Increase Light Below Deck: Flood Adaptation Measure


Seawall: Light Penetrating Sidewalk Installed - Seattle, WA.

©Seattle DOT via Flickr.com



ECOLOGICAL INFRASTRUCTURE
WATER LEVEL RANGE: Supratidal

SHORELINE LOCATION:
Asset Specific



DESIGN LIFE
ADAPTABILITY
IMPACT ON THE WATERFRONT
CONSTRUCTION COST
Decades
Low
Minor Intervention
TBD


COASTAL FLOOD HAZARDS MITIGATED:
Enhancements can provide flood protection when combined with other physical infrastructure
Sea Level Rise
Storm Surge
Groundwater
Waves
Erosion


MEASURES COMPATIBILITY
ECOSYSTEM SERVICES: Measure may affect these shoreline values
Flood
Seismic
Raised Marine Structures, Building Adaptations
N/A
Aquatic Habitat
Terrestrial Habitat
Water Quality
Carbon Storage


DESCRIPTION:
This measure involves adding light penetrating surfaces to pier decks to allow light to pass through, reducing the shadowing effect of opaque piers on the bottom. The reduction in shadowing will allow light to penetrate the water, and depending on the water’s turbidity, the additional light can stimulate growth of aquatic vegetation and habitat creation.


CONSIDERATIONS:
ADVANTAGES:
DISADVANTAGES:
  • The transparent surfaces need to be structurally sound.
  • Installation may proceed with retrofits to existing structures or concurrently with new structures.


  • Can create and enhance tidal and subtidal habitats
  • Potential high maintenance depending on traffic, design, and material.


CONSTRUCTION IMPACTS TO THE PUBLIC:
SEA LEVEL RISE ADAPTATION OPPORTUNITIES:
CASE STUDIES:
  • Depending on the structure to be enhanced, construction impacts may be significant but contained. Can be readily implemented from marine equipment with disruption only to tenant impacted in a facility under construction. For enhancements to public over-water facilities, disruption may impact Promenade or Embarcadero operations.
  • Functional within a wide range of water levels as long as light penetration is not reduced at high water levels
  • None cited


DESIGN OPPORTUNITIES:
Ecological Enhancements
Urban Design
Form
  • Increase in biodiversity and marine habitat
  • Design of features can improve visual access to the water and aquatic habitats.
  • Formal design can be integrated in other improvements to the public realm alongside (re-)construction of structural over-water features.


DESIGN CONSIDERATIONS:

  • The transparent surfaces need to be structurally sound and able to bear weight without cracking.

SITE-SPECIFIC CONSIDERATIONS:

  • Water levels, waves, and currents should be well defined to assess water turbulence, turbidity, and light penetration.
  • Wave and current conditions will need to be understood to determine the growth potential of vegetation and survivability.
  • Water depth, clarity, and turbidity should be conducive of light penetration.

URBAN DESIGN CONSIDERATIONS:

  • Improves the sustainability of the waterfront and engagement with pedestrians.

INSTALLATION AND CONSTRUCTABILITY CONSIDERATIONS:

  • Installation and constructability will depend heavily on existing conditions. The existing pier decks will need to be retrofitted to adapt the transparent panes.

OPERATIONS AND MAINTENANCE CONSIDERATIONS:

  • Once placed, the transparent panes may need to be regularly cleaned and inspected.


Download the Increase Light Below Deck Factsheet.

Learn about other types of measures from our Measures Explorer page.


Seawall: Light Penetrating Sidewalk Installed - Seattle, WA.

©Seattle DOT via Flickr.com



ECOLOGICAL INFRASTRUCTURE
WATER LEVEL RANGE: Supratidal

SHORELINE LOCATION:
Asset Specific



DESIGN LIFE
ADAPTABILITY
IMPACT ON THE WATERFRONT
CONSTRUCTION COST
Decades
Low
Minor Intervention
TBD


COASTAL FLOOD HAZARDS MITIGATED:
Enhancements can provide flood protection when combined with other physical infrastructure
Sea Level Rise
Storm Surge
Groundwater
Waves
Erosion


MEASURES COMPATIBILITY
ECOSYSTEM SERVICES: Measure may affect these shoreline values
Flood
Seismic
Raised Marine Structures, Building Adaptations
N/A
Aquatic Habitat
Terrestrial Habitat
Water Quality
Carbon Storage


DESCRIPTION:
This measure involves adding light penetrating surfaces to pier decks to allow light to pass through, reducing the shadowing effect of opaque piers on the bottom. The reduction in shadowing will allow light to penetrate the water, and depending on the water’s turbidity, the additional light can stimulate growth of aquatic vegetation and habitat creation.


CONSIDERATIONS:
ADVANTAGES:
DISADVANTAGES:
  • The transparent surfaces need to be structurally sound.
  • Installation may proceed with retrofits to existing structures or concurrently with new structures.


  • Can create and enhance tidal and subtidal habitats
  • Potential high maintenance depending on traffic, design, and material.


CONSTRUCTION IMPACTS TO THE PUBLIC:
SEA LEVEL RISE ADAPTATION OPPORTUNITIES:
CASE STUDIES:
  • Depending on the structure to be enhanced, construction impacts may be significant but contained. Can be readily implemented from marine equipment with disruption only to tenant impacted in a facility under construction. For enhancements to public over-water facilities, disruption may impact Promenade or Embarcadero operations.
  • Functional within a wide range of water levels as long as light penetration is not reduced at high water levels
  • None cited


DESIGN OPPORTUNITIES:
Ecological Enhancements
Urban Design
Form
  • Increase in biodiversity and marine habitat
  • Design of features can improve visual access to the water and aquatic habitats.
  • Formal design can be integrated in other improvements to the public realm alongside (re-)construction of structural over-water features.


DESIGN CONSIDERATIONS:

  • The transparent surfaces need to be structurally sound and able to bear weight without cracking.

SITE-SPECIFIC CONSIDERATIONS:

  • Water levels, waves, and currents should be well defined to assess water turbulence, turbidity, and light penetration.
  • Wave and current conditions will need to be understood to determine the growth potential of vegetation and survivability.
  • Water depth, clarity, and turbidity should be conducive of light penetration.

URBAN DESIGN CONSIDERATIONS:

  • Improves the sustainability of the waterfront and engagement with pedestrians.

INSTALLATION AND CONSTRUCTABILITY CONSIDERATIONS:

  • Installation and constructability will depend heavily on existing conditions. The existing pier decks will need to be retrofitted to adapt the transparent panes.

OPERATIONS AND MAINTENANCE CONSIDERATIONS:

  • Once placed, the transparent panes may need to be regularly cleaned and inspected.


Download the Increase Light Below Deck Factsheet.

Learn about other types of measures from our Measures Explorer page.