North Port/Big Slough Watershed Management Plan City Commission Workshop - July 17, 2007 City of North Port, Florida Southwest Florida Water Management District Ardaman & Associates, Inc.
North Port/Big Slough Watershed Management Plan SWFWMD Watershed Management Program Methodology to evaluate a watershed’s capacity to protect, enhance and restore water quality and natural systems, while achieving flood protection. Measures effectiveness of strategies and goals to reach a desired watershed condition through assisted decision-making using data analysis, modeling, projections and evaluation.
North Port/Big Slough Watershed Management Plan SWFWMD Watershed Management Program - Major Tasks Project Development Digital Topographic Information Watershed Evaluation and Reconnaissance Comprehensive Watershed Management Plan Development Includes: Flood Mitigation & Mapping Water Quality Enhancement Hydrologic/Environmental Enhancement Model Updates and Geodatabase Management Technical Reviews of Other CWM Watershed Models
North Port/Big Slough Watershed Management Plan SWFWMD Watershed Management Program - Major Tasks Project Development Digital Topographic Information Watershed Evaluation and Reconnaissance Comprehensive Watershed Management Plan Development Includes: Flood Mitigation & Mapping Water Quality Enhancement Hydrologic/Environmental Enhancement Model Updates and Geodatabase Management Technical Reviews of Other CWM Watershed Models
North Port/Big Slough Watershed Management Plan Digital Topographic Information Tasks: Digital Terrain Model (DTM) Development Assembles: Conventional Topographic Data Light Detection And Ranging (Li. DAR) Supplemental Survey & As-Built Data Breaklines along Ridges & Streams Breaklines on Initial Water Surface Boundaries Triangular Irregular Network (TIN) Development Digital Elevation Model (DEM) Development Quality Control and Terrain Model Verifications
North Port/Big Slough Watershed Management Plan Digital Topographic Information Some Terrain Model Uses: Sub-basin/Watershed Delineations Travel Time Computation for Tc Node Storage Area Calculation Generalized Channel Sections (typically used in remote, offsite areas) Automated Overflow Weir Sections (model as weirs on shared basin divides) Automated Floodplain Delineation
North Port/Big Slough Watershed Management Plan Watershed Evaluation Tasks: Data Assembly, Evaluation and Processing Desktop and Field Reconnaissance DTM, TIN & DEM Refinement Hydrologic & Hydraulic Feature Inventory Surface Water Assessment Approach Development Technical Source Data Notebook (TSDN)
North Port/Big Slough Watershed Management Plan Watershed Evaluation Tasks: Data Assembly, Evaluation and Processing Desktop and Field Reconnaissance DTM, TIN & DEM Refinement Hydrologic & Hydraulic Feature Inventory Surface Water Assessment Approach Development Technical Source Data Notebook (TSDN)
North Port/Big Slough Watershed Management Plan Watershed Evaluation
North Port/Big Slough Watershed Management Plan Watershed Evaluation
North Port/Big Slough Watershed Management Plan Watershed Evaluation
North Port/Big Slough Watershed Management Plan Watershed Evaluation
North Port/Big Slough Watershed Management Plan Watershed Evaluation DEM Reconditioning Using As-Built Information
North Port/Big Slough Watershed Management Plan Watershed Evaluation
North Port/Big Slough Watershed Management Plan Tasks: Geodatabase Refinement & Specific Use Parameterization Model Development, Testing and Verification Event Simulations and Floodplain Mapping (+ 45 day review) Digital Flood Insurance Rate Map (DFIRM) Generation Level of Service (LOS) Evaluation Surface Water Resource Assessment BMP Development & Conceptual ERP Application(s)
North Port/Big Slough Watershed Management Plan Tasks: Geodatabase Refinement & Specific Use Parameterization Model Development, Testing and Verification Event Simulations and Floodplain Mapping (+ 90 day review) Digital Flood Insurance Rate Map (DFIRM) Generation Level of Service (LOS) Evaluation Surface Water Resource Assessment BMP Development & Conceptual ERP Application(s)
North Port/Big Slough Watershed Management Plan Candidate Historical Rainfall Events for Model Verification : March 23 -31, 1987 5. 4 to 9. 1 inches September 5 -9, 1988 8. 2 to 8. 9 inches June 23 - July 2, 1992 16. 2 to 20. 7 inches September 14 -23, 2000 4. 7 inches July 20 -26, 2001 6. 9 to 4. 6 inches September 6 -14, 2001 10. 0 to 11. 0 inches June 17 -22, 2003 14. 3 to 13. 6 inches August 12 -19, 2004 3. 0 to 4. 5 inches Maximum 5 -day rainfall volumes within period of interest at STN 334 and STN 336
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan Tasks: Geodatabase Refinement & Specific Use Parameterization Model Development, Testing and Verification Event Simulations and Floodplain Mapping (+ 90 day review) Digital Flood Insurance Rate Map (DFIRM) Generation Level of Service (LOS) Evaluation Surface Water Resource Assessment BMP Development & Conceptual ERP Application(s)
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan Tasks: Geodatabase Refinement & Specific Use Parameterization Model Development, Testing and Verification Event Simulations and Floodplain Mapping (+ 90 day review) Digital Flood Insurance Rate Map (DFIRM) Generation Level of Service (LOS) Evaluation Surface Water Resource Assessment BMP Development & Conceptual ERP Application(s)
North Port/Big Slough Watershed Management Plan Best Management Practices: Protect and Enhance Water Resources - Flood Protection - Natural Systems - Water Quality - Water Supply
North Port/Big Slough Watershed Management Plan Types of BMPs: Structural Watershed management system infrastructure Construction of improvements Maintenance and restoration Non-Structural Building Code Floodplain ordinance Stormwater management ordinance Acquisition of flooding easements
North Port/Big Slough Watershed Management Plan
North Port/Big Slough Watershed Management Plan SWFWMD Watershed Management Program - Major Tasks Project Development Digital Topographic Information Watershed Evaluation and Reconnaissance Comprehensive Watershed Management Plan Development Includes: Flood Mitigation & Mapping Water Quality Enhancement Hydrologic/Environmental Enhancement Model Updates and Geodatabase Management Technical Reviews of Other CWM Watershed Models
North Port/Big Slough Watershed Management Plan City Commission Workshop - July 17, 2007 Questions and Comments • MODEL DEVELOPMENT • 100 -YR FLOODPLAINS • SW LEVEL OF SERVICE • BMP ALTERNATIVES City of North Port, Florida Southwest Florida Water Management District Ardaman & Associates, Inc.
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