsheet provides load reduction estimates resulting from Best Management Practices (BMPs) , as well as local and regional projects. The letter report titled "Phosphorus Reduction Performance and Im plementation Costs under BMPs and Technologies in the Lake Okeechobee Protecti on Plan Area” provides only part of the input data needed for the BMP spreadsheet for these additional watersheds. Therefore the overall objectives of this project are to: 1) develop nutrient (nitrog en and phosphorus) loading rates, BMP reduction factors and implementation cost s for both C-43 and C-44 watersheds; and 2) conduct a detailed literature revi ew and data analysis to quantify the BMP e ffectiveness for each commodity and soil type statewide.
This draft report summarizes the efforts to date for completing the first task.

METHODOLOGY AND RESULTS
The approach taken for developi ng the nutrient reduction spreadsh eets for C-43 and C-44 was to update the previously developed spreadsheets fo r the Okeechobee watershed using the additional literature data, land use data, observed flow a nd nutrient load data, and information from watershed modeling project for the two wate rsheds. The SFWMD provided the land use breakdown for the two watersheds for twenty ma jor land use categories, which included the six new land use categories (low density residential, medium density residential, high density residential, horse farms, transportation, and utili ties. The following section describes how these data were used to develop the final unit nutri ent load and BMP reduction spreadsheets. Though the methodology was very similar for both the Caloos ahatchee and the St. Lucie watersheds, they are both included in order to highlight da ta sources and verifi cation differences.

St. Lucie River Watershed
Figure 1 shows the basins within the St. Lucie River watershed. The 20 04 land use distribution for this watershed was provided by SFWMD and is presented in Table 1. As can be seen, the table provides additional land use breakdowns beyond the twenty primary land use categories required for the project. These additional data were used during the development of the unit loads, but were integrated within the twenty cate gories for the final tables to prevent confusion. Measured data were provided by the SFWMD as presented in Table 2 which compared to data obtained from the CERP System-wide Performa nce Measure Documentation Sheet (April 5, 2007).

The initial estimates of the uni t nutrient loads were developed from the Okeechobee Basin data provided in the BMP Letter Repor t (Bottcher, 2006), general Flor ida estimates by Harper and

# 3 Baker (2003 and 2007), and data coll ected within the basin by Graves , et al (2004). The final N and P unit loads for the watershed presented in Table 3 were developed as an iterative process starting with the initial unit loads estimates linke d to a basin spreadsheet where the accumulative N and P loads from each basin could be calcul ated by multiplying the land use acreage by the unit loads. The net N and P loads were then comp ared to the measured ba sin and basin loads to verify if the net loads were at least in the ba llpark and how the calculated and measured N and P loads for each of the basins compared. It was cl ear that the dominant land uses in the western basins were improved pasture and citrus while the eastern basins were much more residential and urban. Using this cross informa tion it was possible to estimate the relative importance of the various land uses and adjustments were made accordingly to obtain a reasonable agreement of runoff and nutrient loads and concentrations for each of the basins. However, it was observed that there was a potential problem using the measured flow data for net load estimates because of the high runoff variability between basins as seen in Table 2 fo r the annual runoff in terms of inches per year. Therefore, the cross ba sin comparisons focused more on matching the concentrations because they would be less influenced by any flow errors that might be the result of unmeasured inter-basin transf ers. Since the unit loads are a function of both concentration and flow, it was first necessary to establish reasonabl e runoff coefficients for the various land uses (Harper and Baker, 2007). The resulting annual average runoff for the various land uses are provided in Table 3. Tables 3 also provides the resulting N and P unit loads and concentrations from the iterative process of adjusting indivi dual land use unit loads which multiplied by the acreage of each land use within the basins (Table 4) to obtain reasonable basin runoff (Table 5), P loads (Table 6), and N loads (Table 7) compar ison to observed data. The P unit load factors were adjusted individually based on best prof essional judgment. The N unit loads were also initially adjusted individually, but then a globa l multiplier factor was used to obtain reasonable matches to observed data. The verification for th e N and P concentrations are also provided in Tables 6 and 7, respectively at th e bottom of the tables. Note th at the net calculated loads are slightly higher than observed data because thes e represent net source lo ads which do not reflect the additional assimilation that is expected in the stream and canals before reaching the basin outlets.
The next step was to establish BMP N and P re duction estimates for the C-44 basin. This was done by adding BMP reduction estimates for the si x additional land use categories to the BMP reduction spreadsheets developed by Bottcher (2006). The resulting BMP reduction estimates and costs for N and P are presented in Appendix A. These tables reflect the updated unit loads provided in Tables 6 and 7. Table 8 provides a summary of the P unit loads and estimated BMP reduction factors for the three categories of owner implemented, typical incentive BMPs and alternative practices. Owner implemented BMPs reflect those that would likely be implemented by land owners without incentives, while the typical incentive BMPs are those that that either reasonably funded cost share program or modest regulatory approach would obtain implementation. The alternative practices are those that are more expensive but would be needed if additional nutrient reductions are needed beyond what the first two levels could obtain.
Table 9 provides the estimated existing total P lo ad from the watershed compared to estimated BMP reductions in terms of percentages, loads, and costs for an anticipate BMP program that could be reasonably implemented over the next te n years. Tables 10 and 11 provide the same information as Tables 8 and 9 except for N instea d of P. Table 10 provides a summary of the N

# 4 unit loads and estimated BMP reduction factors for the three categories of owner implemented and typical incentive BMPs and alternative prac tices. Table 11 provides the estimated existing total N load from the watershed compared to estimated BMP reductions in terms of percentages and loads for an anticipate BMP program that co uld be reasonably implemented over the next ten years. The estimated annual average implementati on costs are also provide d in Tables 9 and 11, which have been adjusted to 2008 costs from the 2006 costs provided in Appendix A.

Caloosahatchee River Watershed
Figure 2 shows the basins within the Caloosah atchee watershed. The 2004 land use distribution for the C-43 basin was provided by SFWMD and is presented in Ta ble 12. As can be seen, the table provides additional land use breakdowns beyond the twenty primary land use categories required for the project. These additional data were used during the development of the unit loads, but were integrated within the twenty cate gories for the final tables to prevent confusion. Measured data for the major structures on th e C-43 canal were provide d by the SFWMD and are presented in Table 13. Because of the influence of the Lake Okeechobee releases, only the basin (Freshwater West) between the S-78 and S-79 st ructures were considered reliable enough for comparisons to actual land source area discharges. Unmonitored flows released from the Lake Okeechobee, Nicodemus Slough, and the S-4 basin into the Freshwater East basin were considered more problematic than potential bypass water around S-78 as documented by the WAM model results (SWET, 2008). Therefore, the loads differences between these two structures shown in Table 13 were used for ve rification of the land use unit loads. The high measured discharge rates are a concer n and are discussed further below.

The initial estimates of the uni t nutrient loads were developed from the Okeechobee Basin data provided in the BMP Letter Repor t (Bottcher, 2006), general Flor ida estimates by Harper and Baker (2003 and 2007), WMM EMC estimates developed by CDM (2007), and the WAM modeling results for the USACE (SWET, 2008). Th e final N and P unit loads for the C-43 basin presented in Table 14 were developed as an iter ative process starting with the initial unit loads estimates linked to a basin spreadsheet where the accumulative N and P loads from each basin could be calculated by multiplying the land use acr eage by the unit loads. The net N and P loads were then compared to the measured basin and basi n loads to verify if the net loads were at least in the ballpark and how the calculated and measured N and P loads for each of the basins compared. It was clear that the dominant land us es in the western basins were improved pasture and citrus with limited urban around the Le Belle area. The more highly developed area is located in the western (tidal and north coastal) basins. Using just the Freshwater West basin, however, it was possible to estimate the relati ve importance of the various land uses and adjustments were made accordingly to obtain a reasonable agreement of runoff and nutrient loads and concentrations for each of the basins. However, it was observed that measured runoff for the Freshwater West basin seems high at 22 in ches per year as seen in Table 16, which makes the units loads higher than expected. Theref ore, the basin comparisons focused more on matching the concentrations because they would be less influenced by any flow errors that might be the result of unmeasured inter-basin transf ers. Since the unit loads are a function of both concentration and flow, it was firs t necessary to establish reasona ble runoff coefficients for the various land uses (Harper and Baker, 2007). Th e resulting annual average runoff for the various land uses are provided in Table 16. Table 16 also provides the resulting N and P unit loads and

# 5 concentrations from the iterative process of adjusting individual land use unit loads which multiplied by the acreage of each land use within the basins (Table 15) to obtain reasonable basin runoff (Table 16), P loads (Table 17), and N load s (Table 18) comparison to observed data. The P unit load factors were adjusted by hand. The N unit loads were al so initially adjusted by hand, but then a global multiplier factor was used to obtain reasonable matches to observed data at the basin level. The verification for the N and P loads and concentrations are also provided in Tables 17 and 18, respectively at the bottom of the tables. Note that the net calculated loads and concentrations are slightly higher than observe d data because these represent net source loads which do not reflect the additional assimilation that is expected in the streams and canals before reaching the basin outlets.
The next step was to establish BMP N and P re duction estimates for the C-43 basin. This was done by adding BMP reduction estimates for the si x additional land use categories to the BMP reduction spreadsheets developed by Bottcher (2006). The resulting BMP reduction estimates and costs for N and P are presented in Appendix B. These tables reflect the updated unit loads provided in Table 14. Table 19 provides a summary of the P unit loads and estimated BMP reduction factors for the three categories of ow ner implemented and typical incentive BMPs and alternative practices. Owner implemented BMPs reflect those that would likely be implemented by land owners without incentives, while the typical incentive BMPs are those that that either reasonably funded cost share program or modest regulatory approach would obtain implementation. The alternative practices are those that are more expensive but would be needed if additional nutrient reductions are needed beyond what the first two levels could obtain.
Table 20 provides the estimated existing total P lo ad from the C-44 basin compared to estimated BMP reductions in terms of percentages, loads, and costs for an anticipated BMP program that could be reasonably implemented over the next te n years. Tables 21 and 22 provide the same information as Tables 19 and 20 except for N. Table 21 provides a summary of the N unit loads and estimated BMP reduction factors for the thre e categories of owner implemented and typical incentive BMPs and alternative practices. Tabl e 22 provides the estimated existing total N load from the C-44 basin compared to estimated BMP reductions in terms of percentages, loads and costs for an anticipate BMP program that could be reasonably implemented over the next ten years. The estimated annual average implementa tion costs are also provided in Tables 20 and 22 for P and N, respectively. The costs have b een adjusted to 2008 costs from the 2006 costs provided in Appendix A.

# 6 REFERENCES
CDM. 2007. Nutrient Load Assessment Estero Bay and Caloosahatchee Watershed. Final Report to South Florida Water Manageme nt District. West Palm Beach, FL.

Graves, G.A., Y. Wan, and D.L. Fike. 2004. Water Quality Ch aracteristics of Storm Water From Major Land Uses in South Florida. J. American Water Res ources Association. 1405:1419
Harper, H.H. and D.M. Baker. 2003. Evaluati on of Alternative Stormwater Regulations for Southwest Florida. Final Report prepared by Environmental Research and Design for the Florida Department of Environm ental Protection, Tallahassee, FL.
Harper, H.H. and D.M. Baker. 2007. Evaluation of Current Stormwater Design Criteria within the State of Florida. Final Report prepar ed by Environmental Research and Design for the Florida Department of Enviro nmental Protection, Tallahassee, FL.
SWET. 2006. Phosphorus Reduction Performan ce and Implementation Costs under BMPs and Technologies in the Lake Okeechobee Protection Plan Area. Letter Report to Joyce Zhang, South Florida Water Management District.

SWET. 2008. Assessment of the Caloosahatch ee River (C-43) Basin Us ing the WAM Model. Final Report to the US Army Corp s of Engineers. Jacksonville, FL.

# 7 Figure 1. Basin Layout for the St. Lucie River Watershed8Figure 2. Basin Layout for the Caloosahatchee River Watershed

# 9 Table 1. Land Use Distribution in the St. Lucie Watershed

Land Use Category Land Use Description FLUCCS Area (ac) Percent S um_Area (ac) Percent Residential Low Density Residential Low Density 1100 22,050 4.29% 22,050 4.30% Residential Medium Density Residential Medium Density 1200 38,206 7.43% 38,206 7.40% Residential High Density Residential High Density 1300 7,698 1.50% 7,698 1.50% Commercial and Services 1400 5,090 0.99% Industrial 1500 2,034 0.40% Extractive 1600 640 0.12% Institutional 1700 2,977 0.58% Recreational 1800 5,167 1.00% Improved Pastures Improved Pastures 2110 106,321 20.67% 106,321 20.70% Unimproved Pastures Unimproved Pastures 2120 15,033 2.92% 15,033 2.90% Woodland Pastures 2130 25,205 4.90% Rangeland 3000 14,147 2.75% Row Crops Row Crops 2140 7,881 1.53% 7,881 1.50% Sugar Cane Sugar Cane 2156 5,562 1.08% 5,562 1.10% Citrus Citrus 2210 116,442 22.64% 116,442 22.60% Sod Farms Sod Farms 2420 294 0.06% 294 0.10% Ornamentals Ornamentals 2430 1,246 0.24% 1,246 0.20% Horse Farms Horse Farms 2510 784 0.15% 784 0.20% Dairies Dairies 2520 419 0.08% 419 0.10% Field Crops 2150 2,800 0.54% Other Groves 2230 48 0.01% Cattle Feeding Operations 2310 105 0.02% Poultry Feeding Operations 2320 107 0.02% Tree Nurseries 2410 463 0.09% Specialty Farms 2500 133 0.03% Aquaculture 2540 204 0.04% Fallow Crop Land 2610 248 0.05% Tree Plantations Tree Plantations 4400 0 0.00% 0 0.00% Water Water 5000 11,411 2.22% 11,411 2.20% Upland Forests 4000 37,608 7.31% Wetlands 6000 61,052 11.87% Barren Land 7000 2,613 0.51% Open Land 1900 4,108 0.80% Transportation Transportation 8100 5,665 1.10% 5,665 1.10% Communication 8200 91 0.02% Utilities 8300 10,438 2.03% Total 514,287 100.00% 514,287 100.00% Communication/Utilities 10,529 2.00% Other Areas

4,108 0.80%

Natural Areas
105,380 20.50% Other Urban

15,907 3.10%

Woodland Pastures/Rangeland 39,351 7.70%

# 10 

# Table 2 Summary of Measured Nitrogen and Phosphorus Load to SLE

Calculated Runoff (in)

Basins 4 5 6 15055 23620 18.8 34 1182 6 218.96 C-23 112675 152789 16.3 330 1750 91 480.55 C-24 87706 178853 24.5 355 1609 76 343.25 C-44&S-153 129719 158194 14.6 300 1540 40 203.38 North Fork* 119168 126152 12.7 185 1191 43 278 Tidal St. Lucie** 49965 59408 14.3 91 1244 21 285.16 Lake Okeechobee - 414754 922 1802 96 188.14 Total 514287 1113771 2218 1615 373 271.33

for TN concentration for North Fork basin, South Fork basin, and Basin 4 5 6. basin, and Lake Okeechobee. WaSh Model output data are used for flow from North Fork basin, South Fork basin, and Basin 4 5 6. (2) Measured data are used for TN concentration for C-23 basin, C-24 basin, C-44&S-153 basin, and Lake Okeechobee. WaSh Model output data are used (1) Measured data are used for flow from C-23 basin, C-24 basin, C-44&S-153 Sub-watershed Area ( acres ) Average Annual Discharge (1) 

### (1995-2005)

( Acre-ft ) Average A nnual TN Load (2) 

### (1995-2005)

( MTons ) Average Annual TP Conc. (Calculat ed) (1995-

2005) ( ppb ) Average Annual TP Load (2)



### (1995- 2005) ( MTons ) Average A nnual TN Conc. (Calculated

) (1995- 2005 ) ( ppb )

*North Fork basin includes North Fork and N. Mid. Estuary **Tidal St. Lucie basin includes South Fork and S. Mid. Estuary

# 11 Table 3. Estimated Runoff, Unit N and P Loads and Concentration for 2004 Land Uses in the St. Lucie Watershed

Land Use Category Land Use Description FLUCCS Runoff Unit N Load N Conc. Unit P Load P Conc. (in/yr) ) (mg/l) (lbs/acre/yr) (mg/l) Residential Low Density Residential Low Density 1 1100 17.57 4.95 1.25 0.49 0.12 Residential Medium Density Residential Medium Density 2 1200 20.76 7.20 1.53 1.40 0.30 Residential High Density Residential High Density 2 1300 23.96 10.80 1.99 3.00 0.55 Commercial and Services 2 1400 25.55 9.90 1.71 1.40 0.24
Industrial 2 1500 27.15 9.00 1.47 2.40 0.39
Extractive 2 1600 23.96 6.30 1.16 0.66 0.12
Institutional 2 1700 23.96 6.30 1.16 2.40 0.44
Recreational 2 1800 17.57 6.30 1.59 0.96 0.24 Improved Pastures Improved Pastures 2110 19.16 9.99 2.30 1.90 0.44 Unimproved Pastures Unimproved Pastures 2120 15.97 4.95 1.37 0.92 0.25 Woodland Pastures 2130 15.97 3.69 1.02 0.88 0.24 Rangeland 3000 15.97 3.69 1.02 0.28 0.08 Row Crops Row Crops 2140 22.36 13.50 2.67 4.50 0.89 Sugar Cane Sugar Cane 2156 19.16 7.20 1.66 0.63 0.15 Citrus Citrus 2210 19.16 7.65 1.76 1.80 0.42 Sod Farms Sod Farms 2420 19.16 8.10 1.87 2.52 0.58 Ornamentals Ornamentals 2430 19.16 10.80 2.49 2.90 0.67 Horse Farms Horse Farms 2510 15.97 14.40 3.99 1.82 0.50 Dairies Dairies 2520 15.97 18.00 4.98 9.38 2.60 Field Crops 2150 15.97 5.96 1.65 2.96 0.82 Mixed Crops 2160 19.16 9.90 2.28 3.50 0.81 Fruit Orchards 2220 19.16 8.10 1.87 2.30 0.53 Other Groves 2230 19.16 8.10 1.87 2.30 0.53 Cattle Feeding Operations 2310 19.16 48.65 11.22 8.96 2.07 Poultry Feeding Operations 2320 19.16 9.00 2.08 1.50 0.35 Tree Nurseries 2410 15.97 10.80 2.99 2.90 0.80 Specialty Farms 2500 15.97 7.20 1.99 1.82 0.50 Aquaculture 2540 7.99 9.00 4.98 0.70 0.39 Fallow Crop Land 2610 19.16 6.30 1.45 0.70 0.16 Tree Plantations Tree Plantations 4400 15.97 2.79 0.77 0.18 0.05 Water Water 5000 3.19 0.81 1.12 0.05 0.07 Upland Forests (not including 4400's) 4000 14.37 2.25 0.69 0.28 0.09

Wetlands 6000 1.60 1.35 3.74 0.01 0.03 Barren Land 7000 23.96 6.30 1.16 0.75 0.14 Open Land 1900 15.97 3.60 1.00 0.28 0.08 Transportation Transportation 8100 27.15 8.28 1.35 1.65 0.27 Communications 8200 15.97 5.40 1.49 0.48 0.13 Utilities 8300 15.97 5.40 1.49 0.48 0.13 1 Assumed on Septic 2 Assumed Discharge from WWT outside basin Communication/Utilities Other Urban

Woodland Pastures/Rangeland

Other Areas

Natural Areas

# 12 Table 4. Acreage of Land Uses within the St. Lucie Watershed

FLUCCS Basins 4 5 6 C-23 C-24 C-44&S-153 North Fork* Tidal St. Lucie** Grand Total
1100 4315.6 1909.4 1236.1 1813.7 9445 3329.8 22049.7
1200 1236.1 303.7 2505.9 314.9 30453.4 3392.3 38206.3
1300 702.6 295 185.7 4784.2 1730.3 7697.8
1400 222.9 9 39.8 204.4 3453.9 1159.8 5089.8
1500 133.2 48.3 55.5 76.7 1552.3 167.8 2033.7
1600 0.8 411.5 92.3 135.2 639.8
1700 110.3 661.7 21.7 97.7 1567.1 518.3 2976.7
1800 683.8 254.8 665.6 209.5 2308.4 1045.2 5167.3
1900 110.8 9.8 74.7 148.7 3291.5 472.2 4107.5
2110 1006.7 33628 33949.7 23185 4998.8 9552.4 106320.6
2120 86.4 5062 6064.3 2167.9 558.4 1094.1 15033.1
2130 374.6 8697.3 6890.3 6457.9 1071.8 1712.9 25204.8
2140 156.1 1696.2 1550.3 852.5 1166.2 2459.9 7881.1
2150 1574.6 834.7 390.9 2800.2
2156 5240.1 321.7 5561.8
2210 30.2 32466.1 17487.8 42754.5 20678.2 3025.4 116442.2
2220 0
2230 5 17.1 26.2 48.3
2310 104.7 104.7
2320 44.3 62.5 106.8
2410 100.2 153.8 55.5 85.3 68.3 0.1 463.1
2420 294.1 294.1
2430 211 25.1 267.6 237.9 504.4 1246
2500 28.7 23.9 79.9 132.6
2510 53.7 54 14.1 591.6 71.1 784.4
2520 419.1 419.1
2540 60.1 70.4 23.3 9.5 40.8 204.2
2610 216.7 31.3 247.9
3000 394.5 1603.5 220.1 6383.5 3494 2051 14146.6
4000 2679 2723.8 1264.5 11535.9 12030.8 7373.6 37607.6
5000 382.5 1810.5 1218.4 1890.7 4317.3 1791.3 11410.7
6000 1262.5 16278.9 12248.2 15114.6 9485.1 6662.2 61051.5
7000 1108.1 297.8 939 235.2 33.2 2613.4
8100 297.6 455.4 521.1 611.2 2623.4 1156.6 5665.3
8200 10.9 10.2 5.6 64.3 91
8300 428.3 916.1 102.4 7808.5 1099.2 83.1 10437.6 Grand Total 15055.4 112674.5 87705.8 129718.9 119167.9 49964.7 514287.2 *North Fork basin includes North Fork and N.Mid.Estuary **Tidal St. Lucie basin includes South Fork and S.Mid.Estuary

# 13 Table 5. Runoff in Acre-ft/yr to Stream by Land Use

FLUCCS Basins 4 5 6 C-23 C-24 C-44&S-153 North Fork* Tidal St. Lucie** Grand Total
1100 6318 2795 1810 2655 13827 4875 32280
1200 2139 525 4336 545 52689 5869 66102
1300 1403 0 589 371 9551 3454 15367
1400 475 19 85 435 7355 2470 10838
1500 301 109 126 174 3512 380 4601
1600 2 821 0 0 184 270 1277
1700 220 1321 43 195 3128 1035 5942
1800 1001 373 974 307 3379 1530 7565
1900 147 13 99 198 4381 628 5467
2110 1608 53706 54219 37028 7983 15256 169799
2120 115 6737 8071 2885 743 1456 20007
2130 499 11575 9170 8595 1426 2280 33544
2140 291 3160 2889 1588 2173 4583 14684
2150 0 2096 1111 520 0 0 3727
2156 0 0 0 8369 0 514 8882
2210 48 51850 27929 68281 33024 4832 185964
2220 0 0 0 0 0 0 0
2230 8 27 0 0 42 0 77
2310 0 167 0 0 0 0 167
2320 0 0 71 100 0 0 171
2410 133 205 74 114 91 0 616
2420 0 0 0 470 0 0 470
2430 337 0 40 427 380 806 1990
2500 0 0 0 38 32 106 176
2510 71 72 19 787 0 95 1044
2520 0 558 0 0 0 0 558
2540 40 47 16 0 6 27 136
2610 0 346 0 0 50 0 396
3000 525 2134 293 8496 4650 2730 18827
4000 3209 3263 1515 13818 14410 8832 45046
5000 102 482 324 503 1149 477 3037
6000 168 2167 1630 2012 1262 887 8125
7000 0 2212 595 1875 470 66 5217
8100 673 1030 1179 1383 5935 2617 12818
8200 15 14 0 7 86 0 121
8300 570 1219 136 10392 1463 111 13891 Grand Total 20417 149043 117341 172566 173382 66183 698,932 (in/yr) 16 16 16 16 17 16 16 *North Fork basin includes North Fork and N.Mid.Estuary **Tidal St. Lucie basin includes South Fork and S.Mid.Estuary

# 14 Table 6. Net P Loads in Pounds/year to Stream within the St. Lucie watershed by Land Use
FLUCCS Basins 4 5 6 C-23 C-24 C-44&S-153 North Fork* Tidal St. Lucie** Grand Total
1100 2115 936 606 889 4628 1632 10804
1200 1731 425 3508 441 42635 4749 53489
1300 2108 0 885 557 14353 5191 23093
1400 312 13 56 286 4835 1624 7126
1500 320 116 133 184 3726 403 4881
1600 1 272 0 0 61 89 422
1700 265 1588 52 234 3761 1244 7144
1800 656 245 639 201 2216 1003 4961
1900 31 3 21 42 922 132 1150
2110 1913 63893 64504 44052 9498 18150 202009
2120 79 4657 5579 1994 514 1007 13830
2130 330 7654 6063 5683 943 1507 22180
2140 702 7633 6976 3836 5248 11070 35465
2150 0 4668 2475 1159 0 0 8301
2156 0 0 0 3301 0 203 3504
2210 54 58439 31478 76958 37221 5446 209596
2220 0 0 0 0 0 0 0
2230 12 39 0 0 60 0 111
2310 0 938 0 0 0 0 938
2320 0 0 66 94 0 0 160
2410 291 446 161 247 198 0 1343
2420 0 0 0 741 0 0 741
2430 612 0 73 776 690 1463 3613
2500 0 0 0 52 43 145 241
2510 98 98 26 1077 0 129 1428
2520 0 3931 0 0 0 0 3931
2540 42 49 16 0 7 29 143
2610 0 152 0 0 22 0 174
3000 110 449 62 1787 978 574 3961
4000 750 763 354 3230 3369 2065 10530
5000 19 91 61 95 216 90 571
6000 13 163 122 151 95 67 611
7000 0 831 223 704 176 25 1960
8100 491 751 860 1008 4329 1908 9348
8200 5 5 0 3 31 0 44
8300 206 440 49 3748 528 40 5010 Grand Total 13264 159686 125049 153531 141301 59983 652814 Conc.(ppbl) 233 384 382 319 292 325 335 Meas.Conc.(ppb) 219 481 343 203 278 285 Lake Okee (lbs) 211200 Calc. (Mt/yr) 6 73 57 70 64 27 393 Measured (Mt/yr) 6 91 76 40 43 21 373 *North Fork basin includes North Fork and N.Mid.Estuary **Tidal St. Lucie basin includes South Fork and S.Mid.Estuary

# 15 Table 7. Net N Loads in Pounds/year to Stre am within the St. Lucie Watershed by Land Use
FLUCCS Basins 4 5 6 C-23 C-24 C-44&S-153 North Fork* Tidal St. Lucie** Grand Total
1100 21362 9452 6119 8978 46753 16483 109146
1200 8900 2187 18042 2267 219264 24425 275085
1300 7588 0 3186 2006 51669 18687 83136
1400 2207 89 394 2024 34194 11482 50389
1500 1199 435 500 690 13971 1510 18303
1600 5 2592 0 0 581 852 4031
1700 695 4169 137 616 9873 3265 18753
1800 4308 1605 4193 1320 14543 6585 32554
1900 399 35 269 535 11849 1700 14787
2110 10057 335944 339158 231618 49938 95428 1062143
2120 428 25057 30018 10731 2764 5416 74414
2130 1382 32093 25425 23830 3955 6321 93006
2140 2107 22899 20929 11509 15744 33209 106395
2150 0 9384 4975 2330 0 0 16689
2156 0 0 0 37729 0 2316 40045
2210 231 248366 133782 327072 158188 23144 890783
2220 0 0 0 0 0 0 0
2230 41 139 0 0 212 0 391
2310 0 5094 0 0 0 0 5094
2320 0 0 399 563 0 0 961
2410 1082 1661 599 921 738 1 5001
2420 0 0 0 2382 0 0 2382
2430 2279 0 271 2890 2569 5448 13457
2500 0 0 0 207 172 575 955
2510 773 778 203 8519 0 1024 11295
2520 0 7544 0 0 0 0 7544
2540 541 634 210 0 86 367 1838
2610 0 1365 0 0 197 0 1562
3000 1456 5917 812 23555 12893 7568 52201
4000 6028 6129 2845 25956 27069 16591 84617
5000 310 1467 987 1531 3497 1451 9243
6000 1704 21977 16535 20405 12805 8994 82420
7000 0 6981 1876 5916 1482 209 16464
8100 2464 3771 4315 5061 21722 9577 46909
8200 59 55 0 30 347 0 491
8300 2313 4947 553 42166 5936 449 56363 Grand Total 79917 762762 616731 803355 723011 303076 3288847 Conc.(ppb) 1404 1836 1885 1670 1496 1643 1688 Meas.Conc.(ppb) 1182 1750 1609 1540 1191 1244 Lake Okee (lbs) 2028400 Calc. (Mt/yr) 36 347 280 365 329 138 2417 Measured (Mt/yr) 34 330 355 300 185 91 2217 *North Fork basin includes North Fork and N.Mid.Estuary **Tidal St. Lucie basin includes South Fork and S.Mid.Estuary

# 16 Table 8. Land Use Categories, Unit Load Factors, and P Reduction Factors for the St. Lucie Watershed Land Use Category Land Use Description FLUCCS Unit P Load

(lbs/acre/yr) Owner Implemented

BMPs ( 1 ) Typical Cost Share BMPs Alternative Practices

Residential Low Density Residential Low Density 1 1100 0.49 5% 0% 0% Residential Medium Density Residential Medium Density 2 1200 1.40 5% 0% 0% Residential High Density Residential High Density 2 1300 3.00 5% 5% 0% Other Urban Commercial/Industrial 2 1400-1800 1.54 5% 5% 0% Improved Pastures Improved Pastures 2110 1.90 11% 19% 49% Unimproved Pastures Unimproved Pastures 2120 0.92 7% 13% 44% Woodland Pastures/Rangeland Woodland/Range Pastures 2130/3000 0.66 4% 6% 35% Row Crops Row Crops 2140 4.50 30% 30% 50% Sugar Cane Sugar Cane 2156 0.63 10% 23% 52% Citrus Citrus 2210 1.80 12% 20% 42% Sod Farms Sod Farms 2420 2.52 20% 27% 50% Ornamentals Ornamentals 2430 2.90 32% 35% 50% Horse Farms Horse Farms 2510 1.82 20% 22% 49% Dairies Dairies 2520 9.38 9% 28% 48% Other Areas Other Areas 2150-2610 2.78 15% 25% 36% Tree Plantations Tree Plantations 4400 0.18 1% 10% 50% Water Water 5000 0.05 0% 0% 0% Natural Areas Forrests/wetlands/Open 4000/6000 0.14 0% 0% 0% Transportation Transportation 8100 1.65 10% 23% 52% Communication/Utilities Communication/Utilities 8200/8300 0.48 5% 5% 0% 1 Assumed on Septic 2 Assumed all of Discharge from WWT outside basin Estimated Phosphorus Reduction

# 17 Table 9. Land Use Categories, Unit Load Factors, and Estimated P Reduction Factors Using 2004 Land Use for the St. Lucie Watershed Land Use Category Land Use Description FLUCCS Percent of Basin Unit P Load Total P Annual Cost

(lbs/acre/yr) (MT/yr) (percent) (MT/yr) ($) Residential Low Density Residential Low Density 1 1100 4.29% 0.49 4.9 5% 0.2 25,288,704 Residential Medium Density Residential Medium Density 2 1200 7.43% 1.40 24.3 5% 1.2 43,817,697 Residential High Density Residential High Density 2 1300 1.50% 3.00 10.5 10% 1.0 17,657,364 Other Urban Commercial/Industrial2 1400-1800 3.09% 1.54 11.2 10% 1.1 32,580,227 Improved Pastures Improved Pastures 2110 20.67% 1.90 91.8 30% 27.5 1,886,220 Unimproved Pastures Unimproved Pastures 2120 2.92% 0.92 6.3 20% 1.3 71,119 Woodland Pastures/Rangeland Woodland/Range Pastures 2130/3000 7.65% 0.66 11.9 10% 1.2 166,222 Row Crops Row Crops 2140 1.53% 4.50 16.1 60% 9.7 621,401 Sugar Cane Sugar Cane 2156 1.08% 0.63 1.6 33% 0.5 219,276 Citrus Citrus 2210 22.64% 1.80 95.3 32% 30.5 9,781,128 Sod Farms Sod Farms 2420 0.06% 2.52 0.3 47% 0.2 11,591 Ornamentals Ornamentals 2430 0.24% 2.90 1.6 67% 1.1 98,245 Horse Farms Horse Farms 2510 0.15% 1.82 0.6 42% 0.3 12,982 Dairies Dairies 2520 0.08% 9.38 1.8 37% 0.7 490,398 Other Areas Other Areas 2150-2610 0.80% 2.78 5.2 40% 2.1 65,079 Tree Plantations Tree Plantations 4400 0.00% 0.18 0.0 11% 0.0 0 Water Water 5000 2.22% 0.05 0.3 0% 0.0 0 Natural Areas Forrests/wetlands/Open 4000/6000 20.49% 0.14 6.5 0% 0.0 0 Transportation Transportation 8100 1.10% 1.65 4.2 33% 1.4 223,337 Communication/Utilities Communication/Utilities 8200/8300 2.05% 0.48 2.3 10% 0.2 6,711,109 Total Basin 100.00% 1.22 286 28% 79 122,044,735 1 Assumed on Septic 2 Assumed all of Discharge from WWT outside basin Estimated P Reduction

# 18 Table 10. Land Use Categories, Unit Load Factors, and N Reduction Factors for the St. Lucie Watershed Land Use Category Land Use Description FLUCCS Unit N Load

(lbs/acre/yr) Owner Implemented BMPs Typical Incentive

BMPs Alternative Practices

Residential Low Density Residential Low Density 1 1100 4.95 15% 15% 15% Residential Medium Density Residential Medium Density 2 1200 7.20 25% 25% 15% Residential High Density Residential High Density 2 1300 10.80 30% 25% 15% Other Urban Commercial/Industrial 2 1400-1800 7.80 25% 25% 15% Improved Pastures Improved Pastures 2110 9.99 17% 10% 30% Unimproved Pastures Unimproved Pastures 2120 4.95 11% 8% 30% Woodland Pastures/Rangeland Woodland/Range Pastures 2130/3000 3.69 4% 6% 20% Row Crops Row Crops 2140 13.50 30% 30% 50% Sugar Cane Sugar Cane 2156 7.20 10% 23% 52% Citrus Citrus 2210 7.65 10% 20% 42% Sod Farms Sod Farms 2420 8.10 20% 27% 50% Ornamentals Ornamentals 2430 10.80 25% 25% 25% Horse Farms Horse Farms 2510 14.40 30% 22% 30% Dairies Dairies 2520 18.00 20% 40% 48% Other Areas Other Areas 2150-2610 7.91 15% 25% 36% Tree Plantations Tree Plantations 4400 2.79 5% 10% 25% Water Water 5000 0.81 0% 0% 0% Natural Areas Forrests/wetlands/Open 4000/6000 1.88 0% 0% 0% Transportation Transportation 8100 8.28 20% 23% 25% Communication/Utilities Communication/Utilities 8200/8300 5.40 30% 25% 15% 1 Assumed on Septic 2 Assumed all of Discharge from WWT outside basin Estimated Nitrogen Reduction

# 19 Table 11. Land Use Categories, Unit Load Factors, and Estimated N Reduction Factors Using 2004 Land Use for the St. Lucie Watershed Land Use Category Land Use Description FLUCCS Percent of Basin Unit N Load Total N Annual Cost

(lbs/acre/yr) (MT/yr) (percent) (MT/yr) ($) Residential Low Density Residential Low Density 1 1100 4.29% 4.95 49.6 30% 14.9 34,543,867 Residential Medium Density Residential Medium Density 2 1200 7.43% 7.20 125.0 50% 62.5 59,891,448 Residential High Density Residential High Density 2 1300 1.50% 10.80 37.8 55% 20.8 12,067,329 Other Urban Commercial/Industrial2 1400-1800 3.09% 7.80 56.4 55% 31.0 26,857,201 Improved Pastures Improved Pastures 2110 20.67% 9.99 482.8 27% 130.4 1,286,059 Unimproved Pastures Unimproved Pastures 2120 2.92% 4.95 33.8 19% 6.4 43,872 Woodland Pastures/Rangeland Woodland/Range Pastures 2130/3000 7.65% 3.69 66.0 10% 6.6 126,934 Row Crops Row Crops 2140 1.53% 13.50 48.4 60% 29.0 423,683 Sugar Cane Sugar Cane 2156 1.08% 7.20 18.2 33% 6.0 150,594 Citrus Citrus 2210 22.64% 7.65 404.9 30% 121.5 13,942,553 Sod Farms Sod Farms 2420 0.06% 8.10 1.1 47% 0.5 7,903 Ornamentals Ornamentals 2430 0.24% 10.80 6.1 50% 3.1 49,989 Horse Farms Horse Farms 2510 0.15% 14.40 5.1 52% 2.7 9,483 Dairies Dairies 2520 0.08% 18.00 3.4 60% 2.1 298,538 Other Areas Other Areas 2150-2610 0.80% 7.91 14.8 40% 5.9 57,682 Tree Plantations Tree Plantations 4400 0.00% 2.79 0.0 15% 0.0 0 Water Water 5000 2.22% 0.81 4.2 0% 0.0 0 Natural Areas Forrests/wetlands/Open 4000/6000 20.49% 1.88 90.1 0% 0.0 0 Transportation Transportation 8100 1.10% 8.28 21.3 43% 9.2 201,666 Communication/Utilities Communication/Utilities 8200/8300 2.05% 5.40 25.8 55% 14.2 12,310,996 Total Basin 100% 6.23 1,457 31% 446 150,202,466 1 Assumed on Septic 2 Assumed all of Discharge from WWT outside basin Estimated N Reduction

# 20 Table 12. Land Use Distribution for the Caloosahatchee Watershed Land Use Category Land Use Description FLUCCS A rea (ac) Percent Area (ac) Percent Residential Low Density Residential Low Density 1100 76,863 7.12% 76,863 7.10% Residential Medium Densit y Residential Medium Densit y 1200 33,396 3.09% 33,396 3.10% Residential High Densit y Residential High Densit y 1300 11,453 1.06% 11,453 1.10% Commercial and Services 1400 8,906 0.82% Industrial 1500 2,648 0.25% Extractive 1600 2,278 0.21% Institutional 1700 3,675 0.34% Recreational 1800 6,062 0.56% Improved Pastures Improved Pastures 2110 117,152 10.85% 117,152 10.80% Unimproved Pastures Unimproved Pastures 2120 23,827 2.21% 23,827 2.20% Woodland Pastures 2130 20,280 1.88% Rangeland 3000 57,850 5.36% Row Crops Row Crops 2140 9,656 0.89% 9,656 0.90% Sugar Cane Sugar Cane 2156 87,741 8.13% 87,741 8.10% Citrus Citrus 2210 96,684 8.95% 96,684 9.00% Sod Farms Sod Farms 2420 5,070 0.47% 5,070 0.50% Ornamentals Ornamentals 2430 861 0.08% 861 0.10% Horse Farms Horse Farms 2510 202 0.02% 202 0.00% Dairies Dairies 2520 56 0.01% 56 0.00% Field Crops 2150 5,326 0.49% Mixed Crops 2160 17 0.00% Fruit Orchards 2220 12 0.00% Other Groves 2230 1,995 0.18% Tree Nurseries 2410 971 0.09% Specialty Farms 2500 165 0.02% Aquaculture 2540 215 0.02% Fallow Crop Land 2610 2,209 0.20% Tree Plantations Tree Plantations 4400 42,498 3.94% 42,498 3.90% Water Water 5000 130,368 12.07% 130,368 12.10% Upland Forests (not including 4400's) 4000 84,379 7.81%

Wetlands 6000 184,666 17.10% Barren Land 7000 5,866 0.54% Open Land 1900 49,378 4.57% Transportation Transportation 8100 4,915 0.46% 4,915 0.50% Communications 8200 96 0.01% Utilities 8300 2,063 0.19% Total 1,079,796 100.00% 1,079,796 100.00% Communication/Utilities 2,159 0.20% Other Areas 10,909 1.00%

Natural Areas 324,289 30.00% Other Urban 23,568 2.20%

Woodland Pastures/Rangeland 78,130 7.20%21Table 13. Summary of Annual Flow and Loads for TP and TN along the main stem of the Caloosahatchee River (C-43 Canal)Flow TP Load TP Conc.TN Load TN Conc. Flow TP Load TP Conc.TN Load TN Conc.Flow TP Load TP Conc.TN Load TN Conc.Flow TP Load TP Conc.TN Load TN Conc.acre-feet mtons ug/L mtons mg/L acre-feet mtons ug/L mtons mg/L acre-feet mtons ug/L mtons mg/L acre-feet mtons ug/L mtons mg/L1990 120,57514.0 94 237.61.60 174,966 33.0 153 322.4 1.49 423,951 101.0 193 936.9 1.79 248,98668222 6142.001991 63,5947.3 93 136.21.74 288,783 72.1 202 670.0 1.88 922,265 193.2 170 1,890.5 1.66 633,481121155 1,2211.561992 193,27522.9 96 344.71.45 437,933 93.2 172 756.4 1.40 943,491 406.5 349 2,198.8 1.89 505,559313502 1,4422.311993 500,24330.7 50 1,382.32.24 645,118 68.2 86 972.4 1.22 1,230,588 182.0 120 2,334.1 1.54 585,470114158 1,3621.891994 770,25350.7 53 1,345.01.42 1,044,125 119.2 93 2,201.9 1.71 1,633,414 216.6 108 3,380.2 1.68 589,28997134 1,1781.621995 2,110,116113.5 44 4,311.31.66 2,381,744 186.4 63 3,244.1 1.10 3,379,883 314.1 75 5,482.4 1.32 998,139128104 2,2381.821996 474,48947.0 80 797.61.36 568,330 58.2 83 853.6 1.22 941,009 129.5 112 1,647.2 1.42 372,68071155 7941.731997 158,04916.2 83 393.52.02 290,448 36.2 101 661.3 1.85 756,311 114.8 123 1,413.3 1.51 465,86479137 7521.311998 1,618,473135.5 68 2,988.81.50 1,831,790 204.9 91 3,216.9 1.42 2,613,724 296.8 92 4,309.0 1.34 781,9339295 1,0921.131999 564,10452.4 75 945.31.36 848,093 123.6 118 1,602.2 1.53 1,578,821 324.1 166 3,041.8 1.56 730,729201222 1,4401.602000 477,520104.7 178 1,683.52.86 409,244 47.1 93 687.8 1.36 619,878 118.6 155 1,061.9 1.39 210,63471275 3741.442001 72,7719.0 101 172.21.92 176,661 66.0 303 462.5 2.12 835,815 232.8 226 1,694.6 1.64 659,154167205 1,2321.522002 466,05257.4 100 969.61.69 888,496 154.4 141 1,774.4 1.62 1,491,120 318.2 173 3,166.7 1.72 602,624164220 1,3921.872003 1,396,713101.5 59 2,454.01.42 1,745,887 209.3 97 3,239.4 1.50 2,589,761 335.0 105 4,529.1 1.42 843,874126121 1,2901.242004 1,120,739127.3 92 2,146.61.55 1,247,980 128.0 83 1,996.4 1.30 1,853,038 230.2 101 2,815.2 1.23 605,058102137 8191.102005 2,266,435384.6 138 4,597.71.64 2,898,397 476.4 133 5,821.6 1.63 3,734,684 577.7 125 6,740.1 1.46 836,28710198 9180.892006 353,75865.1 149 732.91.68 463,033 88.2 154 856.5 1.50 920,989 193.0 170 1,689.2 1.49 457,956105186 8331.471990-2006 748,656 78.8 85 1,508.2 1.63 961,237 127.3 107 1,725.9 1.46 1,556,985 252.0 131 2,843.0 1.48 595,748 125 170 1,117 1.521995-2005 975,042 104.5 87 1,950.9 1.62 1,207,915 153.7 103 2,141.8 1.44 1,854,004 272.0 119 3,263.7 1.43 646,089 118 148 1,122 1.41CalendarYearBasin Between S78 and S79S-77 (02292000) S-78 (02292480) S-79 (02292900)

# 22 Table 14. Estimated Runoff, Unit N and P Loads and Concen tration for 2004 Land Uses in the Caloosahatchee Watershed

Land Use Category Land Use Description FLUCCS Runoff Unit N Load N Conc. Unit P Load P Conc. (in/yr) (lbs/acre/yr) (mg/l) (lbs/acre/yr) (mg/l) Residential Low Density Residential Low Density 1 1100 27.4313 7.26 1.17 0.68 0.11 Residential Medium Density Residential Medium Density 2 1200 32.4188 10.56 1.44 1.93 0.26 Residential High Density Residential High Density 2 1300 39.9 15.84 1.75 4.14 0.46 Commercial and Services 2 1400 39.9 14.52 1.61 1.93 0.21 Industrial 2 1500 42.3938 13.20 1.38 3.31 0.35 Extractive 2 1600 37.4063 9.24 1.09 0.91 0.11 Institutional 2 1700 37.4063 9.24 1.09 3.31 0.39 Recreational 2 1800 27.4313 9.24 1.49 1.32 0.21 Improved Pastures Improved Pastures 2110 29.925 14.65 2.16 1.93 0.29 Unimproved Pastures Unimproved Pastures 2120 24.9375 7.26 1.29 0.99 0.18 Woodland Pastures 2130 24.9375 5.41 0.96 0.83 0.15 Rangeland 3000 19.95 5.41 1.20 0.25 0.06 Row Crops Row Crops 2140 34.9125 19.80 2.51 3.45 0.44 Sugar Cane Sugar Cane 2156 29.925 10.56 1.56 0.55 0.08 Citrus Citrus 2210 29.925 11.22 1.66 0.90 0.13 Sod Farms Sod Farms 2420 29.925 11.88 1.75 2.79 0.41 Ornamentals Ornamentals 2430 29.925 15.84 2.34 4.00 0.59 Horse Farms Horse Farms 2510 24.9375 21.12 3.74 2.51 0.45 Dairies Dairies 2520 24.9375 26.40 4.68 12.94 2.29 Field Crops 2150 24.9375 8.74 1.55 4.09 0.73 Mixed Crops 2160 29.925 14.52 2.14 4.83 0.71 Fruit Orchards 2220 29.925 11.88 1.75 3.17 0.47 Other Groves 2230 29.925 11.88 1.75 3.17 0.47 Cattle Feeding Operations 2310 29.925 71.35 10.54 12.37 1.83 Poultry Feeding Operations 2320 29.925 13.20 1.95 2.07 0.31 Tree Nurseries 2410 24.9375 15.84 2.81 4.00 0.71 Specialty Farms 2500 24.9375 10.56 1.87 2.51 0.45 Aquaculture 2540 12.4688 13.20 4.68 0.97 0.34 Fallow Crop Land 2610 29.925 9.24 1.36 0.97 0.14 Tree Plantations Tree Plantations 4400 14.9625 4.09 1.21 0.21 0.06 Water Wate r 5000 4.9875 1.19 1.05 0.07 0.06 Upland Forests (not including 4400's) 4000 14.9625 3.30 0.97 0.10 0.03 Wetlands 6000 7.48125 1.98 1.17 0.01 0.01 Barren Land 7000 37.4063 9.24 1.09 1.04 0.12 Open Land 1900 24.9375 5.28 0.94 0.39 0.07 Transportation Transportation 8100 49.875 12.14 1.08 2.28 0.20 Communications 8200 27.4313 7.92 1.28 0.66 0.11 Utilities 8300 24.9375 7.92 1.40 0.66 0.12

1 Assumed on Septic 2 Assumed about 70% of Discharge from WWT outside basin Communication/Utilities Other Urban

Woodland Pastures/Rangeland

Other Areas

Natural Areas

# 23 Table 15. Acreage of Land Uses within the Caloosahatchee Watershed

FLUCCS Caloosahatc hee Estuary Freshwater East Freshwater West Nearshore North Coastal S-4 Tidal Grand Total 

## 1100 19 3,015 14,869 4236 24,084 548 30,092 76,863 1200 65 383 1,758 1741 1,825 1,506 26,118 33,396 1300 15 59 398 983 1,434 77 8,486 11,453 1400 8 191 688 421 384 428 6,787 8,906 1500 236 445 6 23 1,264 673 2,648 1600 553 22 3 340 68 1,292 2,278 1700 0 105 245 91 475 213 2,545 3,675 1800 11 76 472 1193 1,039 257 3,014 6,062 1900 1 2,437 25,047 522 6,947 204 14,220 49,378 2110 1 36,795 55,555 231 2,381 797 21,392 117,152 2120 5,752 12,736 30 436 4,873 23,827 2130 3 5,924 10,033 67 83 4,171 20,280 2140 1,080 6,354 363 228 1,632 9,656 2150 422 1,269 8 56 38 3,533 5,326 2156 52,751 2,058 32,932 87,741 2160 17 17 2210 26,593 69,008 193 66 824 96,684 2220 12 12 2230 53 1793 6 143 1,995 2410 174 111 185 270 230 971 2420 289 2,947 1,833 5,070 2430 16 369 160 15 300 861 2500 79 17 68 165 2510 140 38 24 202 2520 18 38 56 2540 27 91 97 215 2610 133 1,124 80 68 803 2,209 3000 50 4,966 21,510 3087 8,929 278 19,030 57,850 4000 51 7,791 23,793 3396 10,881 359 38,108 84,379 4400 12,923 28,403 69 1,103 42,498 5000 15780 2,061 3,639 94206 6,848 717 7,117 130,368 6000 275 30,329 63,513 24493 21,682 1,193 43,181 184,666 7000 1,910 2,244 67 456 675 514 5,866 8100 6 741 645 36 488 330 2,668 4,915 8200 20 24 10 42 96 8300 1 388 171 62 395 268 777 2,063 Grand Tot a 16,285 198,299 349,734 137653 89 ,583 42,504 245,738 1,079,796

# 24 Table 16. Runoff in Acre-ft/year to Streams within the Caloosahatchee Watershed

FLUCCS Caloosahatch ee Estuary Freshwater East Freshwater West Nearshore North Coastal S-4 Tidal Grand Total 

### 1100 43 6892 33990 9683 55055 1253 68788 175704 1200 176 1035 4749 4703 4930 4069 70559 90221 1300 50 196 1323 3268 4768 256 28216 38081 1400 27 635 2288 1400 1277 1423 22567 29612 1500 0 834 1572 21 81 4465 2378 9355 1600 0 1724 69 9 1060 212 4027 7101 1700 0 327 764 284 1481 664 7933 11456 1800 25 174 1079 2727 2375 587 6890 13857 1900 2 5064 52051 1085 14437 424 29551 102614 2110 2 91758 138540 576 5938 1988 53346 292148 2120 0 11953 26467 62 906 0 10127 49515 2130 6 12311 20850 139 172 0 8668 42144 2140 0 3142 18486 1056 663 0 4748 28093 2150 0 877 2637 17 116 79 7342 11068 2156 0 131548 5132 0 0 82124 0 218804 2160 0 0 42 0 0 0 0 42 2210 0 66316 172089 481 0 165 2055 241106 2220 0 0 0 0 0 0 30 30 2230 0 0 132 4471 15 0 357 4975 2410 0 362 231 384 0 561 478 2018 2420 0 721 7349 0 0 0 4571 12643 2430 0 40 920 399 37 0 748 2147 2500 0 0 164 0 0 35 141 343 2510 0 291 79 0 0 0 50 420 2520 0 37 0 0 0 0 79 116 2540 0 28 95 0 0 0 101 223 2610 0 332 2803 200 170 0 2002 5509 3000 83 8256 35760 5132 14844 462 31637 96176 4000 64 9714 29667 4234 13567 448 47516 105210 4400 0 16113 35415 0 86 0 1375 52990 5000 6559 857 1512 39154 2846 298 2958 54184 6000 171 18908 39596 15270 13517 744 26921 115128 7000 0 5954 6995 209 1421 2104 1602 18285 8100 25 3080 2681 150 2028 1372 11089 20428 8200 0 46 55 0 23 0 96 219 8300 2 806 355 129 821 557 1615 4287 Total (ac-ft) 7,235 400,330 645,938 95,245 142,636 104,289 460,562 1,856,254 V erification Calculated Runoff 645,938 Measured Runoff 646,089 (inches) 22.17

# 25 Table 17. Net P Loads in Pounds/year to Stream within the Caloosahatchee watershed

FLUCCS Caloosahatc hee Estuary Freshwater East Freshwater West Nearshore North Coastal S-4 Tidal Grand Total 

### 1100 12.8 2038.7 10054.4 2864.4 16285.6 370.6 20348.2 51974.8 1200 125.6 740.0 3396.5 3363.6 3525.9 2909.6 50460.0 64521.1 1300 62.1 244.3 1647.7 4069.6 5936.8 318.8 35132.0 47415.4 1400 15.5 369.0 1329.2 813.4 741.9 826.9 13112.5 17206.4 1500 0.0 781.6 1473.8 19.9 76.2 4186.4 2229.0 8770.2 1600 0.0 503.7 20.0 2.7 309.7 61.9 1176.8 2074.8 1700 0.0 347.8 811.4 301.4 1573.2 705.5 8429.0 12171.6 1800 14.6 100.7 625.3 1580.5 1376.5 340.5 3992.9 8030.9 1900 0.4 941.7 9678.2 201.7 2684.3 78.8 5494.6 19079.7 2110 1.9 71087.9 107332.3 446.3 4600.1 1539.8 41329.3 226337.7 2120 0.0 5715.2 12654.5 29.8 433.2 0.0 4841.8 23674.5 2130 2.5 4905.1 8307.3 55.5 68.7 0.0 3453.6 16791.8 2140 0.0 3726.0 21921.3 1252.4 786.6 0.0 5630.4 33313.2 2150 0.0 1726.5 5191.6 32.7 229.1 155.5 14454.0 21789.4 2156 0.0 29118.6 1136.0 0.0 0.0 18178.5 0.0 48433.0 2160 0.0 0.0 82.1 0.0 0.0 0.0 0.0 82.1 2210 0.0 23853.9 61900.2 173.1 0.0 59.2 739.1 86725.5 2220 0.0 0.0 0.0 0.0 0.0 0.0 38.1 38.1 2230 0.0 0.0 168.2 5691.0 19.0 0.0 453.9 6332.1 2410 0.0 696.3 444.2 740.4 0.0 1080.5 920.5 3885.9 2420 0.0 805.6 8215.1 0.0 0.0 0.0 5109.7 14133.1 2430 0.0 64.0 1476.7 640.3 60.0 0.0 1200.6 3445.7 2500 0.0 0.0 198.4 0.0 0.0 42.7 170.8 414.4 2510 0.0 351.6 95.4 0.0 0.0 0.0 60.3 507.3 2520 0.0 233.0 0.0 0.0 0.0 0.0 491.9 724.9 2540 0.0 26.1 87.9 0.0 0.0 0.0 93.7 207.7 2610 0.0 128.5 1085.8 77.3 65.7 0.0 775.7 2133.9 3000 12.4 1233.6 5343.1 766.8 2218.0 69.1 4727.1 14369.9 4000 4.9 752.6 2298.4 328.1 1051.1 34.7 3681.2 8151.0 4400 0.0 2675.1 5879.4 0.0 14.3 0.0 228.3 8797.1 5000 1088.8 142.2 251.1 6500.2 472.5 49.5 491.1 8995.4 6000 3.8 418.5 876.5 338.0 299.2 16.5 595.9 2548.4 7000 0.0 1976.9 2322.5 69.3 472.0 698.6 532.0 6071.3 8100 13.7 1687.3 1468.7 82.0 1111.2 751.4 6075.0 11191.5 8200 0.0 13.2 15.9 0.0 6.6 0.0 27.8 63.6 8300 0.7 257.0 113.3 41.1 261.6 177.5 514.7 1366.5 Grand Tot a 1359.6 157662.0 277902.6 30481.4 44679.0 32652.3 237011.4 781770.1

Verification Data for Freshwater West Calculated 277,903 lbs/year 0.158 mg/l Measured 260,240 lbs/year 0.148 mg/l

# 26 Table 18. Net N Loads in Pounds/year to Stream within the Caloosahatchee Watershed

FLUCCS Caloosahatc hee Estuary Freshwater East Freshwater West Nearshore North Coastal S-4 Tidal Grand Total 

### 1100 137.9 21888.9 107948.9 30753.4 174849.8 3978.5 218467.9 558025.4 1200 686.4 4044.5 18564.5 18385.0 19272.0 15903.4 275806.1 352661.8 1300 237.6 934.6 6304.3 15570.7 22714.6 1219.7 134418.2 181415.5 1400 116.2 2773.3 9989.8 6112.9 5575.7 6214.6 98547.2 129315.1 1500 0.0 3115.2 5874.0 79.2 303.6 16684.8 8883.6 34953.6 1600 0.0 5109.7 203.3 27.7 3141.6 628.3 11938.1 21048.7 1700 0.0 970.2 2263.8 840.8 4389.0 1968.1 23515.8 33957.0 1800 101.6 702.2 4361.3 11023.3 9600.4 2374.7 27849.4 56012.9 1900 5.3 12867.4 132248.2 2756.2 36680.2 1077.1 75081.6 260715.8 2110 14.7 539120.3 813991.9 3384.6 34886.4 11677.6 313435.6 1716511.1 2120 0.0 41759.5 92463.4 217.8 3165.4 0.0 35378.0 172984.0 2130 16.2 32060.7 54298.6 362.6 449.2 0.0 22573.5 109755.4 2140 0.0 21384.0 125809.2 7187.4 4514.4 0.0 32313.6 191188.8 2150 0.0 3688.8 11092.6 69.9 489.5 332.2 30882.7 46555.7 2156 0.0 557050.6 21732.5 0.0 0.0 347761.9 0.0 926545.0 2160 0.0 0.0 246.8 0.0 0.0 0.0 0.0 246.8 2210 0.0 298373.5 774269.8 2165.5 0.0 740.5 9245.3 1084794.5 2220 0.0 0.0 0.0 0.0 0.0 0.0 142.6 142.6 2230 0.0 0.0 629.6 21300.8 71.3 0.0 1698.8 23700.6 2410 0.0 2756.2 1758.2 2930.4 0.0 4276.8 3643.2 15380.6 2420 0.0 3433.3 35010.4 0.0 0.0 0.0 21776.0 60231.6 2430 0.0 253.4 5845.0 2534.4 237.6 0.0 4752.0 13638.2 2500 0.0 0.0 834.2 0.0 0.0 179.5 718.1 1742.4 2510 0.0 2956.8 802.6 0.0 0.0 0.0 506.9 4266.2 2520 0.0 475.2 0.0 0.0 0.0 0.0 1003.2 1478.4 2540 0.0 356.4 1201.2 0.0 0.0 0.0 1280.4 2838.0 2610 0.0 1228.9 10385.8 739.2 628.3 0.0 7419.7 20411.2 3000 270.6 26876.0 116412.1 16706.8 48323.7 1504.5 102990.4 313084.2 4000 168.3 25710.3 78516.9 11206.8 35907.3 1184.7 125756.4 278450.7 4400 0.0 52880.9 116225.1 0.0 282.3 0.0 4513.5 173901.8 5000 18746.6 2448.5 4323.1 111916.7 8135.4 851.8 8455.0 154877.2 6000 544.5 60051.4 125755.7 48496.1 42930.4 2362.1 85498.4 365638.7 7000 0.0 17648.4 20734.6 619.1 4213.4 6237.0 4749.4 54201.8 8100 72.9 8998.7 7832.9 437.2 5926.3 4007.5 32400.2 59687.8 8200 0.0 158.4 190.1 0.0 79.2 0.0 332.6 760.3 8300 7.9 3073.0 1354.3 491.0 3128.4 2122.6 6153.8 16339.0 Grand Tot a 21126.7 1755149.1 2709474.5 316315.7 469895.4 433287.9 1732127.1 7437458.4

V erification Calculated 2,709,474 lbs/year 1.54 mg/l Measured 2,468,224 lbs/year 1.41 mg/l

# 27 Table 19. Land Use Categories, Unit Load Factors, and P Reduction Factors for the Caloosahatchee Watershed Land Use Category Land Use Description FLUCCS Unit P Load

(lbs/acre/yr) Owner Implemented BMPs Typical Incentive

BMPs Alternative Practices

Residential Low Density Residential Low Density 1 1100 0.68 5% 5% 0% Residential Medium Density Residential Medium Density 2 1200 1.93 5% 5% 0% Residential High Density Residential High Density 2 1300 4.14 5% 5% 0% Other Urban Commercial/Industrial 2 1400-1800 2.05 5% 5% 0% Improved Pastures Improved Pastures 2110 1.93 11% 19% 49% Unimproved Pastures Unimproved Pastures 2120 0.99 7% 13% 44% Woodland Pastures/Rangeland Woodland/Range Pastures 2130/3000 0.40 4% 6% 35% Row Crops Row Crops 2140 3.45 30% 30% 50% Sugar Cane Sugar Cane 2156 0.55 10% 23% 52% Citrus Citrus 2210 0.90 12% 20% 42% Sod Farms Sod Farms 2420 2.79 20% 27% 50% Ornamentals Ornamentals 2430 4.00 32% 35% 50% Horse Farms Horse Farms 2510 2.51 20% 22% 49% Dairies Dairies 2520 12.94 9% 28% 48% Other Areas Other Areas 2150-2610 3.20 15% 25% 36% Tree Plantations Tree Plantations 4400 0.21 1% 10% 50% Water Water 5000 0.07 0% 0% 0% Natural Areas Forrests/wetlands/Open 4000/6000 0.11 0% 0% 0% Transportation Transportation 8100 2.28 10% 23% 52% Communication/Utilities Communication/Utilities 8200/8300 0.66 5% 5% 0% 1 Assumed on Septic 2 Assumed about 70% of Discharge from WWT outside basin Estimated Phosphorus Reduction

# 28 Table 20. Land Use Categories, Unit Load Factors, and Estimated P Reduction Factors Using 2004 Land Use for the Caloosahatchee Watershed Land Use Category Land Use Description FLUCCS Percent of Basin Unit P Load Total P Annual Cost

(lbs/acre/yr) (MT/yr) (percent) (MT/yr) ($) Residential Low Density Residential Low Density 1 1100 7.12% 0.68 23.6 10% 2.4 176,305,275 Residential Medium Density Residential Medium Density 2 1200 3.09% 1.93 29.3 10% 2.9 76,602,409 Residential High Density Residential High Density 2 1300 1.06% 4.14 21.6 10% 2.2 26,270,433 Other Urban Commercial/Industrial2 1400-1800 2.18% 2.05 21.9 10% 2.2 54,061,629 Improved Pastures Improved Pastures 2110 10.85% 1.93 102.9 30% 30.9 2,078,370 Unimproved Pastures Unimproved Pastures 2120 2.21% 0.99 10.8 20% 2.2 112,723 Woodland Pastures/Rangeland Woodland/Range Pastures 2130/3000 7.24% 0.40 14.2 10% 1.4 369,624 Row Crops Row Crops 2140 0.89% 3.45 15.1 60% 9.1 761,356 Sugar Cane Sugar Cane 2156 8.13% 0.55 22.0 33% 7.3 3,459,101 Citrus Citrus 2210 8.95% 0.90 39.4 32% 12.6 8,121,456 Sod Farms Sod Farms 2420 0.47% 2.79 6.4 47% 3.0 199,880 Ornamentals Ornamentals 2430 0.08% 4.00 1.6 67% 1.0 67,888 Horse Farms Horse Farms 2510 0.02% 2.51 0.2 42% 0.1 3,345 Dairies Dairies 2520 0.01% 12.94 0.3 37% 0.1 65,542 Other Areas Other Areas 2150-2610 1.01% 3.20 15.9 40% 6.3 193,552 Tree Plantations Tree Plantations 4400 3.94% 0.21 4.0 11% 0.4 1,204,103 Water Water 5000 12.07% 0.07 4.1 0% 0.0 0 Natural Areas Forrests/wetlands/Open 4000/6000 30.03% 0.11 16.3 0% 0.0 0 Transportation Transportation 8100 0.46% 2.28 5.1 33% 1.7 193,769 Communication/Utilities Communication/Utilities 8200/8300 0.20% 0.66 0.7 10% 0.1 1,602,248 Total Basin 100% 0.68 334 25% 84 325,402,270 1 Assumed on Septic 2 Assumed about 70% of Discharge from WWT outside basin Estimated P Reduction

# 29 Table 21. Land Use Categories, Unit Load Factors, and N Reduction Factors for the Caloosahatchee Watershed Land Use Category Land Use Description FLUCCS Unit N Load

(lbs/acre/yr) Owner Implemented BMPs Typical Incentive

BMPs Alternative Practices

Residential Low Density Residential Low Density 1 1100 7.26 15% 15% 15% Residential Medium Density Residential Medium Density 2 1200 10.56 25% 25% 15% Residential High Density Residential High Density 2 1300 15.84 30% 25% 15% Other Urban Commercial/Industrial 2 1400-1800 11.68 25% 25% 15% Improved Pastures Improved Pastures 2110 14.65 17% 10% 30% Unimproved Pastures Unimproved Pastures 2120 7.26 11% 8% 30% Woodland Pastures/Rangeland Woodland/Range Pastures 2130/3000 5.41 4% 6% 20% Row Crops Row Crops 2140 19.80 30% 30% 50% Sugar Cane Sugar Cane 2156 10.56 10% 23% 52% Citrus Citrus 2210 11.22 10% 20% 42% Sod Farms Sod Farms 2420 11.88 20% 27% 50% Ornamentals Ornamentals 2430 15.84 25% 25% 25% Horse Farms Horse Farms 2510 21.12 30% 22% 30% Dairies Dairies 2520 26.40 20% 40% 48% Other Areas Other Areas 2150-2610 10.18 15% 25% 36% Tree Plantations Tree Plantations 4400 4.09 5% 10% 25% Water Wate r 5000 1.19 0% 0% 0% Natural Areas Forrests/wetlands/Open 4000/6000 2.96 0% 0% 0% Transportation Transportation 8100 12.14 20% 23% 25% Communication/Utilities Communication/Utilities 8200/8300 7.92 30% 25% 15% 1 Assumed on Septic 2 Assumed about 70% of Discharge from WWT outside basin Estimated Nitrogen Reduction

# 30 Table 22. Land Use Categories, Unit Load Factors, and Estimated N Reduction Factors Using 2004 Land Use for the Caloosahatchee Watershed Land Use Category Land Use Description FLUCCS Percent of Basin Unit N Load Total N Annual Cost

(lbs/acre/yr) (MT/yr) (percent) (MT/yr) ($) Residential Low Density Residential Low Density 1 1100 7.12% 7.26 253.6 30% 76.1 176,608,300 Residential Medium Density Residential Medium Density 2 1200 3.09% 10.56 160.3 50% 80.2 76,781,946 Residential High Density Residential High Density 2 1300 1.06% 15.84 82.5 55% 45.4 26,332,005 Other Urban Commercial/Industrial2 1400-1800 2.18% 11.68 125.1 55% 68.8 59,607,170 Improved Pastures Improved Pastures 2110 10.85% 14.65 780.2 27% 210.7 2,078,370 Unimproved Pastures Unimproved Pastures 2120 2.21% 7.26 78.6 19% 14.9 101,987 Woodland Pastures/Rangeland Woodland/Range Pastures 2130/3000 7.24% 5.41 192.2 10% 19.2 369,624 Row Crops Row Crops 2140 0.89% 19.80 86.9 60% 52.1 761,356 Sugar Cane Sugar Cane 2156 8.13% 10.56 421.2 33% 139.0 3,484,258 Citrus Citrus 2210 8.95% 11.22 493.1 30% 147.9 16,979,257 Sod Farms Sod Farms 2420 0.47% 11.88 27.4 47% 12.9 199,880 Ornamentals Ornamentals 2430 0.08% 15.84 6.2 50% 3.1 50,663 Horse Farms Horse Farms 2510 0.02% 21.12 1.9 52% 1.0 3,584 Dairies Dairies 2520 0.01% 26.40 0.7 60% 0.4 65,542 Other Areas Other Areas 2150-2610 1.01% 10.18 50.5 40% 20.2 226,788 Tree Plantations Tree Plantations 4400 3.94% 4.09 79.0 15% 11.9 1,427,933 Water Water 5000 12.07% 1.19 70.4 0% 0.0 0 Natural Areas Forrests/wetlands/Open 4000/6000 30.03% 2.96 435.9 0% 0.0 0 Transportation Transportation 8100 0.46% 12.14 27.1 43% 11.7 256,618 Communication/Utilities Communication/Utilities 8200/8300 0.20% 7.92 7.8 55% 4.3 3,702,458 Total Basin 100% 6.72 3,298 27% 874 342,705,734 1 Assumed on Septic 2 Assumed about 70% of Discharge from WWT outside basin Estimated N Reduction