Tidal Inlet Morphology

Oral

1212 - A Semi-Analytic Model Of Tidal Inlets And Their Evolution

Presenting Author(s)

• AN

  Almir Nunes, MS

  PhD Student
  Lund University

Additional Author #1(s)

• ML

  Magnus Larson

  Professor
  Lund University

Additional Author #2(s)

• HT

  Hitoshi Tanaka

  Professor
  Tohoku University

Additional Author #3(s)

• HH

  Hans Hanson

In this paper, a simple semi-analytic model of the flow induced by tides through an inlet connecting the sea to a lagoon or bay is developed. The model is employed to derive explicit expressions for key parameters associated with inlet flows such as bay water level amplitude, tidal prism, maximum inlet velocity, and mixing (retention) time. Also, the inlet flow model is combined with a sediment transport model to determine the conditions for equilibrium as well as the evolution of the inlet cross-sectional area towards equilibrium or closure.