Breaching vulnerability of coastal barriers under effects of tropical cyclones: A model study on the Hue lagoon - Vietnam

Under effects of tropical cyclones, the coast is subjected to attack both by surge and wave from the sea and by flooding from the bay. These forces pose a serious breaching threat to natural sea-defence works such as barrier spits, barrier islands, lagoon barriers, etc. on the coast. Unintended breaching can be catastrophic, causing losses of...

Application of Duflow for studying hydrodynamics and stability of tidal inlets in the Tam Giang - Cau Hai Lagoon

This paper presents an application of an one-dimensional unsteady numerical model DUFLOW for hydrodynamic simulation of a complex lagoon-inlet system in Vietnam. The difficulties due to the lack of data for model boundary conditions is overcome by using sensitivity analysis approach for the uncertainties of boundary conditions. Model results are...

Stability analysis for tidal inlets of Thuan An and Tu Hien using Escoffier diagram

Stability analysis of tidal inlets is very important in providing knowledge on the behaviour of tidal inlet and lagoon systems. The analysis results can help to plan and manage the system effectively as well as to provide information for stability design of the inlets. This paper presents a method of building and applying the Escoffier diagram...

Analytic solutions for flow in tidal inlets with tributary inflow

Hydraulic characteristics of flow in a tidal inlet act an important role in morphological changes of the inlet. In normal conditions, inlet currents flush sediment out of the inlet to maintain its opening against longshore sediment transports that tend to close the inlet. The currents in the inlet are contributed by the tides and also from...

Hydrodynamic modelling of tidal inlets in Hue, Vietnam

Application of an one-dimensional numerical model for hydrodynamic simulation of a complex lagooninlet system in Vietnam is presented. Model results help to get a better understanding on the behaviour of the system. Based on the numerical model results and analytic solutions, stability of tidal inlets is evaluated.

Morphology an morphodynamics of the Wadden Sea

Geological and morphological description of the Wadden Sea, description of the present situation.

Behaviour oriented model for the evaluation of long-term lagoon-coastal dynamic interaction along the Po River Delta

The dynamics of microtidal lagoons and adjacent coasts

We have formulated an aggregated-scale behaviour-model for the interaction between a tidal basin and its adjacent coastal environment, without adopting a priory assumptions about their independent dynamic equilibrium behaviour. Necessarily so, the model combines observations and findings resuhing from analogical model applications. The model...

RESIDENCE TIMES OF WATERS BEHIND BARRIER ISLANDS

This study pertains to lagoons connected to the ocean by narrow, constricted inlets. The purpose of the study is to evaluate the convective or non-dispersive transport in these lagoon systems. Equations describing the flow in the lagoon and in the inlets are derived. Because the convective transport results from the higher order (non-linear)...

Keta Lagoon – Closure of tidal inlet (called Kedzi Canal)

In November 1963 as well as in August 1968 a cut was made by P, W.D, in the seawall separating the Keta Lagoon from the Gulf of Guinee. The intention was in both cases to lower the extremely high water-level of the Keta Lagoon by discharging water into the sea. " This turned out to be successful. Within 5 days the Lagoon level dropped from + 4.6...