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Process-based approach on tidal inlet evolution – Part 1
Published in C. Marjolein Dohmen-Janssen, Suzanne J.M.H. Hulscher, River, Coastal and Estuarine Morphodynamics: RCEM 2007, 2019
D.M.P.K. Dissanayake, J.A. Roelvink
Harbours are often designed based on requirements imposed by safe and efficient navigation. In the past decades many (mainly desk and/or laboratory) studies have been carried out aiming at the reduction of harbour siltation rates. From these studies, it follows that reductions in siltation rates up to 50% may be reached. However, only few of such sedimentation reduction measures have been implemented. This study aims at exploring the possibilities to apply simple and effective siltation reduction measures in the harbours along the rivers in the Netherlands. From about 200 harbours along the River Rhine and River Meuse three harbours were selected. This selection was made in close consultation with experts and stakeholders, based on among others the siltation rate, harbour geometry from remote sensing images, flow velocities and representativeness for Dutch river harbours. One of the three harbours was further elaborated in a first design. As distinct from preceding studies the design for this pilot project has been made using field data and expertise of river managers and specialists, but without physical scale model studies and numerical experiments. In addition a simple cost benefit analysis has been carried out.
Introduction
Published in Larry Canter, Environmental Impact of Water Resources Projects, 1985
To provide an illustration of the impacts of coastal projects, Mulvihill et al. (1980) presented information from 555 reference sources on the biological impacts of breakwaters, jetties, groins, bulkheads, revetments, ramps, piers and other support structures, buoys and floating platforms, small craft harbors, bridges, and causeways. The information typically showed that the impact of the structure on the environment is site specific. Fourteen case studies were included, and small boat harbors, bridges, causeways, bulkheads, breakwaters, and jetties were found to have the most potential for causing coastal environment impacts. Revetments, groins, and ramps have moderate impact potential, while buoys and floating platforms, piers, and other support structures have low impact potential. The majority of the information included provides qualitative descriptions of anticipated or realized impacts. Minimal information on the quantitative impacts of specific structures was located as a part of the state-of-the-art review (Mulvihill et al., 1980).
Trace metal leaching from quarry by-product-stabilized marine sediments
Published in Marine Georesources & Geotechnology, 2021
Atul Singh, Margaret Houlihan, Asli Y. Dayioglu, Ahmet H. Aydilek
Dredging operations are necessary to maintain navigation in waterways and access to harbors. Each year, several hundred million tons of materials are dredged from waterways globally (Boutin, 1999, Mattei et al. 2016). These materials, ranging from gravels to clays, can contain a variable amount of organic matter and different types and levels of contaminants (Hamouche and Zentar 2018). Management and storage of dredged materials (DMs) is a worldwide problem, and traditional solutions such as disposing sediments offshore can be constrained by national and international environmental regulations. Alternative solutions, such as land disposal, are costly and require large areas (Grégoire 2004, Rakshith and Singh, 2017). The development of beneficial use strategies for DMs is important in solving these problems.
Metals concentration and bioaccumulation in the marine-coastal trophic web from Buenos Aires province southern coast, Argentina
Published in Chemistry and Ecology, 2019
Florencia Ornela Vilches, M. A. Bobinac, A. C. Labudía, M. N. Paso Viola, J. E. Marcovecchio, H. L. Cappozzo, M. V. Panebianco
The adjacent localities of Necochea-Quequén (N, 38° 37′ S, 58° 50′ W) are located in the southern coast of Buenos Aires (Figure 1), an agricultural and livestock production area of great economic importance for Argentina. These localities are separated from each other by Quequén Grande river, whose mouth houses Puerto Quequén harbour, the second deep-waters seaport in the country. The harbour main activities are related to farming, chemicals production for agricultural uses and biodiesel production. The harbour operation and the growth of the city have facilitated the occurrence of several environmental issues, such as atmospheric pollution due to vapours, dumps, coastal erosion and particulate matter generated by vessels’ loading and unloading operations; and soils and water pollution caused by solid waste disposal, liquid industrial effluents and dredging [20].
The impact of ship size on ports’ nautical costs
Published in Maritime Policy & Management, 2020
When ships visit ports, they make use of nautical facilities and services provided by a Port Authority, services like harbour basins and vessel traffic management. A Port Authority is a ‘State, Municipal, public, or private body, which is largely responsible for the tasks of construction, administration and sometimes the operation of port facilities and, in certain circumstances, for security’ (Worldbank 2007)1. Port Authorities can have the aim to maximize throughput (Talley 2006; Suykens and van de Voorde 1998) instead of maximizing profit, in particular when they are public bodies. In many cases Port authorities will just maximize their profits (Bandara and Nguyen 2016).