Marine Sediments: Processes, Transport and Environmental Aspects

Risio, Marcello Di; Hayes, Donald F.; Pasquali, Davide

doi:10.3390/jmse8040243

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Therefore, dredging works are nowadays an area of interest of port authorities as a necessary investment for further development [1,2]. Port dredging is a long-term and burdensome process throughout the regular operation of navigation and the normal functioning of port terminals [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

The Model of Support for the Decision-Making Process, While Organizing Dredging Works in the Ports

Kaizer

Neumann

2021

Energies

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The aim of the research was to create a decision-making model, which would be able to support planning, organizing and conducting the dredging works in the port area. The proposed solution is a multiple element system which enables to verify, in a comprehensive way, the majority of the aspects determining the quality and the time of dredging enterprise realization. The paper presents an original approach to the decision-making process during the organization of dredging works, using the computer program. In order to achieve the main goal of the study, the conditions of dredging works were considered. Furthermore, the factors that have an influence on the schedule of the project were evaluated and algorithms, as well as process organization schemes, were developed. If it is not enough, the decision models corresponding to the discussed issue were analysed and the computer program was created. And last but not the least, the proposed project and equipment were verified using a simulation model. While creating this model, the method of multiple criteria AHP (Analytic Hierarchy Process) decision support was used. Moreover, the mass service model with the priority queue regulations, the expert study, and statistical analysis of the traffic flow, were provided. The model was developed in reliance to multiple criteria studies, based on the opinions of multinational experts. These enabled to adjust each element of the system in accordance with various locations. As a result of the research, the following thesis has been proven, that detailed analysis of the conditions of dredging works and taking into account the received conclusions enables to reduce the costs and shorten the time of dredging projects realizations.

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Section: Introductionmentioning

confidence: 99%

The Model of Support for the Decision-Making Process, While Organizing Dredging Works in the Ports

Kaizer

Neumann

2021

Energies

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The addition of biochar as a sustainable strategy for the remediation of PAH–contaminated sediments

et al. 2021

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Study on the Vertical Distribution Characteristics of Suspended Sediment Driven by Waves and Currents

Wu,

Lian,

Liu

et al. 2024

JMSE

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Port coasts are affected by waves and tidal currents, and sediment continues to silt up, leading to a reduction in the depth of water in the channel, blocking the channel and seriously affecting the safe operation of ports. The main cause of sediment deposition in ports is suspended sediment transport, and the characteristics of the vertical distribution of suspended sediment concentrations are the embodiment of the suspended sediment transport law. This paper is divided into three parts to study the vertical distribution characteristics of suspended sediment concentrations. Firstly, the shortcomings of the traditional diffusion model were analysed by using the finite mixing theory (FMT); secondly, the sediment mixing length coefficient κs model was introduced and combined with the sediment group settling velocity model to establish the vertical distribution model of suspended sediment concentrations under wave–current; finally, the effects of various factors on the vertical distribution of the suspended sediment concentration were investigated. The results show that the model in this paper has the characteristics of “low variance and low bias”, which solves the problem that κs is difficult to determine. When the model κs < κs′ (κs′ = 0.4), the concentration of suspended sediment predicted by κs′ is overestimated, and vice versa. As the sediment concentration increases, the interaction between particles increases and the vertical distribution of the suspended sediment concentration shows the pattern of “small top and large bottom”. The larger the particle size, the greater the sedimentation rate of the suspended sediment, and a large amount of sediment will be suspended near the bottom without mixing. The higher the wave height, the stronger the boundary layer turbulence and the movement of the water particles’ trajectory, and the smaller the difference in sediment concentration between the bottom and the sea surface.

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Marine Sediments: Processes, Transport and Environmental Aspects

Abstract: In recent years, increasing attention has been paid to water quality and environmental aspects related to sediment transport driven by both ambient forcing and human activities [...]

Cited by 3 publications

References 11 publications

The Model of Support for the Decision-Making Process, While Organizing Dredging Works in the Ports

The Model of Support for the Decision-Making Process, While Organizing Dredging Works in the Ports

The addition of biochar as a sustainable strategy for the remediation of PAH–contaminated sediments

Study on the Vertical Distribution Characteristics of Suspended Sediment Driven by Waves and Currents

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