Myakka River Comprehensive Watershed Management Plan
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Myakka River Comprehensive Watershed Management Plan (Myakka River State Park Staff Photo) 2004 Myakka River Comprehensive Watershed Management Plan September 2004 Prepared by: Southwest Florida Water Management District 2379 Broad Street Brooksville, Florida 34604 Cover photo: Lakeshore of Upper Myakka Lake in Myakka River State Park. A map atlas was published (2001) to accompany a previous (unpublished) version of this plan. This plan was developed to be a stand-alone document. The District does not discriminate upon the basis of any individual's disability status. Anyone requiring reasonable accommodation under the ADA should contact the Planning Department at 352-796-7211 or 1-800-423-1476 (Florida only), extension 4400; TDD ONLY 1-800-231-6103 (Florida only); FAX 352-754-6749/SUNCOM 663-6749. Table of Contents Chapter 1 Introduction 1-1 1.1 Comprehensive Watershed Management 1-1 1.1.1 Coordination with Local Governments and other Agencies 1-3 1.1.2 Implementation 1-4 1.1.3 Future of CWM – A Watershed-based Partnership Approach 1-4 1.2 District Mission and Goals 1-5 1.2.1 Areas of Responsibility and Goal Statements 1-6 Chapter 2 Watershed Description 2-1 2.1 Location 2-1 2.2 Climate 2-1 2.3 Physiography and Soils 2-3 2.4 Surface Water Features 2-4 2.4.1 Streams 2-6 2.4.2 Lakes 2-7 2.5 Hydrogeology 2-7 2.6 Socio-economics 2-9 2.6.1 Population 2-9 2.6.2 Economy 2-10 2.6.3 Tourism 2-10 2.7 Land Use, Growth and Development 2-11 2.7.1 Urban Development 2-11 2.7.2 Natural Environment and Native Ecosystems 2-12 2.7.3 Agriculture 2-15 2.7.4 Transportation 2-16 Chapter 3 Water Supply 3-1 3.1 Introduction 3-1 3.1.1 Hydrologic Setting 3-1 3.1.2 The Southern Water Use Caution Area 3-1 I 3.1.3 Water Use, Reuse and Conservation 3-2 3.1.4 Public Water Supply Facilities in the Watershed 3-4 3.2 Studies, Reports and Data 3-5 3.2.1 Previous Studies 3-5 3.2.2 Information and Additional Data 3-6 3.3 Regulatory Framework 3-7 3.3.1 SWFWMD Regulations 3-8 3.3.2 Florida Department of Environmental Protection Regulations 3-10 3.4 Other Resource Protection Initiatives 3-10 3.4.1 Southern Water Use Caution Area Recovery Strategy 3-10 3.4.2 Regional Water Supply Plan 3-11 3.4.3 Peace River/Manasota Regional Water Supply Authority 3-13 3.4.4 Water Planning Alliance 3-14 3.4.5 District Funding Programs 3-14 3.5 Water Supply Issues 3-15 3.5.1 Environmental Constraints on Groundwater Supplies 3-15 3.5.2 Protection of the Myakka River 3-16 3.5.3 Linking Land and Water Planning 3-17 Chapter 4 Flood Protection 4-1 4.1 Introduction 4-1 4.1.1 Overview of Surface Water Drainage 4-2 4.2 Studies, Reports and Data 4-3 4.2.1 Previous Studies 4-3 4.2.2 Information and Additional Data 4-6 4.3 Regulatory Framework 4-11 4.3.1 District Regulations 4-11 4.3.2 Florida Department of Environmental Protection Regulations 4-11 4.3.3 Local Government Regulations 4-11 4.4 Other Resource Protection Initiatives 4-13 4.4.1 Land Acquisition Programs 4-14 II 4.4.2 Land Use Regulation 4-14 4.4.3 Emergency Management 4-14 4.5 Flood Protection Issues 4-15 4.5.1 Data Management 4-16 4.5.2 Ownership, Responsibility, Maintenance and Operation of Flood Management Systems 4-17 4.5.3 Watershed Management Programs and Flood Prone Area Analysis 4-18 4.5.4 Infrastructure Management Policies, Regulation and Programs 4-19 4.5.5 Funding Sources for Flood Management Programs 4-20 4.5.6 Flood Management Awareness 4-22 4.5.7 City of North Port Stormwater Management 4-22 Chapter 5 Water Quality 5-1 5.1 Introduction 5-1 5.1.1 Water Quality Overview 5-1 5.2 Studies, Reports and Data 5-2 5.2.1 Previous Studies 5-2 5.2.2 Information and Additional Data 5-3 5.3 Regulatory Framework 5-6 5.3.1 Surface Water Classifications 5-6 5.3.2 State Water Quality Goals and Criteria 5-7 5.3.3 Total Maximum Daily Loads 5-8 5.3.4 Outstanding Florida Water Designations 5-9 5.3.5 Domestic and Industrial Point Source Discharges 5-9 5.3.6 Disposal of Domestic Wastewater Residual, Septage and Food Establishment Sludge 5-10 5.4 Other Resource Protection Initiatives 5-10 5.4.1 Myakka River State Park 5-10 5.4.2 Gasparilla Sound-Charlotte Harbor Aquatic Preserve 5-11 III 5.4.3 Surface Water Improvement and Management Program – Charlotte Harbor 5-11 5.4.4 Upper Myakka River Watershed 5-13 5.4.5 Facilitating Agricultural Resource Management Systems 5-13 5.4.6 North Port Public Works Department 5-14 5.4.7 Manatee County Environmental Management Department – Regional Ambient Monitoring Program 5-14 5.4.8 Florida Department of Environmental Protection Watershed Management Program 5-15 5.5 Water Quality Issues 5-16 5.5.1 Cultural Eutrophication 5-16 5.5.2 Potential Impacts of Pesticide Use in Watershed 5-17 5.5.3 Coordination of Water Quality and Point Source Discharge Monitoring Programs 5-18 5.5.4 Potential Water Quality Impacts Resulting from Lands Platted Prior to Stormwater Regulations 5-19 Chapter 6 Natural Systems 6-1 6.1 Introduction 6-1 6.1.1 Overview of River Area 6-2 6.2 Studies, Reports and Data 6-4 6.2.1 Previous Studies 6-4 6.2.2 Additional Information and Data 6-10 6.3 Regulatory Framework 6-11 6.4 Other Resource Protection Initiatives 6-12 6.4.1 Land Acquisition 6-12 6.4.2 Myakka Wild and Scenic River Designation 6-19 6.4.3 Charlotte Harbor National Estuary Program 6-19 6.4.4 Surface Water Improvement and Management Program 6-20 6.4.5 Establishment of Minimum Flows and Levels and Approved Priority List and Schedule 6-21 IV 6.4.6 Facilitating Agricultural Resource Management Systems 6-21 6.4.7 Citizen and Private Support 6-22 6.5 Natural Systems Issues 6-22 6.5.1 Habitat Loss and Fragmentation 6-22 6.5.2 Biodiversity and Wildlife Protection 6-25 6.5.3 Hydrologic Stress and Tree Mortality in the Upper Myakka River Watershed 6-26 Acronyms A-1 References R-1 V List of Figures Figure 1-1 CWM Watersheds 1-2 Figure 1-2 Decision Support System Flowchart 1-3 Figure 2-1 Myakka River Watershed 2-2 Figure 2-2 1999 Land Use and Land Cover in the Myakka River Watershed 2-13 Figure 4-1 FEMA Flood Zones in the Myakka River Watershed 4-8 Figure 5-1 U. S. Geological Survey Gage Locations 5-5 Figure 6-1 District Lands in the Myakka River Watershed (2004) 6-16 List of Tables Table 2-1 Resident Population Estimates and Projections 2-9 Table 2-2 1999 Land Use and Land Cover for the Myakka River Watershed 2-12 Table 2-3 2010 Generalized Future Land Use for the Myakka River Watershed 2-14 Table 2-4 Natural Systems in the Myakka River Watershed 2-15 Table 3-1 Estimated Water Use in Charlotte, Manatee and Sarasota Counties 3-3 Table 3-2 Reuse Information for Charlotte, Manatee and Sarasota Counties 3-4 Table 3-3 Water Demand Projections by County 3-12 Table 6-1 District Land Acquisition in the Myakka River Watershed 6-15 VI Chapter 1 ~ Introduction (Photo by: Larry Arrington from Myakka River State Park Website) High Water at Myakka River State Park ~ Naturally occurring tannins stain the water of many Florida rivers.~ Chapter 1 Introduction 1.1 Comprehensive Watershed Management The Comprehensive Watershed Management (CWM) initiative was established to improve the management of water and related natural resources within the Southwest Florida Water Management District (District or SWFWMD). This initiative employs a watershed-based approach to resource management. Staff from several disciplines and departments comprise the "watershed teams" that have been assigned to eleven primary watersheds (Figure 1-1). Local governments and other stakeholders within each watershed are also significant partners on these teams. The goals for the teams include: • Collect, integrate and analyze the existing information pertinent to each watershed and create a data base for analytical purposes; • Identify and prioritize existing and future water resource management issues relating to water supply, flood protection, water quality and natural systems (District Areas of Responsibility or "AORs"); • Develop preventative or remedial management actions to address these resource management issues; • Identify funding sources and partnerships to support action plan projects; • Implement and monitor the effectiveness of selected actions and the overall process and recommend potential revisions. CWM provides an opportunity to enhance coordinated action between the District, local governments and others. It is a science-based approach, including the application of Geographic Information System (GIS) technology and other modeling tools within each watershed. Each team has been charged with the development of a watershed management plan reflecting the results of this process. The CWM watershed plans are complex in the breadth and variety of issues that they encompass, but simple in intent and design.