NC FIMAN - NCBIWA · 2019-05-01 · NC Flood Warning Program Timeline. 1999 •Hur. Floyd •52...
Transcript of NC FIMAN - NCBIWA · 2019-05-01 · NC Flood Warning Program Timeline. 1999 •Hur. Floyd •52...
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NC FIMANHurricane Florence Success Stories and
Future VisionApril 30, 2019
Tom Langan, PE, CFM, North Carolina Division of Emergency Management
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The Genesis 1999… Hurricane Dennis followed by Floyd
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NC Flood Warning Program Goals
• Real-time flood inundation mapping (current and forecast)
• Alerts• Leverage vast investment in data• Assist in risk-based decisions during and
before disaster• Prevent and reduce the loss of lives and
property
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NC Flood Warning Program Timeline
1999•Hur. Floyd
•52 deaths
2003•NOAA Grant(s)
•Eastern basins
•Initial Site
2006•NC Funding
•Western growth
2007•More Libraries
•NC Gages
2008•IHRMProject
•100% digital
•Building level risk
2011•Coastal Gages
•Coastal Libraries
2013•NEXFIM•Pilot Project
2016•FIMAN 2.0
•Hur. Matthew
2017•New Sites
2018•Hur. Florence
•New Sites
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What is FIMAN?
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What is an Inundation Library?
“Library” of flood inundation mapping near gaging stations
+ Gaging Stations+ Telemetry+ Pre-made inundation libraries+ Web tool to efficiently
communicateReal-time flood mapping solution
N. Fork Catawba River @ HWY 221
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Site Login
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Home Screen / Current Severity
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Gage Search Options
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Dashboard Concept
• Three Tabs– Current: Provides most recent gage data– Scenario: Planning tool for visualization and
impact– Forecast: Shows timeline using NWS forecast data
• Info Widgets– Interactive for stage, flow, forecast, impacts
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Current Inundation Level and Flow
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Gage Stage Charts + Forecast
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Flood Impacts/Damages
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Flood Scenario Mode
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Forecast
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Gage Summary Reports
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Statewide Reports
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Real Time Alerts
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Hurricane Florence – September 2019FIMAN in Action
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Rainfall Depths and Return Periods
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Vital Component of EOC Operations
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9/14/18: Florence Makes Landfall
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9/14/18: Rivers Rising with Forecasts
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9/15/18
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9/16/18
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9/17/18
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9/23/18
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9/27/18
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Support Federal Disaster Declaration
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Hurricane Florence:Ground Truth Testing
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NOAA Imagery 9/19
Contentnea Creek at Hookerton: 9/19
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FIMAN Inundation 9/19NOAA Imagery 9/19
Neuse River at Goldsboro
(9/19/18)
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State Disaster Recovery Act of 2018• Install 22 new Riverine and 3 Coastal
radar gages – generate inundation map libraries and risk calculations
• Extend inundation libraries and risk modeling for 20 existing gages
• Develop inundation libraries at 30 existing gages that currently do not have inundation libraries
• Install 3 riverine and 12 coastal ultrasonic low cost water level sensors at high risk bridges and culverts
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FIMAN Build Out• 5-yr plan designed to increase FIMAN coverage for municipalities across the state• Ranked and Prioritized 320 new gages
• Flood warning for critical infrastructure and roadway overtopping
Drainage Area Bridge ConditionFreeboard Average Daily Traffic
Critical Facilities Impacted Buildings
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North Carolina Emergency Management
North Carolina Floodplain Mapping Program
Effective Post 2013 – 24
Ready for LFD – 7
Revised Preliminary – 10
Preliminary – 0
Approved for Preliminary –12
Flood Database Review – 9
H&H Review – 12
In Survey – 12
FY18 Funding – 3
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North Carolina Emergency Management
NCFMP 2019 status
RiskMAP PMR effective issuances: 114 countiesRiskMAP Countywide effective issuances: 24 countiesRiskMAP 2019 estimated countywide LFD issuances:19
countiesRiskMAP 2019 estimated countywide preliminary
Releases: ~19 counties
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North Carolina Emergency Management
Sea Level Rise/Climate Change: Not Factored In
DFIRMs are based on existing shoreline characteristics, and wave and storm climatology at the time of study
By current Code of Federal Regulations, we cannot map flood hazards based on anticipated future sea levels or climate change.
In 2012 Congress directed FEMA to establish a Technical Mapping Advisory Council to provide recommendations on future flood hazard mapping guidelines—including recommendations for future mapping conditions, the impacts of sea level rise and future development. FEMA will be required to incorporate future risk assessment in accordance with the recommendations of the Council.
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North Carolina Emergency Management
NFIP Flood Maps and Stormwater Mgmt.Flood Insurance Rate Maps (FIRM) show the
flood risk for drainage areas greater than 1 sq. mile (rural areas), and 0.5 sq. miles for urban areas.
Not mapping areas less than these threshholds, but many communities report these areas have
repetitive floodingNFIP does encourage communities to adopt
higher development standards, and rewards them with reduced premiums if participating in the Community Rating System (86 in NC)
Properties outside SFHA have more difficulty getting mitigation grants to remove or elevate, as the Benefit/Cost is harder to justify.
Statistics of Note23% of NFIP Policies
are for bldgs. outside the SFHA
25% of all claims come from these buildings
80% of properties damaged during Floyd were outside the SFHA
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North Carolina Emergency Management40
State Hazard Mitigation Planning• Flood Insurance Rate Maps (FIRMs)supports
local level planning:• Supporting the development of local hazard
mitigation plans.• Flood Risk mapping for vulnerability assessments, including
building footprints, first floor elevations, damage calculations, identification of ‘Hot Spots’ of building in harm’s way, and Risk Mitigation Tool (to facilitate the development of Hazard Mitigation Plans)
• Providing technical assistance and training to local governments to assist in applying for HMGP grants; and
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North Carolina Emergency Management41
State Hazard Mitigation Planning• Risk Management supports local level
planning:• Supporting the development of local hazard
mitigation plans.• Flood Risk mapping for vulnerability assessments, including
building footprints, first floor elevations, damage calculations, identification of ‘Hot Spots’ of building in harm’s way, and Risk Mitigation Tool (to facilitate the development of Hazard Mitigation Plans)
• Providing technical assistance and training to local governments to assist in applying for HMGP grants; and
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North Carolina Emergency Management
Building Resilient Communities Through Action
Best Management Practices
Land Use Ordinances
Local Building Codes
Mitigation Projects
Community Identified Mitigation Programs
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North Carolina Emergency Management
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North Carolina Emergency Management
Property Protection Mitigation MethodsModify existing structures/ infrastructure to protect
from hazards or remove from hazard area
Examples:Acquisition/RelocationElevationRetrofitsFloodproofingStorm shutters
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North Carolina Emergency Management
Strategies To Mitigate Flood Risk:1. Identification of mitigation goals—broad
statements achieved through implementation of specific actions including implementation of polices as well as projects
2. Identification, consideration and analysis of available mitigation measures (actions) to achieve goals
3. Selection and prioritization of specific mitigation actions to be pursued
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North Carolina Emergency Management
Resilient redevelopment Plans• 50 counties • 949 Actions identified• Infrastructure actions > 50% of projected
number of strategies and total costs
• Over $2 Billion for Action Costs• Stormwater Mgmt. is #1 project type,
which accounts for nearly 20% of total costs ($397.6 M)
• Approximately 95,000 structures damaged
• Approximately 59,000 in the SFHA
• Approximately 17,000 substantially damages structures
USAR teams search for home survivors (FEMA)