Felicia Weir

1
Beach and Berm Morphodynamics Fronting Coastal
Lagoon Entrances

• Felicia Weir
• Supervisor M.G. Hughes

2
Outline

• A Methodology for Predicting Berm Crest Elevation
  Fronting Coastal Lagoons
• Beach face morphodynamics fronting a coastal
  lagoon
• Berm Development and Lagoon Closure on a Gently
  Sloping Beach
• Timetable for Completion

3
Predicting Berm Crest Elevation Fronting Coastal
Lagoons

• A wave-built berm is an accretionary sedimentary
  feature located at the top of the beachface

4
Results FRF

• Berm height and runup height are positively
  correlated with a correlation coefficient of
• R 0.485
• The regression model indicates a maximum berm
  height of 2.82 m 0.87

5
Results Central Coast

• Again, berm height and runup height are
  positively correlated with a correlation
  coefficient of R 0.452
• The regression model indicates that the maximum
  berm height is 3.27 m 0.94

6
Beach face morphodynamics fronting a coastal
lagoon
7
Morphology
Profile Response 2b
8
Hydrodynamics
9
Berm Development and Lagoon Closure on a Gently
Sloping Beach
10
Lagoon Channel Profile
11
Waves in the Channel
12
Timeline For Completion
13
The End