Status Report on the Re-evaluation of the Louisiana
Status Report on the Re-evaluation of the Louisiana Coastal Zone Boundary Dr. John Day 08C022009B December 9, 2009 1 PROJECT OVERVIEW Technical and Analytical Support Services to the
Office of Coastal Management for Re-evaluation of the Inland Boundary of the Louisiana Coastal Zone. Task 1 Data Acquisition and Background Review Task 2 Development of Methodology, Data Compilation and Analysis Stakeholder input 08C022009B Task 3 Data Interpretation and Report Preparation 2
One hundred year flood and tidal inundation level Point Location Correlative Criteria 08C022009B Salinity = inland intrusion Range or inland occurrence of brackish water clam, blue crab, fish (e.g., Striped mullet), birds (migrating waterfowl), mammals (e.g., Eastern mole), reptiles (e.g., Fence lizard) 3
2009 Boundary Criteria 08C022009B 4
Vegetation Current elevation Predicted subsidence/sea level rise Inundation - storm surge Watershed boundaries Boundaries of existing coastal programs Methodology An updated inland Coastal Zone Boundary should encompass: all areas subject to coastal processes; and all uses which have the potential to impact coastal waters
08C022009B The degree of management needed will vary by location and use Therefore, a tiered approach is proposed, with each tier defined by science based parameters and criteria to determine regulatory and nonregulatory policies and management scenarios 5 Proposed Tiered Approach TIER 1: Regulation by means of the
Coastal Use Permitting Procedure TIER 2: Regulatory oversight by means of the Consistency Determination Procedure 08C022009B TIER 3: Non-regulatory management through incentive programs and planning initiatives 6 Tiering Criteria Based on Area and Use
08C022009B Some of the factors that affect tiering criteria include Potential effect on coastal waters Nature of proposed land or water use Federally excluded lands (e.g., fastlands, federally-owned lands) Deepwater port, harbor, or terminal district Current land use Elevation (sea level rise, storm surge)
State of LA? Watershed that touches the coast? Area of other LA coastal programs? Area of inundation per MOMS/ADCIRC? Affected by sea level rise (<8 ft)? Below the Pleistocene Terrace? Intermediate, brackish, saline marsh? Freshwater wetland in certain circumstances? 08C022009B Contiguous to marsh in the current coastal zone
Adjacent to water body with tidal influence 9 Watershed that Touches the Coast 08C022009B Activities within these watersheds can have a direct
impact on coastal waters Area of Inundation per Hydrologic Modeling (e.g., MOMS, ADCIRC) 08C022009B Worst case scenario of storm surge Will encompass
areas subject to coastal processes in extreme events 11 12 08C022009B Historical Global Sea Level Rise
08C022009B Additional 3 ft by 2100 08C022009B Area Vulnerable to Sea Level Rise 3 ft expected sea level rise over next century Area below 5 ft may become
wetland Whats 8 ft now will be 5 ft by end of century 08C022009B Chenier Plain 15 08C022009B
Bayou Lafourche 16 08C022009B North Shore 17 Adjustment of CZB 08C022009B
Political boundaries (e.g., parish boundary) Geographic boundaries (e.g., road) Watershed boundaries (12-digit watershed code per NRCS) Socioeconomic factors Energy and infrastructure, marine commerce, coastal recreation, cultural factors, etc. Questions? http://dnr.louisiana.gov/crm/
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