Louisiana Watershed Resiliency Study (LaWRS) Shona Gibson February 27, 2017

Transcription

1 Louisiana Watershed Resiliency Study (LaWRS) Shona Gibson February 27,

2 Background In response to flood events in 2016, watershed analysis and planning became a priority for state and local leaders Provide data and analysis to: Aid state and local agencies in developing strategies by watershed Inform Long Term Recovery Strategy and Planning on a Local and Community level Prioritize mitigation projects throughout the state Compiling relevant date from variety of sources Identify priority watersheds for mitigation projects and for potential storm water management activities/modeling Coordinate with State and Federal Agencies and local jurisdictions Develop strategies to reduce risk and increase resiliency based on needs of the state and other stakeholders 2

3 Watershed assessments: Provide data driven report and products to aid state in developing strategy to develop funding strategy for federal grant funds. Comprehensive evaluation of the conditions, issues and unmet needs in areas affected by chronic, severe or episodic flooding. Describes impacts on infrastructure buildings, population on the river and its watershed. Evaluates the past and ongoing impacts of flood, storms and climate on people and neighborhoods to illustrate where watershed planning investments can prevent or reduce the disruption and cost of these natural events Watershed assessments are not: Hydrological or Hydraulic assessment or models on the watershed or any of it s tributaries 3

4 What is LaWRS? A framework to make decisions and guide efforts to protect and restore Louisiana watersheds A list of observations Focus on flood risk reduction and resilience Emphasis on communities Expanded outreach and community engagement 4

5 Background Proposed Watersheds watersheds affected in March flooding (DR LA) 15 watersheds affected in August flooding (DR LA) 27 unique watersheds affected; 5 watersheds affected in both events USGS flood extents & depth grids used for analysis in March flooding Region VI s flood extents & depth grids used for analysis in August flooding 5

6 4 - Population Louisiana (2010 Census, Act) Louisiana (2016 Est.) 4.53 mil 4.68 mil Watersheds 27 (2010 Census) 3.20 mil (68.4%) Top 5 Amite 568.9K Vermilion 365.3K Bayou Teche 227.2K Liberty Bayou- Tchefuncte 207.4K Bayou Pierre 192.7K 1.56 mil (48.8%) 6

7 Background Flooded Structures Use Inside SFHA Outside SFHA Total % Residential 12,099 61,670 18,897 39, , % Non- Residential 1,226 6,637 1,920 3,138 12, % Total 13,325 68,307 20,817 42, , % 7

8 Background Flooded Structures SFHA Depth ft. 4,798 17,113 In 1-3 ft. 5,889 26,015 > 3 ft. 2,638 25,179 Subtotal 13,325 68, ft. 11,104 24,640 Out 1 3 ft. 7,499 14,690 > 3 ft. 2,214 2,856 Subtotal 20,817 42,186 TOTAL 34, ,493 8

9 Stakeholders FEMA GOHSEP DOTD DHS (Office of Infra- structure Protection) Office of Cyber Infra- strucure Analysis (OCIA) EPA EPA OCD Primary Planning Team Secondary USDA CPRA USACE (NO) Outreach Dept. of Interior USACE (other districts) NOAA 9

10 Authorities Watersheds 27 Sub- Watersheds 668 Parishes 53 Other Jurisdictions 211 Levee Districts 10 USACE Districts 4 Planning Commissions 8 10

11 Framework Process 1. A Framework (Criteria) was determined The Framework items were rated by importance 2. This Framework was presented to GOHSEP for input on priorities 3. From this input, Primary and Secondary framework groups were established 4. Each framework is being assessed on: What will be displayed (GIS product, charts, narrative, table, etc.) Components Reference/source (when and where the information was derived) Rationale (what is important and how it benefits the stakeholder) Answer the question, So What? 5. Prototype products are being vetted by GOHSEP 11

12 Process Framework Primary % Of Structures Impacted Land Cover Changes Upstream Watersheds Population NFIP Claims IA Applicants Levee/Dams/Flood Control Transportation Channel Conditions H&H Analysis Critical Facilities %of WS in Floodplain Previous Disaster Grants (404 & CDBG) Non- Disaster Grant Funding Secondary Emergency Facilities Geology/Topography Wetlands Water Quality/EPA/Water Wells Economics Endangered Species Soils Energy Infrastructure Parks and Recreation Historic Places/Districts Tribal Lands Climate and Precipitation Income Census Building Codes/Freeboard 12

13 Geospatial Products A list of geo- products was developed based on the framework criteria. Prototype products are developed for each framework criteria. GOHSEP approves prototype products which are batched out to GIS assets, to produce products for the balance of the watersheds. 13

14 GIS Product Lists Louisiana Watershed Resiliency Study (LaWRS) TM 1 = JH GIS Product Lists as of: TM 2 = CC Description Reqd Compl Bal % Comp Comments Res. TM 1 Watershed/Subwatershed % Exhibit 4, Dupage HH SR 2 Snapshot % Adj Claims as reqd DA/CD SR 3 % of Structures Impacted % HH 2 4 Land Use Changes % 2 5 Existing Master Plans/Community Plans % 2 6 Upstream Wetlands % 2 7 Population % Snapshot DA 2 8 NFIP Claims % 2 8 NFIP Claims % 2 8 IA Registrations % 2 8 IA Registrations % 2 9 Levees / Dams / Flood Control Structuces % 2 10 Transportation Network % 2 11 Channel Conditions % Divided in Cats H&H Studies % 1 13 Critical Facilities % 2 14 Emergency Facilities % DA 2 15 % of Floodplain/Flooding % 1 15 Social Vulnerability Index % 1 16 Previous % DA 1 17 Non- Disaster Grants/Other Agency Grants % DA 1 19 Geology/Topography % 1 20 Wetlands % 1 21 Water Quality / EPA / Wells % 2 22 Economics % DA 2 23 Endangerd Species % 1 24 Soils % 1 25 Energy Infrastructure % DA 1 26 Pipeline (Petroleum) % DA 1 27 Wells (Petroleum) % DA 1 28 Parks & Recreation % 1 29 Climates and Precipitation % HH 1 30 Building Codes / Free Board % 2 31 Census % % 14

15 GIS Products 15

16 GIS Products 16

17 GIS Products 17

18 Phased Development Proposed Timeline Phase I Data Collection December January Phase II Task / Deliverables February ` March 2 weeks 2 weeks 2 weeks 2 weeks Finish Analyze Develop Review Gathering Organize Report Report Phase III Planning for Implementation April Data Data 18

19 Phased Development Proposed Timeline February March April 2 weeks 2 weeks 2 weeks 2 weeks 2 weeks Complete Analyze Developing Review Report Gathering Organize Report Report Data Data 19

20 Outreach Acadiana Planning Commission (2/6) USACE (ONGOING) Red River Valley Association (2/14) CPRA Briefing 2017 Louisiana s comprehensive Master Plan for a Sustainable Coast (2/20) USGS Brief on DR Report Results (2/21) NOAA C- Cap Land Use & Land Change for 18/27 Watersheds (1/21) EPA Outreached to FEMA LaDOTD - For future projects FEMA Region VI Federal Accreditation Status Tracker Flood Provisions of the International Codes and ASCE 24 (6 workshops, 6 locations, over 400 attendees, 2/7-14) Office of Cyber Infrastructure Analysis (02/26) Capital Area Planning Commission TBD OEP Directors (3/13) 20

21 Outreach/Engagement Strategy (Under Development) Stake Holders Parishes Municipalities Planners Floodplain Managers Viewer Map Journal FEMA s Geo Platform Story Map (ARCGIS) Survey Visual Resource to Display Research Observations 21

22 Outreach Community Survey FOR: Parishes Incorporated Communities Communities to Input Specific Data MAP JOURNAL (GEO PLATFORM) House the Data to Access Accessible For all Jurisdictions Jurisdictions Planning & Districts State STORY MAP Public Outreach Tool 22

23 Survey Form 23

24 What we need Significant and useful input from local communities, planning districts, levee districts, River Basins, etc. is key to formulate a complete assessment. Input desired: Areas that flood Known nuisance flooding Poor or insufficient drainage issues Flooding Sources that may need updated engineering and Floodplain Mapping Planned Drainage Projects Channel Conditions Zoning/Land use plans Infrastructure Plans Storm water management practices H&H Studies 24

25 Outcomes Watershed assessment will help describe: Structure and infrastructure impacts from recent flood events Flooding Unmet needs Resilient features Impairment Significant natural areas, storage areas, and wetlands 25

26 Outcomes Cont. Watershed Assessment can help identify: Funding Priorities for Federal Disaster Recovery Funds Mitigation Actions Flood resilience actions for most impacted/most distressed areas Long Term Recovery strategy and priorities Structural and non structural water quality improvements The need/desire to update floodplain maps 26

27 Decision Drivers Reducing risks: Life Property Resilience Individual Community Sustainable communities Economic growth Regional storm water management / planning 27

28 Tomorrow s Floodplain is here TODAY! 29

29 Questions? 30