This document discusses the California Coastal Analysis and Mapping Project (CCAMP) Open Pacific Coast Study, which aims to re-study and re-map coastal flood risks along California's open Pacific coastline. The study will be conducted in two phases from 2010-2014, analyzing 15 counties to determine new flood maps and flood risks. The study methods will involve analyzing deepwater wave data, nearshore wave transformation, and 1D transect analysis of coastal hazards like wave setup, runup, and bluff/dune erosion to produce new floodplain maps and flood risks.
1. by
Justin Vandever, PE, AECOM Oakland
Darryl Hatheway, CFM, AECOM San Diego
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2. CCAMP / OPC Study
Agenda
• FEMA Risk MAP and NFIP
• Introduce CCAMP Open Coast Study
• Process & Schedule of Studies
• Coastal Data and Resources
• Study Methods & Scope
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3. Vision
Risk Mapping, Assessment and Planning (Risk MAP) Vision:
To deliver quality data that increases public awareness and leads to action that
reduces risk to life and property
Goals
FEMA will collaborate with federal, state,
and local stakeholders to achieve the
following goals under Risk MAP:
Address gaps in flood hazard data
Ensure public awareness through outreach
Lead and support hazard mitigation planning
Provide an enhanced digital platform
Align risk analysis programs
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4. CCAMP / OPC Study
A Risk MAP project with a coastal focus
California
Coastal Analysis and Mapping Project
Open Pacific Coast Study
Re-study all California Re-map the coastal
coastal counties along flood, wave hazard,
the open Pacific and associated risks.
coastline.
SF Bay | Open Coast
www.r9coastal.org
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5. CCAMP / OPC Study - Phases
Del Norte
Humboldt
Michael
Phase 1 (2010)
Baker Jr. Mendocino
Ten Counties
Sonoma
Northern and Central
QA/QC Marin
San Francisco California Coast
San Mateo
Santa Cruz
AECOM Monterey
San Luis Obispo
Santa
Barbara
Objective:
Phase 2 (2012) Ventura Determine new
Five Counties Los
Angeles
BFEs and flood
Southern Orange extents
California Coast San Diego
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6. CCAMP / OPC Study - Process
Where we are right now:
Discovery • Scoping Meetings
(Kick-off Meetings,
TAP R E V IE W
Field Recon, Outreach)
Data
Acquisition • Data Acquisition
(LIDAR, Tide Records,
OUTREAC H
Offshore Waves,
Engineering Bathymetry)
Analyses
• Engineering Analyses
Floodplain (Wave Setup, Dune
Mapping Erosion, Wave Runup)
Map
Production
Post-Preliminary
Processing Fall-Winter 2014
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7. CCAMP / OPC Study – Schedule
Initial Kick-Off Meeting March-May 2011
Field Reconnaissance March-May 2011
Engineering Analysis Now through Fall 2012
Floodplain Mapping Summer 2012 – Spring 2013
Preliminary Map Production Winter 2013 – Fall 2013
Post-Preliminary Processing Summer 2013 – Fall 2014
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8. Apply “Final Draft Guidelines
for Coastal Flood hazard
Analysis and Mapping for the
Pacific Coast of the United
States”(dated Jan. 2005)
• Phase 1 – Central &
Northern CA
(10 coastal counties)
• Phase 2 – Southern CA
(5 coastal counties)
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9. Don’t be fooled! Coastal flood analysis dates to early 1980s
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18. • Deepwater Waves:
OceanWeather Inc. (50-year
deepwater wave hindcast 1960-
2010)
• Nearshore Wave
Transformation: Scripps
Institution of Oceanography
MOnitoring and Prediction
(MOP) System
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19. Andrew Cox
Vince Cardone
• Global Reanalysis of Ocean Waves
(GROW) Model
• Nested model grids
• Spectra archive/output points at coast
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21. Study Methods:
Nearshore Wave Transformation
“Changes in wave characteristics
as waves propagate from
deepwater to shallow water”
• Nearshore bathymetry changes
wave height and direction
•Flooding at the shoreline not
completely described by deepwater
waves
• Need mechanism to transform
wave spectra from deepwater to
edge of surf zone
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29. Dynamic Setup = 2.9 ft
Static Setup = 2.8 ft
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30. • 1%-annual-chance (base
flood) and 0.2% total water LiMW
level floodplains A
• Mapping of coastal hazard
zones and BFEs (and
primary frontal dune VE
Zones)
• (Sea level rise and long-
long-
term shoreline change
not included at this time)
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