Vol.16 – 2010 – No.2

An analytic hierarchy process approach to the analysis of ship length factor in the Strait of Istanbul

Tuba Keçeci, Cemil Yurtören

Istanbul Technical University Faculty of Maritime, Tuzla 34940, TURKEY

Abstract

The Strait of Istanbul is an ‘S’-shaped narrow channel of difficult nature with heavy, complex and irregular currents, and sharp turns. Due to these characteristics, the Strait is considered to be one of the most critical waterways in the world. The density of maritime traffic has increased from an annual count of 4500 ships in 1936, when the Montreux Convention was signed to regulate navigation in the Straits, to a current average of 54,000 vessels per year. This increase in traffic density has led to the rise in the number of maritime casualties. In order to cope with this problem, Maritime Traffic Regulations in the Turkish Straits were established in 1994 and revised in 1998. In these regulations, the concept of a large vessel came to the fore and is defined in the definitions and abbreviations: Article 2. When considering the increase in length of vessels passing through the Strait of Istanbul, the question, ‘What is a large vessel?’ becomes important. This paper investigates what a large vessel is in terms of its length factor in the Strait of Istanbul. In this study, experts from VTS, pilot captains of the Strait of Istanbul and experienced captains are consulted.The AHP method is utilized to identify the quantitative importance of each efficient and some future works are suggested as a result of the findings.

Keywords: Maritime traffic management criteria, decision making, AHP method, the Strait of Istanbul

References

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Keçeci ,T. (2010). The Analysis of the Effects of Ship Length Factor to Safe Navigation in the Strait of Istanbul by Al-IP Method. Istanbul Technical University. Institute of Science and Technology, Istanbul. pp.51

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First record Bellottia apoda Giglioli, 1883 (Bythitidae), from the Eastern Mediterranean coast of Turkey

Deniz Ergüden, Cemal Turan, Deniz Yağlıoğlu, Mevlüt Gürlek

Fisheries Genetics Laboratory, Faculty of Fisheries, Mustafa Kemal University, 31220 Iskenderun, Hatay, TURKEY

Abstract

One specimen of Bellottia apoda Giglioli, 1883 was caught by a bottom commercial trawler at a depth of 155 m on 28 October 2009. This is the first record of B. apoda in Turkish waters of Eastern Mediterranean. Morphometric and meristic characters of B. apoda caught are described.

Keywords: Bellottia apoda, Bythitidae, Eastern Mediterranean Sea, first record

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A review of fish fauna in the Turkish Black Sea

Çetin Keskin

Istanbul University, Fisheries Faculty, Ordu St. No: 200, 34470 Laleli, Istanbul, TURKEY

Abstract

This review showed that a total of 161 fish species inhabit in the Turkish Black Sea according to previous studies. Atlanto-Mediterranean species consisted 62.73% of total fish fauna, 6.83% cosmopolitan, 28.57% endemics and 1.86% introduced species such as, Liza haematocheila, Sphraena obtusata and Salmo salar. For the protection of the fish diversity in the Black Sea needs to establish marine protected areas, get under control of illegal, unreported and unregulated fisheries, regional cooperation and concerted action.

Keywords: Marine fishes, Black Sea, Turkey

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A preliminary assessment of the water and air quality parameters in and around the Lake Yeniçağa coast

Mesut Doğan, Bayram Kızılkaya

Istanbul University, Faculty of Letters, Department of Geography, İstanbul, TURKEY
Canakkale Onsekiz Mart University, Science and Technology Application and Research Center-Central Laboratory, Çanakkale, TURKEY

Abstract

The Lake Yeniçağa is located in the interiors of Western Black Sea, within the borders of the city Bolu and in the north of the town Yeniçağa. It is just in the middle of the Çağa Depression 285 km away from Istanbul and 153 km from Ankara. The Çağa Creek with its 8 branches (Hamzabey, Güzviran, Kaymaz, Ömerli, Kirenli, Fındıklı, Aksu and Kayışlar) flows into the lake. Of these branches, Kaymaz, Ömerli, Kirenli and Fındıklı drift the pollutants from TEM highway, Güzviran the ones from D-100 highway and in addition Hamzabey and Aksu drift agricultural wastes into the lake. This study provides prelimary results obtained from water and lichen samples collected from the Lake Yeniçağa and its surroundings, located in the interiors of Western Black Sea, within the borders of the city Bolu. We aimed to highlight some indicators of pollution parameters, including the quality of water and air in and around the lake, on the basis of ICP-AES and ion chromatography (IC) analysis as well as several measurements results. The results obtained showed an increase in Cl^– and NH₄ levels. In particular, Cl^–, NO₃^-3 and SO₄^-2 in the sample taken from the south of the lake littoral are at two or three times higher amounts. Moreover, some concentration of NO₂^– and NH₄⁺ was detected, which was not identified in the other samples. As a result of analyses of two different lichens (Xanthoria parietina and Diploschistes scruposus) carried out to investigate the effect of traffic load on the air quality around the lake, it was observed that the amounts of Fe and Al markedly increased, suggesting a negative effect of traffic-related particles on the area.

Keywords: Air and water pollution, land use, ICP-AES, ion chromatography, Lake Yeniçağa, Bolu

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Groundwater physico-chemical characteristics of Bredeah area Plain (Oran area – Northwest Algeria)

Lamiae Yebdri, Fatiha Hadji, Lahcen Benaabidate, Benamar Dahmani

Department of Earth Sciences, Faculty of Engineering Sciences, P.O. Box: 119, Tlemcen, ALGERIA
Laboratory of Georesources and Environment, Faculty of Sciences and Technology of Fez, P.O.Box: 2202, Fez – 30000, MOROCCO
Laboratory of Spectrochemistry and Structural Pharmacology, Faculty of Engineering Sciences, P.O. Box : 119, Tlemcen, ALGERIA

Abstract

A varied methodology on the field and laboratory was used for determining the physical and chemical characteristics of groundwater in Bredeah plain. The salinity values are high in the Quaternary aquifer, more than 7g/l whereas conductivity’s reach 14440 μS/cm. Chloride ions contribute significantly to anionic composition and increase up to 2392 mg/l. Conductivity and hardness values and some ions concentrations including chlorides, sulfates and nitrates exceed the WHO standards of drinking water. In Bredeah area, water is generally is of poor quality. For drinking water supply of Oran city, this water is demineralized by the reverse osmosis (RO) process.

Keywords: Miocene limestone, Quaternary alluvia, salinity, demineralization

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An alien jellyfish Rhopilema nomadica and its impacts to the Eastern Mediterranean part of Turkey

Bayram Öztürk, Melek İşinibilir

Department of Marine Biology, Faculty of Fisheries, Istanbul University, Istanbul, TURKEY

Abstract

An alien scyphomedusa Rhopilema nomadica human health, tourism and fisheries Mediterranean coast of Turkey. The painful stings of jellyfish may pose a danger to holiday makers. A monitoring programme is recommended for the impacts on tourism, human health and fisheries to mitigate of the effect of this jellyfish.

Keywords: Rhopilema nomadica, Mediterranean coast of Turkey, invasive species

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