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Magnetometry as a Tool to Estimate the Pollution of Marine Environment Around Small Shipwrecks (Gulf of Gdańsk) – Preliminary Results

Gwizdała M., Jeleńska M., Łęczyński L.

Acta Geophysica

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2016

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Vol. 64, no. 5

1691--1702

EN

Magnetic properties of deposits around the shipwrecks (“Munin” and “Abille”) in the Gulf of Gdańsk were investigated. Values of magnetic susceptibility (χ) are relatively low; however, they reveal significant differences between investigated sites. The values of χ around “Abille” wreck were 5-8×10-8 m3 /kg. Around “Munin” wreck results were more diversified reaching value of χ between 3.07×10-8m3 /kg and 12.92×10-8 m3 /kg. The spatial variability of χ coincided with near-bottom water currents distribution in the Gulf of Gdańsk. Magnetic minerals were identified by thermomagnetic analysis. Around “Abille” wreck we have found magnetite with small amount of maghemite or hematite. The “Munin” sediments include only one magnetic phase; in several samples it is magnetite, in the others – maghemite. Day–Dunlop plot shows that “Abille” set is shifted towards lower magnetization ratio and higher coercivity ratio. The correlation between the distribution of χ and hydrodynamic condition around shipwrecks allows to determine the direction of contaminant transport.

2

The influence of motor shipwrecks on the marine environment based on the example of the Stuttgart hospital shipwreck

Hac B.

Logistyka

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2015

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nr 4

1660--1666, CD2

PL

Program oceny charakteru i wielkości oddziaływania na środowisko w pobliżu portu w Gdyni, prowadzony przez Instytut Morski w Gdańsku, jednoznacznie wskazał, że spośród kilkunastu przebadanych wraków, najbardziej niebezpieczny jest wrak statku s/s Stuttgart, który osiadł w okolicach Gdyni. Jest on sztandarowym przykładem nieudanej próby usunięcia powojennego wraku, która nie uwzględniała wpływu na środowisko naturalne. W pobliżu wraku zidentyfikowano katastrofalnie wysokie zanieczyszczenie osadów dennych i zmniejszanie się oznak życia biologicznego. Celem dalszych działań jest zatem uzyskanie informacji niezbędnych do usunięcia zanieczyszczenia i ograniczenia ich wpływu na ekosystem Zatoki Gdańskiej.

EN

The program of surveying the negative impact of motor vessel wrecks on the environment and ecosystem of the southern Baltic carried out by the Maritime Institute in Gdańsk unequivocally indicated that out of a couple dozen of surveyed wrecks the most dangerous is the wreck of the Stuttgart ship which has settled in the vicinity of Gdynia. It is a flagship example of badly executed war wreck removal, which did not take into account its further impact on the environment. Catastrophically high contamination of bottom sediments and reduced signs of biological life were identified in the vicinity of the wreck. The aim of further activities is to obtain information necessary for the operation of removing the contamination and limiting the impact of contaminants entered into the ecosystem of the Gdańsk Bay by the wreck.

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Ocena ryzyka zanieczyszczenia środowiska morskiego przez substancje pochodzące z wraków - problemy analityczne

Rogowska J., Namieśnik J.

Analityka : nauka i praktyka

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2009

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nr 3

52-54