AIS data analysis for the impacts of wind and current on ship behavior in straight waterways

Due to the increasing ship traffic flow in ports, maritime traffic safety has attracted much atten-tion. In addition to traffic flow, the ship safety in restricted waters is influenced by external navigational fac-tors (visibility, wind and current), encounter situations and human factors on board. In this paper, we investi-gate the effect of...

AIS data analysis for vessel behavior during strong currents and during encounters in the Botlek area in the Port of Rotterdam

Maritime traffic safety and capacity raise enormous attention nowadays, especially in ports and inland waterways with high traffic density and restricted waterway geometry. However, a limited number of factors is considered in existing maritime models. Especially influences of external factors (wind, visibility and current), vessel encounters...

AIS-data analysis for vessel behavior during strong currents and during encounters in the Botlek Area in the Port of Rotterdam

Maritime traffic safety and capacity raise enormous attention nowadays, especially in ports and inland waterways with high traffic density and restricted waterway geometry. However, a limited number of factors is considered in existing maritime models. Especially influences of external factors (wind, visibility and current), vessel encounters...

Estimation of slack tide using GPS measurements on a buoy: A case study on buoy 18 in the Schelde Estuary

In this paper I present a novel method to determine the time of occurrence of tidal slack with a GPS receiver mounted on an anchored buoy commonly used to delineate shipping lanes in estuaries and tidal channels. Slack tide occurs when the tide changes direction from ebb to flood flow, or from flood to ebb. The determination of this point in...

Study of fatigue design on marine current turbine support structure, Bali-Indonesia

Clean Green energy is being desired all over the globe. It gives cleaner world and healthier environment to live. Most of the green energy resources such as tidal and wave are freely available in large amount and also sustainable. On the other hand, the energy demand is increasing along with population growth. Therefore, researchers are...

Nonlinear Evolution of Shear Instabilities of the Longshore Current

Surface gravity waves breaking in the nearshore region force a longshore surf zone current. This current can be unstable to longshore periodic perturbations. The continuity and momentum conservation equations averaged over the short wave time scales and over depth present a suitable basis for the modeling of these motions. The governing...

Liquefaction and erosion of mud due to waves and current: Experiments on Westwald Clay

A research project was carried out at the Delft University of Technology in order to study the interaction between waves as weil as a current and a muddy bed. For this purpose several experiments were made on two artificial clays, namely China Clay and Westwald Clay. The results of the experiments on China Clay were reported by De Wit (1994). In...

Liquefaction and erosion of mud due to waves and current: Experiments on China Clay

A research project was started at the Delft University of Technology in order to study the interaction between waves as well as a current and a muddy bed. For this purpose several experiments were made on artificial clays. In the present report only flume experiments on China Clay are discussed. In the experiments made special attention was paid...

Tide and Currents

This papers discusses the following topics related to tides and currents: - Tide Generation: the tide generating forces, the development of tidal potential, the equilibrium tide, the development by Doodson, shallow water tides, types of tides - Harmonic and Non-Harmonic Analysis: non-harmonic terms, principles of harmonic analysis, least square...

Mechanics of Sediment Transport by the Combination of Waves and Current

The motivation to develop a transport formulation for the combination of waves and current has been the necessity to model longshore transport passing tidal in- and outlets. The generally applied C.E.R.C. formula for the longshore transport is not applicable here because that formula relates the longshore transport to the longshore current...

Sediment concentrations and sediment transport in case of irregular non-breaking waves with a current

The present report contains a description of an experimental program, as a follow up of experiments by v.d. Kaaij and Nieuwjaar in 1986, and Nap and Van Kampen in 1987. As in the second study, in the present study a particle sand diameter of D50 = 100 mu was used, so that the experiments of Nap and Van Kampen will be referred as "the earlier 100...

Sediment transport in case of irregular non-breaking waves with a current

Investigation to sediment transport rate in case of waves and currents, tests executed in the wave-current flume of the laboratory of Fluid mechanics of TU Delft. Sediment transport was measured using sand of 100 micron; comparison to similar tests with 200 micron sand.