Nearshore Waves and Erosion Model

Quantifying the Coastal Protection Benefits Provided by Natural Habitats

Inputs

Coastal Vulnerability Model

Nearshore Waves and Erosion Model

• Know the Environment• Evaluate Scenarios

Coastal Protection Model

Inputs

ozcoast.org

SiteCharacteristics

Storm Characteristics

Management Action

Biotic Features

Coral Cay Conservation

Social Data

Outputs

Inputs

ozcoast.org

SiteCharacteristics

Storm Characteristics

Management Action

Coral Cay Conservation

Social Data

Relative ExposureUSGS

Avoided Eroded & Inundated Area

Short & Long Term Effects of Seawalls

Avoided Property Damage

Avoided Number of People Affected

Outputsa

bBiotic

Features

Nearshore Wave and Erosion Model

oyster reef

Nearshore Wave and Erosion Model

seagrass beds

marshesmangroves coral reefs

sand dunes

Bathymetry/Topography Storm InfoWaves

Wave Model

Bathymetry/Topography Storm InfoWaves

Wave Model

Wave height

Bathymetry/Topography Storm InfoWaves

Wave Model

Wave height

Total Water Level

Bathymetry/Topography Storm InfoWaves

Wave Model

X-Shore Erosion

Wave height

Inundation

Total Water Level

Bathymetry/Topography Storm InfoWaves

Wave Model

X-Shore Erosion

Wave height

Inundation

Total Water Level

Bathymetry/Topography Storm InfoWaves

Wave Model

X-Shore Erosion

Wave height

Inundation

Total Water Level

Bathymetry/Topography Storm InfoWaves

Storm Surge

Storm Model

Wave Model

X-Shore Erosion

Wave height Storm Surge

Inundation

Total Water Level

Storm Model

Bathymetry/Topography Storm InfoWaves

Profile Generator

conceptart.org

Profile Generator

Profile Generator

Profile Generator

Profile Generator

Nearshore Waves and Erosion

S.Maciejewski

Nearshore Waves and Erosion

Nearshore Waves and Erosion

15 hrs Storm

Hmax=3m

T=8s

BotVegbg

x

ECg DDD

8

1

Mendez&Losada, 2004

Run Wave Model

Dean&Bender, 2006

Example Outputs: Seagrass Beds

Wetlands Attenuate Waves

Wetlands Attenuate Waves

interiorclip.com

Wetlands Can Replace Structures

Surge Height Seawall Levee

No VegetationLevee

Vegetation1 m 3.5 m 0.5 m 0 m2 m 4.5 m 2.5 m 1.2 m

interiorclip.com

Wetlands Can Replace Structures

bayareaobserver.com

Protect Marshes

Design WaveH=1m; T=5s

Kt Ht0.70 0.330.70 0.330.71 0.33

Base Width-1Input ParametersBase Width+1

Kt Ht0.65 0.310.70 0.330.78 0.37

Crest Width-1Input ParametersCrest Width+1

Kt Ht0.07 0.030.70 0.330.84 0.40ReefHeight+1

ReefHeight-1Input Parameters

Example Outputs: Oyster Reefs

Oysters to the Rescue

Oysters to the Rescue