Wyniki wyszukiwania - BazTech

1

Rozwój śródlądowych dróg wodnych w Europie - realizacje i plany

Banasiak Robert

Gospodarka Wodna

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2023

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Nr 7

8--13

PL

W artykule przedstawiono wybrane działania zmierzające do poprawy wykorzystania potencjału transportowego europejskich szlaków wodnych. Przedstawiono realizacje i plany we Francji, Belgii, Niemczech, Czechach i w Polsce z próbą wskazania najistotniejszych kwestii lub wyzwań technicznych i środowiskowych. Z dokonanego przeglądu wynika, że rozwój drogi wodnej może być atrakcyjną przyszłością dla danego regionu i jest łatwiejszy do przeprowadzenia na istniejących szlakach i kanałach lateralnych niż w przypadku rzek swobodnie płynących, gdyż rodzi to obawy o ich przyrodniczą degradację i sprzeciwy organizacji środowiskowych. Dotyczy to rzek Łaby i Odry.

EN

The article presents selected activities aimed at an improved use of the European waterways transport potential. The author describes the implemented projects and plans in France, Belgium, Germany, Czech Republic and Poland in an attempt at indicating the most important issues or technical and environmental challenges. The review indicates that the development of a waterway may be an attractive future prospect for a given region and is easier to implement on the existing routes and lateral channels than on the freely flowing rivers, as it raises concerns as to their degradation and protests of environmental organisations. It regards the Elbe and Oder rivers.

2

Modeling the hydrodynamic interactions between the river morphology and navigation channel operations

Neveen Badawy Abdel-Mageed, El-Hazek Alaa N., Elsersawy Hossam Mohamed, Mohammed Ebtesam Rezk

Journal of Water and Land Development

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2021

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no. 51

1--10

EN

The Nile River is the main route for inland navigation in Egypt. The vessels navigating through inland waterways generate complex physical forces that need to be studied extensively. Quantifying the effects of vessels sailing along a waterway is a complex problem because the river flow is unsteady and the river bathymetry is irregular. This paper aims to investigate the hydrodynamic effects resulting from the movement of vessels such as return currents around the vessel, the draw down of the water surface, under keel clearance, and the shear stress induced by vessels operating in the Nile River. Modeling such effects has been performed by applied the two-dimensional ADH (adaptive hydraulics) model to a river reach for different navigation channel operation scenarios. The obtained results show that the draw down heights, the water fluctuation, and the shear stress magnitude are larger when the river cross sectionals are narrow and the shallow water depths. These river sections are considered more disposed to bed erosion and it is morphologically unsafe. The section having the narrowest width and the lowest depth was associated with the largest drawdown percentages of 98.3% and 87.3% in one-way and two-way scenarios. While the section having the widest width and the largest depth was associated with the least drawdown percentages of 48.5% and 51.9% in one-way and two-way scenarios. The section having the narrowest width and the lowest depth was associated with the largest fluctuations of 22.0 cm and 41.9 cm in one-way and two-way scenarios. While the section having the widest width and the largest depth was associated with the least fluctuations of 0.6 cm and 1.8 cm in one-way and two-way scenarios. The section having the narrowest width and the lowest depth was the worst section for under keel clearance of 5.0 cm and 33.3 cm in one-way and two-way scenarios. While the section having the widest width and the largest depth was the best section, where its clearance values were 183.2 cm and 155.0 cm in one-way and two-way scenarios. It is concluded that a numerical model is a valuable tool for predicting and quantifying the hydrodynamic effects of vessels moving through a two-dimensional flow field and can be used to evaluate different scenarios that are difficult to measure in the field or a physical model. Also, it provides visualization products that help us understand the complicated forces produced by vessels moving in a navigation channel.

3

Experimental Study of Forces Exerted on Ships Due to the Vertical Walls of Navigation Channels

Fathi-Kazerooni M., Seif M. S.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2015

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Vol. 9, no. 2

199--203

EN

Ship maneuvering in restricted waters of harbor basins and navigation channels had been the main concern in recent years due to sudden increase of ship’s size. When the ship enters a navigation channel the lateral boundary of the channel exerts a transverse force and turning moment on the ship hull. These forces are so important in the analysis of safety of ship navigation in the channels. Ship model test in the towing tank is a reliable method to evaluate these forces. Therefore systematic model tests are held for modeling of the forces exerted on the tanker ship and dhow model traveling alongside a vertical wall. A database of the interaction forces is developed and the specific hydrodynamic effects related to the phenomena are discussed. The results can be used for simulation of ship maneuvering and assessment of safety limits for navigation of ships alongside the quay walls and breakwaters.

4

Channel Utilization in South Louisiana Using AIS Data, 2011-2012

Kaiser M.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2014

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Vol. 8 no. 4

515--522

EN

South Louisiana is undergoing rapid land loss and the construction and utilization of navigation channels by the offshore oil and gas industry, the commercial fishing industry, the oil refining industry, and freight shippers is one cause. A network of natural and man-made navigation channels support commerce and industry throughout the region, but no quantitative information is available on the users of the channels and their contribution to land loss. The purpose of this note is to characterize utilization across eight channels in South Louisiana using data from the Automatic Identification System. Approximately 125,000 vessels used the channels over a two year period between 2011-2012. The Mississippi River was the most heavily utilized channel with an average of 345 vessels per week across the report zone, followed by Bayou Lafourche and Sabine Pass with about 195 vessels per week. The oil refining industry was the primary user of the Calcasieu and Sabine Pass channels while the freight industry was the primary user of the Mississippi River. The offshore oil and gas industry were the primary users of Bayou Lafourche, the Houma Navigation Canal, the Atchafalaya River and Freshwater Bayou.

5

New Black Sea Terminal of Port Kulevi and it Navigating Features

Gegenava A., Varshanidze N., Khaidarov G.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2010

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Vol. 4, no. 4

391--396

EN

In May, 2007 in Georgia the new Black Sea Terminal (including the complex of a railway junction, capacities for storage of oil) was opened in the port Kulevi. Necessity of creation of the named terminal in Georgia was caused by following factors: 1. The necessity of search and the creation new alternative ways of safe transportation of oil to Europe; 2. A favourable geographical position of Georgia - Asia, the Near East and Europe crossroads; 3. Presence of already existed means of communication between Georgia and oil-producing regions - Kazakhstan, Turkmenistan and Azerbaijan. Choosing the port and terminal place it was necessary to be guided first of all by maintenance of safety navi-gation and minimum expenses from the point of view of an economic profit. That is why the special attention was paid to search of a natural reservoir with an exit in the sea. This article deals with the questions of construction of the oil terminal, maintenance of port Kulevi with means of the navigating aids and features of entering and leaving vessels.

6

Kanał żeglugowy w polskiej części Mierzei Wiślanej

Dembicki E., Jednorał T., Sedler B., Jaśkowski J., Zadroga B.

Inżynieria Morska i Geotechnika

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2006

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nr 5

275-286

PL

Główne funkcje kanału żeglugowego. Stan aktualny oraz możliwości polskich portów Zalewu Wiślanego. Wymiary planowanego kanału żeglugowego. Zrównoważony rozwój - idea i zasady funkcjonowania zrównoważonego rozwoju. Prognoza wpływu przebiegu zjawisk hydrodynamicznych po odmorskiej stronie Mierzei Wiślanej na zasypywanie kanału oraz rozmywanie Mierzei Wiślanej. Określenie ewentualnego stopnia pogorszenia warunków ekologicznych wód Zalewu Wiślanego na skutek wzrostu zasolenia wód Zalewu. Wpływ kanału żeglugowego na ochronę przeciwpowodziową terenów przyzalewowych. Wstępna propozycja wykorzystania urobku z budowy kanału żeglugowego przez Mierzeję Wiślaną. Wnioski.

EN

Main Functions of navigational channel. Present state and opportunities for Polish ports located along the Vistula Sandbar. Dimensions of new navigational channel. Sustainable development - idea and principles. Prognosis of the influence of hydrodynamic phenomena occurring at Vistula Sandbar seaside on the channel silting-up and erosion of Vistula Sandbar. Determination of potential worsening of ecological conditions of Vistula Lagoon waters due to seawater intrusion. Impact of navigational channel on flood protection of floodland. Primary proposal to use the excavating material from dredging process during the construction of navigation channel. Conclusion.