Wyniki wyszukiwania - BazTech

1

Rescue device concept for the ARGO profiling float

Olejnik Adam, Walczowski Waldemar, Dawidziuk Marek, Jakus Bartłomiej, Wieczorek Piotr

Polish Hyperbaric Research

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2022

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nr 3(80)

23--38

EN

The material presents the development work carried out by the ARGO-Poland scientific consortium related to the design of rescue systems for ARGO profiling floats used for in situ exploration of the world oceans. The article describes the principle of operation of the Argo float and the theoretical basis of the rescue system and six alternative design solutions for such a system.

2

Fluid Mud and Nautical Bottom – Concept and Application in Itajaí Port Complex (Brazil)

Pion L.M., Alfredini P.

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

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2019

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Vol. 13, no. 2

445--452

EN

Considering the demand for mooring larger ships at Brazilian port terminals, both private and public, in a scenario of growing exports, engineering interventions that can provide improvements in the vessel’s maximum allowed dimensions can represent significant profits. Hence, this work presents an approach of Nautical Bottom, defined as the minimum depth in which ships can navigate without significant adverse effects in ship control and maneuverability without physical damage, with the goal of raising the maximum ship draft allowed in nautical spaces with fluid mud beds. Due to its rheological properties, fluid mud, in general, allows for vessels navigate with low or negative under keel clearance, respecting the established Nautical Bottom concepts. In addition, fluid mud layer thickness at port areas can possibly vary according to hydrodynamics and sedimentologic variations. This article presents an analysis of fluid mud thickness variations within the Itajaí Port Complex (Santa Catarina, Brazil) turning basin, where fluid mud layers are up to 2.5 meters thick, by means of analyses of bathymetric surveys and numerical modeling. The Itajaí Port Complex is located at the Itajaí-açu river estuary, which presents high variability of river discharge and suspended sediments. From bathymetric surveys, it is possible to observe fluid mud thickness from 0.5 to 2.5 meters. Numerical simulation results indicate suspended sediment load as a main environmental aspect for fluid mud thickness variations in the study area.

3

Estimation of Sea Level Rise in Santos Port (Brazil)

Alfredini P., Arasaki E.

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

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2019

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Vol. 13, no. 2

453--458

EN

Santos Port is located in São Paulo State Coast (Brazil), in an estuarine area inside Santos Bay named Baixada Santista. The currents behavior is forced by tides. The resulting tidal level variability (high tide, mean sea level and low tide) recorded from Santos Dock Company tide gauge (1940 to 2014), the longest series of continuous record of tides in Brazil, shows a consistent increasing trend. The estimation about the magnitude of mean sea level rise (MSLR) in recommendations, guidelines or requirements issued by different countries and agencies from 1990 provide examples of different approaches used around the world in comparison with the local trends obtained for Santos Port. It is concluded that MSLR will have a considerable impact upon the port, with approximately 1.0 m rise estimated from 1990 to 2100. Baixada Santista is a lowland situated a few meters upper from the sea level and some areas are possible to be submerged in the end of this century. Other two locations in São Paulo State Coast, Cananeia and Ubatuba, respectively to the SE and NW of Santos, were also compared with the port tidal data to evaluate the consistency of the trends.

4

Development in Earth sciences at the turn of 19 th century (the Arctic Area)

Gurgul H.

Zeszyty Naukowe. Acta Physica / Uniwersytet Szczeciński

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2001

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Nr 12

5-16

PL

Praca zawiera przegląd publikacji dotyczących nauk o Ziemi od XIX wieku. Omówiony został rozwój oceanografii w XIX wieku, oparty na obserwacjach zjawisk fizycznych, chemicznych i dynamicznych. Twórcami oceanologii na przełomie XIX i XX wieku byli: Sandstrom, Helland-Hansen, Margules, Ekman, Defant i inni. Przedstawiono w zarysie ogólne kierunki rozwoju oceanologii i wkład poszczególnych naukowców w jej rozwój oraz miejsce w geofizyce. Następnie zarysowano zapoczątkowanie współpracy międzynarodowej.