Wyniki wyszukiwania - Biblioteka Nauki

1

Use of random walk in two-dimensional lattice graphs to describe influence of wind and sea currents on oil slick movement

100%

Guze S. , Mazurek J. , Smolarek L.

Journal of KONES

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2016

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tom Vol. 23, No. 2

147--153

EN

The concept of oil slick movement being influenced by wind and sea currents is elementary for the decision model of the distribution of large oil spill emergency control means at sea. The analysis of water area conditions such as wind and sea currents is elementary for the concept of oil slick movement. The article presents the model of oil slick movement under the influence of wind and sea currents. In building the model, random walk in two-dimensional lattice graphs has been used. The movement of oil slick is analysed in two ways. In the paper, the movement of the oil slick is analysed in two ways without wind and focus on surface sea currents and with wind and currents. Case one assumes no wind and focuses on surface sea currents only using random walk in a two-dimensional square grid graph. Case two assumes that wind is in place, so oil slick is moving due to surface sea currents and wind currents. The description of movement in case two is based on a two-dimensional lattice graph, which is a combination of a triangular grid graph and a hexagonal grid graph. The article also describes the basic assumptions of oil slick model: the definition of water area, oil slick and algorithm for rescue action to contain the oil spill. Oil slick movement concept is elementary for the decision model of oil spill control at sea. The model allows estimating the distance of oil slick from coastal areas.

2

Estimation of surrounding the spillage time

100%

Mazurek J. , Smolarek L.

Journal of Polish Safety and Reliability Association

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2012

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tom Vol. 3, No. 2

245--250

EN

This article presents the model of oil spill on the grid graph. We consider the three types of grid which parameters are corresponding to condition on the sea. The firefighter problem gives the algorithm to bound the oil spill. We compare the action starting time in model described by sum of N variables with the uniform probability distribution and the action starting time in real situation described by sum of two triangular random variables. For every type of grid we determine the Time Average of Going Around of the Spill.

3

Stochastyczny model dryfu rozlewu olejowego

100%

Mazurek J. , Smolarek L.

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tom nr 92

98--106

PL

Artykuł prezentuje stochastyczny model dryfu rozlewu olejowego na morzu. Model rozlewu olejowego to model kontroli rozlewu na morzu; zawiera on algorytm przeprowadzenia akcji ratowniczej, polegającej na otoczeniu rozlewu oraz analizę czasu trwania akcji ratowniczej. W celu uwzględnienia parametrów prądów morskich i wiatrów na ruch plamy rozlewu powstała koncepcja przemieszczania się plamy rozlewu olejowego.

EN

In the article the stochastic model of the oil spill drift is presented. The oil spill model is a model of oil spill control on the sea; it includes an algorithm of rescue action performance consisting in surrounding the spill, and an analysis of the rescue action time. In order to take into account the influence of sea currents and winds parameters on the spill slick movement, a concept of the model of oil spill slick movement has been developed.

4

The Method of Optimal Allocation of Oil Spill Response in the Region of Baltic Sea

100%

Gucma L. , Juszkiewicz W. , Łazuga K.

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

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2012

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tom Vol. 6, no. 4

489--493

EN

This paper describes the results of a study that aimed at developing an effective anchor watch supporting system to prevent dragging anchor accidents of small domestic merchant ships. The authors performed an experimental study using a training ship in order to investigate the characteristics of the hull movement of a ship lying at single anchor, the cable tension caused by the above movement and etc. Based on the results of the study, the authors propose a standard procedure for safe anchor watch and a new anchor watch supporting system using a PC, a DGPS and an anemometer.

5

Modelling oil spill layer thickness and hydro-meteorological conditions impacts on its domain movement at sea area

88%

Dąbrowska E.

Safety and Reliability of Systems and Processes

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2022

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tom Summer Safety and Reliability Seminar 2022

51--64

EN

The general model of oil spill domain movement forecasting dependent on the thickness of oil spill layer based on a probabilistic approach considering the influence of the hydro-meteorological conditions at sea area is proposed. A semi-Markov model of the process of changing hydro-meteorological conditions is constructed. A two-dimensional stochastic process is used to describe the oil spill domain central point position movement. Parametric equation of oil spill domain central point drift trend curve considering the initial thickness of oil spill layer at the oil spill central point is used. Next, the method of oil spill domain determination dependent on the thickness of oil spill layer for various hydro-meteorological conditions is presented. The generalization of the presented approach assuming that the thickness is changing with time is also proposed. At the end, the research further perspective is given.

6

M/t “Baltic Carrier” accident. The reconstruction of oil spill with PISCES II simulator application

88%

Łazuga K. , Gucma L. , Perkovic M.

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2013

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tom nr 36 (108) z. 1

110--115

EN

This paper presents reconstruction of the oil spill that occurred as result of an m/t “Baltic Carrier” accident. This reconstruction was carried out with use PISCES II simulator. The result of several simulations could be the step to usability and validation of PISCESS II simulator and as a guideline for setting up this kind of simulations.

7

Determination of the oil spill removal area by oil particle tracking in a harbor

88%

Yang S.-Y. , You X.-Y.

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2016

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tom Vol. 45, No. 2

230--238

EN

The removal of oil spill pollution is an important issue of water environment protection. A hydrodynamic model for the determination of oil spill removal area is proposed based on the Euler-Lagrangian particle tracking method. After the results of flow field simulation are validated by the measured data, the trajectory of oil particles is calculated. The optimal location of oil spill removal area is obtained by comparing the oil removal rate of different removal areas. The current method presents a useful way of locating the optimal oil spill removal area to clean the surface waters.

8

Improvement of oil spill fighting by using SAR satellite detection and e-navigation systems

88%

Bąk A.

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2013

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tom nr 36 (108) z. 1

27--31

EN

The article presents the solution for improvement of oil spill fighting with utilization of synthetic aperture radar. The way of identification is presented as well as the treatment of obtained data in order to eliminated “looks like” objects. Such system will widely improve the oil spill fighting at a very early stage of incident.

9

Treatment of Contaminated Water from Niger Delta Oil Fields with Carbonized Sisal Fibre Doped with Nanosilica from Ofada Rice Husk

88%

Odunlami O. A. , Agboola O. , Odiakaose E. O. , Olabode O. O. , Babalola O. , Abatan O. G. , Owoicho I.

Journal of Ecological Engineering

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2022

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tom Vol. 23, nr 9

297--308

EN

Oil spills contaminate water bodies and hence, cause the death of marine animals. The Niger Delta Oil contaminated water was treated by adsorption using sisal fibre activated carbon (SFAC) doped with silica nanoparticles (SNP) synthesized from Ofada rice husk which was carbonized at temperatures 400 °C and 650 °C. The SNP was synthesized at 600 °C (SNP-1) and 800 °C (SNP-2). The proportion in SFAC: SNP for both temperature values was 4.8:0.2 with a basis of 5 grams of the adsorbent. The samples were characterized by SEM, BET analysis, XRF and XRD. The adsorption equilibrium studies obeyed Langmuir adsorption isotherm; as the linear correlation value was close to unity, with a separation factor of 0.004. SNP-1 shows amophous nature having Fe2O3 and SNP-2 shows crystalline nature which consist of quartz. SNP-2 was used for the study due to its high surface area observed in the BET. High % removal efficiency of 99.84 was attained with silica nanoparticle (SNP-2) integrated in sisal fiber activated carbon (SFAC carbonized at 400 °C).

10

Short-term forecasting of accidental oil spill movement in harbours

88%

Dąbrowska E.

Safety and Reliability of Systems and Processes

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2021

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tom Summer Safety and Reliability Seminar 2021

59--75

EN

The general model of oil spill movement forecasting based on a probabilistic approach is proposed. A semi-Markov model of the process of changing hydro-meteorological conditions is constructed. The method of oil spill domain determination for various hydro-meteorological conditions is recommended. Moreover, Monte Carlo simulation procedure for predicting the oil spill domain movement is proposed. The procedure is practically applied for Gdynia and Karlskrona ports' water areas.

11

Use of satellite data in monitoring of hydrophysical parameters of the baltic sea environment

75%

Krężel A. , Bradtke K. , Herman A.

Polish Maritime Research

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2015

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tom nr 3

36--42

EN

Intensive development of infrastructure for fast processing of outsized amount of space-borne data enables now to use the satellite data for operational controlling the state of its environment. In our presentation we show some examples of analysis of processes in marine environment which are possible due to satellite data and algorithms of its processing developed in SatBaltic Project. It concerns supporting of modelling of solar energy inflow to the sea with space-borne input data, identification and analysis of sea ice cover, supporting of oil spill detection, and identification of phenomena which modify spatial distribution of the sea surface temperature.

12

Oil Spill Models: A State of the Art of the Grid Map as a Function of Wind, Current and Oil Parameters

75%

Mazurek J. , Smolarek L.

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

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2013

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tom Vol. 7, no. 1

19--23

EN

An integrated model, which contains flow and transport‐fate modules, will be presented for simulating transport and fate of oil spills at seas. The flow module uses different kinds of meshes that provide great flexibility for modeling the flow in complex geometries of currents and barriers. The refined grid resolution in regions of interest is important. Horizontal diffusion is simulated using random walk techniques in a Monte Carlo framework, whereas the vertical diffusion process can be solved on the basis of the Langeven equation. The model contains the most significant processes which affect the motion of oil particles. For a better fit to the curvature of the coastline there are used unstructured non overlapping rectangular or triangle grid cells. Special attention must be paid to choose the horizontal and vertical resolution in simulating the oil trajectory in the coastal area.

13

A model for oil spill scenarios from tanker collision accidents in the Northern Baltic Sea

75%

Goerlandt F.

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tom nr 50 (122)

9--20

EN

Oil spills from maritime activities can lead to very extensive damage to the marine environment and disrupt maritime ecosystem services. Shipping is an important activity in the Northern Baltic Sea, and with the complex and dynamic ice conditions present in this sea area, navigational accidents occur rather frequently. Recent risk analysis results indicate those oil spills are particularly likely in the event of collisions. In Finnish sea areas, the current wintertime response preparedness is designed to a level of 5000 tonnes of oil, whereas a state-of-the-art risk analysis conservatively estimates that spills up to 15000 tonnes are possible. Hence, there is a need to more accurately estimate oil spill scenarios in the Northern Baltic Sea, to assist the relevant authorities in planning the response fleet organization and its operations. An issue that has not received prior consideration in maritime waterway oil spill analysis is the dynamics of the oil outflow, i.e. how the oil outflow extent depends on time. Hence, this paper focuses on time-dependent oil spill scenarios from collision accidents possibly occurring to tankers operating in the Northern Baltic Sea. To estimate these, a Bayesian Network model is developed, integrating information about designs of typical tankers operating in this area, information about possible damage scenarios in collision accidents, and a state-of-the-art time-domain oil outflow model. The resulting model efficiently provides information about the possible amounts of oil spilled in the sea in different periods of time, thus contributing to enhanced oil spill risk assessment and response preparedness planning.

14

Optimum site selection for oil spill response center in the Marmara Sea using the AHP-TOPSIS method

75%

Koseoglu B. , Buber M. , Toz A. C.

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tom Vol. 44, no. 4

38--49

EN

The aim of this study is to determine the optimum location for an oil spill response center in the Marmara Sea. The analytic hierarchy process (AHP) and technique for the order of preference by similarity to ideal solution (TOPSIS) method as the most preferred multi-criteria decision-making (MCDM) technique were used. The results reveal that the LOC criterion and PRA sub-criterion have the highest effects on the optimal location selection of the oil spill response center. According to the results, the most suitable location for the oil spill response center in the region is Izmit Bay Entrance. This location has been proposed for the response headquarters to manage the whole operation with the assistance of auxiliary installations in the area. In this study, only technical and operational variables are taken into account, but political and administrative criteria are excluded.

15

On deck oil spill clean-up materials – solution for engine rooms

75%

Ubowska A. , Jowtuch K.

New Trends in Production Engineering

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2018

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tom Vol. 1, Iss. 1

11--18

EN

The presence of flammable substances nearby hot surfaces in the engine rooms pose a fire hazard. Therefore the quick and effective removal of oil spills from these areas is of utmost importance. The simplest way is to use sorbent materials having the capacity to absorb oil substances. Oil sorbents comprise of a wide range of organic, inorganic and synthetic products. The choice of form and type of sorbent material depends on the intended application: type of spill, its size and location. The article describes the results of studies aimed to compare the absorbency of selected natural and synthetic sorbents in the context of their application in case of an oil spill in the engine room. Although the natural sorbents should not be used in water, because they absorb it and can in addition contaminate the seabed, they can be used to remove oil spills on the ship. After used they can be disposed on the ship by burning.

16

Wpływ trzech rodzajów podłoża na emisję par niebezpiecznych dla środowiska (na przykładzie heksanu) z rozlewisk cieczy palnych i toksycznych

75%

Kulig A. , Gałązka E.

Prace Naukowe Politechniki Warszawskiej. Inżynieria Środowiska

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2012

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tom z. 59

51--65

PL

Celem badań było wykazanie zależności między rodzajem podłoża gruntowego, na którym znajduje się rozlewisko cieczy, a intensywnością odparowania heksanu. Po określeniu metodyki badań laboratoryjnych przedstawiono charakterystyki ubytku masy heksanu i zmian stężenia par nad cieczą w funkcji prędkości przepływu powietrza nad rozlewiskiem. Ubytek masy określano za pomocą precyzyjnej wagi elektronicznej (model Radwag WPS 1200/C/2), pracującej w systemie automatycznym. Wagę ustawiono w tunelu aerodynamicznym o zmiennej sile nadmuchu. Stężenie par heksanu nad cieczą oznaczano za pomocą wieloparametrowego przenośnego analizatora gazów Gasmet™ DX-4000, zawierającego spektrometr FT-IR z transformatą Fouriera widma w podczerwieni. Zebrane przez analizator widmo rejestrowano w programie CALCMET firmy TEMET©. Jednocześnie podczas badań mierzono temperaturę otoczenia i cieczy. Stwierdzono znaczny wpływ prędkości przepływu powietrza nad rozlewiskiem cieczy oraz rodzaju podłoża gruntowego na szybkość parowania heksanu i w konsekwencji – stężenie par zanieczyszczenia w powietrzu.

EN

The aim of the research was to demonstrate the relationship between the intensity of evaporation of hexane and the soil type on which the liquid pool is located. After determining the methodology of laboratory tests, the characteristics of mass loss and concentration of vapour over the liquid are shown as a function of flow rate of air over the oil spill. Loss of weight was determined using an electronic laboratory balance, Radwag WPS 1200/C/2 model, in the system's automatic operation. The weight is set in a wind tunnel with a variable power blower. The concentration of hexane vapour over the liquid surface was determined with a gas analyzer Gasmet™ DX-4000, containing a spectrometer FT-IR with Fourier transform infrared spectra. Gathered by the spectrum analyzer, the measurement was recorded by the program's CALCMET Temet©. During the experiments, data on ambient air and Iiquid temperatures were measured and collected. The authors noted a significant effect of the type of ground and air velocity over the overfIow-hexane on the rate of evaporation of the liquid and consequently the vapour concentrations of pollutants in the air.

17

An improved Otsu method for oil spill detection from SAR images

75%

Yu F. , Sun W. , Li J. , Zhao Y. , Zhang Y. , Chen G.

Oceanologia

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2017

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tom 59

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nr 3

EN

In recent years, oil spill accidents have become increasingly frequent due to the development of marine transportation and massive oil exploitation. At present, satellite remote sensing is the principal method used to monitor oil spills. Extracting the locations and extent of oil spill spots accurately in remote sensing images reaps significant benefits in terms of risk assessment and clean-up work. Nowadays the method of edge detection combined with threshold segmenta- tion (EDCTS) to extract oil information is becoming increasingly popular. However, the current method has some limitations in terms of accurately extracting oil spills in synthetic aperture radar (SAR) images, where heterogeneous background noise exists. In this study, we propose an adaptive mechanism based on Otsu method, which applies region growing combined with both edge detection and threshold segmentation (RGEDOM) to extract oil spills. Remote sensing images from the Bohai Sea on June 11, 2011 and the Gulf of Dalian on July 17, 2010 are utilized to validate the accuracy of our algorithm and the reliability of extraction results. In addition, results according to EDCTS are used as a comparator to further explore validity. The comparison with results according to EDCTS using the same dataset demonstrates that the proposed self-adapting algorithm is more robust and boasts high-accuracy. The accuracy computing by the adaptive algorithm is significantly improved compared with EDCTS and threshold method.

18

Wpływ rozlewu olejowego na skuteczność poszukiwań w trakcie akcji SAR

75%

Górtowski P. , Łazuga K.

Górnictwo i Geoinżynieria

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2011

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tom R. 35, z. 4/1

137-144

PL

Wzrost wydobycia złóż ropy z dna morskiego niesie ze sobą ryzyko zwiększenia się prawdopodobieństwa wystąpienia rozlewu olejowego nie tylko w rejonie eksploatowanych złóż, ale również na trasach uczęszczanych przez statki transportujące ropę naftową i jej produkty. Niniejsze opracowanie porusza tematykę prowadzenia akcji poszukiwania rozbitków przy jednoczesnym wystąpieniu rozlewu produktu ropopochodnego a w związku z tym zagrożeń związanych z przebywaniem zarówno rozbitków jak i ratowników w środowisku toksycznym dla człowieka. Zagrożenia związane z obecnością produktów ropopochodnych na miejscu akcji to między innymi ich łatwopalność, tworzenie się par wybuchowych w powietrzu, obniżenie zawartości tlenu w atmosferze i toksyczność produktu. Artykuł rozważa również wpływ rozlewu olejowego na możliwości lokalizacji rozbitków.

EN

The increase in the extraction of oil from the seabed carries a risk of increasing the likelihood of an oil spill not only in the region of exploited deposits, but also on routes frequented by vessels transporting crude oil and its products. This study moves the driving theme of searching survivors share while petroleum product spill occurs and therefore the risks associated with staying in both survivors and rescuers in environment toxic to humans. Risks associated with the presence of petroleum products on the site include the share of their flammability, formation of explosive vapors in the air, lowering the oxygen content in the atmosphere and the toxicity of the product. Article also considers the influance of an oil spill on the possible of location of survivors.

19

Analiza wpływu rozlewu olejowego na skuteczność poszukiwań w trakcie akcji SAR z wykorzystaniem symulatorów SARMAP i OILMAP

75%

Łazuga K. , Górtowski P.

Górnictwo i Geoinżynieria

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2011

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tom R. 35, z. 4/1

233-242

PL

Niniejsze opracowanie rozważa poszukiwanie człowieka i tratwy ratowniczej w miejscu rozlewu olejowego przy użyciu helikoptera Anakonda, samolotu M-28 X2 oraz statku Kapitan Poinc. Wyniki badań prezentują trajektorię ruchu plamy olejowej, trajektorię ruchu rozbitka ubranego w kombinezon ochrony termicznej i tratwy ratunkowej dla dwóch sytuacji hydrometeorologicznych. Poszukiwania wyżej wymienionych środków ratunkowych odbywają się wg schematów IAMSAR a wyniki poszukiwań przedstawione są w postaci prawdopodobieństwa sukcesu (POS [%]) opartego na prawdopodobieństwie wykrycia rozbitka/tratwy podczas przejazdu po ustalonej trasie oraz prawdopodobieństwie znalezienia się rozbitka/tratwy w wyznaczonym obszarze poszukiwań.

EN

This paper considers the human search and rescue raft search in the place of oil spill using the Anaconda helicopter, aircraft M-28 X2 and the ship Captain Poinc. Results represent the trajectory of movement of oil slick, the trajectory of motion of surviver dressed in survival suit and life raft for two hydrometeorological situation. The search for life-saving measures mentioned above are held by schemes IAMSAR. Search results are presented in the form of the probability of success (POS [%]) based on the propability of detection and probability of containment.

20

Przewidywanie rozprzestrzeniania się rozlewu olejowego wywołanego potencjalnym wyciekiem na platformie wydobywczej w północno-wschodniej części Morza Kaspijskiego w warunkach zalodzenia

75%

Dzikowski R. , Głogowski P.

Górnictwo i Geoinżynieria

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2011

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tom R. 35, z. 4/1

109-115

PL

W artykule scharakteryzowano zagadnienie predykcji rozlewu olejowego na akwenie Morza Kaspijskiego przy specyficznych warunkach hydrometeorologicznych [4]. Dokonano symulacji rozprzestrzeniania się plamy olejowej w funkcji prędkości i kierunku wiatru oraz zmiennych prądów morskich. Przeanalizowano przemieszczenie się plamy olejowej w okresie zimowym pod warstwą lodu oraz w paku lodowym.

EN

The article presents simulation method for prediction of potential crude oil spill at north-eastern part of the Caspian Sea with various weather parameters. Authors emphasized the danger of the oil spillage on the area of the Caspian Sea due to the specific environmental conditions.