Sweetwater Creek Watershed Mgmt. Plan 2007 Update--Part 2

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CHAPTER 9 Tampa Bay Water. 2006. New Water Plan: Prepared for the Southwest Florida Water Management District. Quarterly Report. Tihansky, A.B., 1999, Sinkholes, West-Central Florida, in Galloway, D., Jones, D.R., and Ingebritsen, S.E., eds., Land Subsidence in the United States: USGS Circular 1182, p. 121-140. Univ. of South Florida. 2006. Hillsborough Water Atlas. http://www.hillsboroughwateratlas.usf.edu. USF. Tampa, FL. Water Reuse Work Group. June, 2003 rev. 05MAY2006. Water Reuse for Florida. FDEP. Tallahassee, FL. 9-19 Sweetwater Creek Watershed Management Plan
CHAPTER 10: POLLUTANT LOADING AND REMOVAL MODEL 10.1 Overview Potential water quality impacts resulting from stormwater runoff in the Sweetwater Creek watershed were evaluated using the Pollutant Loading and Removal Model previously developed by Parsons Engineering Science, Inc. in conjunction with the Hillsborough County Public Works/Stormwater Management Section. The model was developed to: • Estimate the potential water quality impacts resulting from the most current (2004) land use mapping and soils conditions • Evaluate the reduction in potential loading due to the existing best management practices (BMP) within the watershed • Evaluate future water quality conditions based on potential improvements or alternatives within a given watershed This chapter discusses the process used to delineate the areas treated by existing Best Management Practices (BMPs) and an estimate of their overall effectiveness in reducing pollutant loading within the watershed using the above-mentioned model. The gross pollutant loading within the watershed was estimated based on the 2004 land use and soils characteristics. Gross pollutant loading was estimated by assuming no treatment of stormwater runoff, and is indicative of the potential of various land uses to yield contaminants into the environment. From this gross loading, the reduction in loading due to the existing BMPs was subtracted to approximate the net pollutant loading within the watershed. Analyses were conducted at both watershed and subbasin levels. 10.2 Pollutant Loading and Removal Model The Pollutant Loading and Removal Model has three main components: calculation of gross pollutant loads, estimation of net loads based on existing treatment, and evaluation of the treatment level-of-service based on individual hydrologic units (Figure 10-1). For the purposes of these analyses, the hydrologic units of interest are the subwatershed and subbasin. In the model, land use and hydrologic soil characteristics were used to determine runoff characteristics. A gross pollutant load for each subbasin was calculated as the product of the runoff volume and the stormwater event mean concentrations (EMC) for each pollutant and land use of interest. Six EMC values were measured during previous stormwater characterization studies performed by Hillsborough County, and later submitted as part of the County's National Pollutant Discharge Elimination System (NPDES) permit. 10-1 Sweetwater Creek Watershed Management Plan
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CHAPTER 8: EXISTING NATURAL SYSTEMS
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CHAPTER 8 Using the data described
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CHAPTER 8 Table 8-2 Land Use in the
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Legend Roads Hydrography Agricultur
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CHAPTER 8 Upland coniferous forest
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CHAPTER 8 where the hydroperiod (de
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CHAPTER 8 Intermittent ponds (653)
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CHAPTER 8 Communications (820) In t
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Legend Roads Hydrography County Bou
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CHAPTER 8 Habitat Fragmentation Hab
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CHAPTER 8 8.5.3 Identification of E
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Page 31 and 32: CHAPTER 8 8.5.7 Wildlife The inform
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Page 37 and 38: CHAPTER 8 to the U.S. as experiment
Page 39 and 40: CHAPTER 8 8.5.9.2 Exotic Fauna An e
Page 41 and 42: CHAPTER 8 Hillsborough County Envir
Page 43 and 44: CHAPTER 8 8.6.2 Public Lands in the
Page 45 and 46: CHAPTER 8 High quality natural area
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Page 51 and 52: CHAPTER 8 9. My Water Activity Book
Page 53 and 54: CHAPTER 8 that addresses awareness
Page 55 and 56: CHAPTER 8 Carlisle, V.W., R.E. Cald
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Page 59 and 60: CHAPTER 8 redroot, Lachnanthes caro
Page 61 and 62: WATER SUPPLY At this point it is re
Page 63 and 64: WATER SUPPLY Southwest Florida Wate
Page 65 and 66: WATER SUPPLY 9.2 Groundwater Use Hy
Page 67 and 68: WATER SUPPLY Pumpage from Northwest
Page 69 and 70: WATER SUPPLY Figure 9-5 Rainfall an
Page 71 and 72: WATER SUPPLY 9.3 Surface Water Use
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Page 77: WATER SUPPLY 9.5 BIBLIOGRAPHY The a
Page 81 and 82: CHAPTER 10 The 12 different paramet
Page 83 and 84: Legend Roads Hydrography Agricultur
Page 87 and 88: CHAPTER 10 Table 10-3 Runoff Coeffi
Page 89 and 90: Table 10-4 Event mean concentration
Page 91 and 92: Total Phosphorus Loading Potential
Page 93 and 94: CHAPTER 10 Literature reviews perfo
Page 97 and 98: Identification of BMPs Using Digita
Page 101 and 102: CHAPTER 10 10.3 Pollutant Loads The
Page 103 and 104: Legend Roads Hydrography Subbasins
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Page 107 and 108: CHAPTER 10 Lowest loading values we
Page 109 and 110: CHAPTER 10 Generally, the two model
Page 111 and 112: WATER QUALITY TREATMENT LEVEL OF SE
Page 113 and 114: Note: Results of the NPS Pollutant
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Page 117 and 118: WATER QUALITY TREATMENT LEVEL OF SE
Page 119 and 120: CHAPTER 12: PUBLIC MEETING The firs
Page 121: CHAPTER 12 Following the Hillsborou
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Sweetwater Creek Watershed Mgmt. Plan 2007 Update--Part 2

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