SEA LEVEL RISE IN NORTH CAROLINA IMPLICATIONS FOR COASTAL POLICY - - PowerPoint PPT Presentation

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SEA LEVEL RISE IN NORTH CAROLINA IMPLICATIONS FOR COASTAL POLICY - - PowerPoint PPT Presentation

Oct 07, 2022 393 likes •592 views

SEA LEVEL RISE IN NORTH CAROLINA IMPLICATIONS FOR COASTAL POLICY Relative Sea Level Rise Average Yearly Sea Level, Key West Florida, 1950-2006 1.2 1 0.8 Sea Level (ft) 0.6 0.4 0.2 0 Year 1952 1956 1959 1962 1965 1968 1971 1974

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SLIDE 1

SEA LEVEL RISE IN NORTH CAROLINA

IMPLICATIONS FOR COASTAL POLICY

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SLIDE 2

Relative Sea Level Rise

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SLIDE 3

Average Yearly Sea Level, Key West Florida, 1950-2006

0.2 0.4 0.6 0.8 1 1.2 Year 1952 1956 1959 1962 1965 1968 1971 1974 1977 1980 1983 1986 1989 1992 1995 1998 2001 2004

Year Sea Level (ft)

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SLIDE 4

Relative Sea Level Rise

Ocean Rise Erosion

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SLIDE 5

Policies and Rules

  • Oceanfront Construction

– Building codes

  • Setbacks & Shoreline Retreat

– 30 year life span

  • Beach Nourishment

– High costs & collateral environmental impacts

  • Beach Hardening and Sandbag Walls

– Prohibited and limits on sandbag size & lifespan

  • Storm Damage Attenuation

– Berms, local zoning, and federal insurance policy

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SLIDE 6

Storm Surge and Sea Level Rise, Key West Florida 1950-2006

2 4 6 8 10 12 14 1950 1955 1959 1963 1967 1971 1975 1979 1983 1987 1991 1995 1999 2003

Year Elevation (ft)

Yearly Average Storm Surge House Elevation

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SLIDE 7

Relative Sea Level Rise

Ocean Rise Erosion Deep Crustal Movements

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SLIDE 8

Relative Sea Level Rise

Ocean Rise Erosion Deep Crustal Movements Shallow Sediments

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SLIDE 9

Relative Sea Level Rise

Ocean Rise Erosion Deep Crustal Movements Shallow Sediments Remineralization Sedimentation

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SLIDE 10

SO4

2- Reduction

CH4 Production O2 Consumption Sediment depth

Changes Due to Salinity Increase

Year-round Methanogenic Part-time SO4

2- Reducing

SO4

2- Reducing CH4 Inhibiting

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SLIDE 11

Cape Fear River

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SLIDE 12

INNER COAST POLICY ISSUES

  • Shoreline Erosion

– Bulkheads and Wetland Issues

  • Non-coastal & 404 Wetlands
  • Infrastructure

– Roads, sewers, etc

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SLIDE 13

LAND USE PLANS

  • Mandated under CAMA
  • Few integrate Sea Level Rise other than

preparation for hurricanes

  • Subject to change
  • Do not have to be followed except in AECs

where CAMA permits are required

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SLIDE 14

PUBLIC AWARNESS

  • Education
  • Hazard Notification
  • Disasters
  • Insurance
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SLIDE 15

OTHER ISSUES

  • Dams trap sediments preventing sand

from reaching beaches and accelerating Relative Sea Level Rise.

  • Higher water tables limit effectiveness of

septic systems and lead to water quality issues and potential human health problems

  • Insurance Dilemma
  • Cumulative Impacts
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SLIDE 16

HURRICANE RESPONSE

  • Human safety and health primary concern
  • Reconstruction driven by emotion, not by

planed shoreline retreat or response to sea level rise

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SLIDE 17
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SLIDE 18

QUESTIONS?

  • Contact Information
  • Courtney Hackney
  • Dept. Biology and Marine Biology
  • UNC-Wilmington
  • 910-962-3759
  • Hackney@UNCW.edu