Development of a Web-based GIS monitoring and environmental assessment system for the Black Sea: application in the Danube Delta area

2016 ◽  
Vol 188 (8) ◽  
Author(s):  
Ilias N. Tziavos ◽  
Thomas K. Alexandridis ◽  
Borys Aleksandrov ◽  
Agamemnon Andrianopoulos ◽  
Ioannis D. Doukas ◽  
...  
Keyword(s):  
Black Sea ◽  
Environmental Assessment ◽  
Assessment System ◽  
The Black Sea ◽  
Danube Delta ◽  
Web Based ◽  
Delta Area

A voyage to Ancient Greek Harbours on board Limenoscope

2007 ◽  
Vol 7 (1) ◽  
pp. 253-260 ◽  
Author(s):  
T. Theodoulou ◽  
C. Memos
Keyword(s):  
Black Sea ◽  
General Public ◽  
Aegean Sea ◽  
Relevant Information ◽  
The Black Sea ◽  
Ancient Greek ◽  
Web Based ◽  
Database Structure ◽  
Historical Role ◽  
Concise Information

Limenoscope is a web based database aiming at promoting the cultural heritage regarding ancient Greek harbours and disseminate the relevant information equally to the general public and to researchers with an interest in that particular cognitive field. The scope of the project is the realization of a database, where one can search for concise information relevant to the historical role, the topography, the morphology, as well as the technical works and installations of ancient harbours in the Mediterranean and the Black Sea. The Database started off with the registration of harbours located in the Aegean Sea and Cyprus, dating from Archaic to Byzantine times. Special emphasis is laid on the bibliographical update of the data forms of the harbour sites, as well as on the related references in ancient literature. The database enables the locating of these sites on a general map, where photographs, plans etc. are also archived. The principles of the database structure are briefly presented along with an example, that of the harbour of Phalasarna, among the harbours registered therein.

Wave energy potential and variability for the south west coasts of the Black Sea: The WEB-based wave energy atlas

2020 ◽  
Vol 154 ◽  
pp. 136-150 ◽  
Author(s):  
Bilal Bingölbali ◽  
Halid Jafali ◽  
Adem Akpınar ◽  
Serkan Bekiroğlu
Keyword(s):  
Black Sea ◽  
Wave Energy ◽  
The Black Sea ◽  
The South ◽  
Energy Potential ◽  
Web Based ◽  
South West ◽  
The Web

scholarly journals The Black Sea Trout, Salmo labrax Pallas, 1814 (Pisces: Salmonidae) in Romanian Waters

2020 ◽  
Vol 77 (2) ◽  
pp. 9
Author(s):  
Călin LAȚIU ◽  
Daniel COCAN ◽  
Paul UIUIU ◽  
Andrada IHUȚ ◽  
Sabin Alexandru NICULA ◽  
...  
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Danube Delta ◽  
Meristic Characters ◽  
Sea Trout ◽  
Research Fields ◽  
New Information ◽  
Rivers And Lakes ◽  
Recorded Data ◽  
New Hypothesis

The review assembles chronological data on Black Sea trout (Salmo labrax) from Romanian waters and brings up-to-date information related to the distribution of the species. The information used dates from 1909 to 2020 and includes books, articles, digital databases, field observations, and notes from different research fields such as ichthyology, biogeography, genetics, aquaculture, conservation, and ecology. Global distribution, migration, meristic characters, and aquaculture of the species were analyzed based on the recorded data from the specialty literature. New information related to a possible population of Salmo labrax inside the Carpathian Arch was discussed. In Romanian waters the species is found in the Black Sea, Danube, Danube Delta but the current paper proposes a new hypothesis, namely that resident populations can be found in rivers and lakes adjacent to the Carpathian Arch. The highest migration point of the Black Sea trout in the Danube was recorded near Corabia locality, Olt County, (43°46′25″N- 24°30′12″E). In the Danube Delta, it was caught in all the three branches (Sulina, Sf. Gheorghe and Chilia), and lagoonary complexes such as Razim-Sinoe. Sexually matured females were caught especially in Spring Season while unmatured specimens were caught in all seasons. Even if the species is protected under Romanian legislation, fishermen and anglers should report its presence when caught accidentally.

scholarly journals Spatio-temporal variations of lateral and atmospheric carbon fluxes from the Danube Delta

2020 ◽  
Author(s):  
Marie-Sophie Maier ◽  
Cristian R. Teodoru ◽  
Bernhard Wehrli
Keyword(s):  
Surface Area ◽  
Black Sea ◽  
Carbon Emissions ◽  
Danube River ◽  
The Black Sea ◽  
Danube Delta ◽  
Carbon Turnover ◽  
Carbon Yield ◽  
River Deltas ◽  
Net Export

Abstract. River deltas with their mosaic of ponds, channels and seasonally inundated areas act as the last continental hotspots of carbon turnover along the land-ocean aquatic continuum. There is increasing evidence for the important role of riparian wetlands in the transformation and emission of terrestrial carbon to the atmosphere. The considerable spatial heterogeneity of river deltas, however, forms a major obstacle for quantifying carbon emissions and their seasonality. While river reaches crossing the delta can serve as reference systems, delta lakes are often dominated by aquatic production and channels act as collection systems for carbon exported from adjacent wetlands. In order to quantify carbon turnover and emissions in the complex mosaic of the Danube Delta, we conducted monthly field campaigns over two years at 19 sites spanning river reaches, channels and lakes. Here we report greenhouse gas fluxes (CO2 and CH4) from the freshwater systems of the Danube Delta and present the first seasonally resolved estimates of its freshwater carbon emissions to the atmosphere. Furthermore, we quantify the lateral carbon transport of the Danube River to the Black Sea. We estimate the delta’s CO2 and CH4 emissions to be 65 GgC yr−1, of which about 8 % are released as CH4. The median CO2 fluxes from river branches, channels and lakes are 25, 93 and 5.8 mmol m−2 yr−1, respectively. Median total CH4 fluxes amount to 0.42, 2.0 and 1.5 mmol m−2 yr−1. While lakes do have the potential to act as CO2 sinks in summer, they are generally the largest emitters of CH4. Small channels showed the largest range in emissions including a CO2 and CH4 hotspot sustained by adjacent wetlands. The channels thereby contribute disproportionately to the delta’s emissions considering their limited surface area. In terms of lateral export, we estimate the net export of the Danube Delta to the Black Sea to about 160 GgC yr−1, which only marginally increases the carbon load from the upstream river catchment (8490 GgC yr−1) by about 2 %. While this contribution of the delta seems small, deltaic carbon yield (45.6 gC m−2 yr−1, net export load/surface area) is about 4-fold higher than the riverine carbon yield from the catchment (10.6 gC m−2 yr−1).

scholarly journals Are the Angels, Barnea candida (Myoida, Pholadidae), Backing to the Danube Delta in the Black Sea?

2017 ◽  
Vol 51 (1) ◽  
pp. 73-74
Author(s):  
B. Alexandrov
Keyword(s):  
Organic Matter ◽  
Black Sea ◽  
Indicator Species ◽  
Aquatic Ecosystem ◽  
Sea Water ◽  
The Black Sea ◽  
Danube Delta ◽  
High Concentration ◽  
Marine Mollusc

Abstract Bivalve marine mollusc Barnea candida (= Pholas candidus) from Pholadidae family is sensitive to the high concentration of organic matter in sea water and recently has been included into the list of indicator species for the Black Sea (Alexandrov, Zaitsev, 2016). Its recording in Ukrainian part of the Danube Delta after more than 60 years since its first registration is probably the evidence of reduction of eutrophication and gradual restoration of local aquatic ecosystem biodiversity.

scholarly journals DESIGNING AND MODELLING COAST MANAGEMENT GIS FOR BOSPHORUS

2016 ◽  
Vol XLI-B4 ◽  
pp. 215-220
Author(s):  
M. U. Gumusay ◽  
O. Ozdemir ◽  
T. Bakirman
Keyword(s):  
Black Sea ◽  
Daily Basis ◽  
The Black Sea ◽  
Marmara Sea ◽  
Distributed Data ◽  
Web Based ◽  
Gis Application ◽  
Maritime Traffic ◽  
Local Transport ◽  
Flow Directions

Web based geographic information systems (GIS) has great potential based on developments in internet and web technology. Web based GIS is a network based tool that takes advantage of internet with visualizing, analysing and accessing of distributed data and analysis functions. With the length of 30 kilometres, the Bosphorus provides an essential zone that offers great maritime traffic services. This shipping way which connects The Black Sea and The Mediterranean Sea through The Marmara Sea, has no alternative and it is substantial for economies of Black Sea countries. The Bosphorus is one of most important natural straits in the world handling 150 transit ships, 23 freighters with dangerous cargo and 2500 local transport ships with 2 million passengers on daily basis. In this study, it is aimed to create a web based GIS application for an effective coast management which includes berthing factors (anchorage areas, currents, submerged, etc.), maritime traffic factors (traffic separation schemes, traffic flow directions), closed areas and other factors (lighthouses, buoys, beacons, etc.) by digitizing printed navigation charts produced by Turkish Naval Forces, Office of Navigation, Hydrography and Oceanography.

scholarly journals Effects of methane outgassing on the Black Sea atmosphere

2006 ◽  
Vol 6 (3) ◽  
pp. 3611-3626 ◽  
Author(s):  
K. Kourtidis ◽  
I. Kioutsioukis ◽  
S. Rapsomanikis
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Danube Delta ◽  
Substantial Impact ◽  
Mixing Ratios ◽  
The Crimea ◽  
Methane Fluxes ◽  
Very High ◽  
Detector Saturation ◽  
Methane Concentrations

Abstract. Methane in air and seawater was measured in the Eastern Black Sea during the 10–18 December 1999 BIGBLACK project cruise. The measurements allowed for the calculation of supersaturation ratios and methane fluxes across the air-sea interface. CH4 mixing ratios in air were generally in the 1.8–2.0 ppmv range, while surface (4 m depth) seawater concentrations varied from 5 to 100 ppmv. Above active seep areas, the water was supersaturated at around 500% with respect to the overlying atmosphere. Accordingly, flux densities varied greatly and were up to 4000 umol m-2 day-1. In the Sevastopol harbour, supersaturations up to around 3000%, similar to those at the Danube Delta, were observed, while in the Istanbul harbour supersaturations could not be determined because the very high values of water concentrations have led to detector saturation. Simple modelling shows that the observed fluxes do not have any substantial impact in the methane content of the Black Sea atmosphere, as they could only raise its concentrations by less than 1 ppb. On the other hand, calculations performed as part of the CRIMEA project, show that mud volcano eruptions could episodically raise the methane concentrations well above their regional background for several tens of kilometres downwind.

scholarly journals Citizenship, Nation-and State-Building: The Integration of Northern Dobrogea into Romania, 1878-1913

2002 ◽  
pp. 86 ◽  
Author(s):  
Constantin Iordachi
Keyword(s):  
Fifteenth Century ◽  
Ottoman Empire ◽  
Black Sea ◽  
Balkan Peninsula ◽  
State Building ◽  
The Black Sea ◽  
Danube Delta ◽  
Southeastern Europe ◽  
The West ◽  
The North

Situated in the northeastern extremity of the Balkan Peninsula, between the lower Danube and the Black Sea, the historical province of Dobrogea has a highly individualized geographical character. The arid steppes in the middle of the province are surrounded by an extensive seacoast in the east, the vast Danube delta in the north, the fertile shores of the Danube in the west, and by the Bulgarian mainland in the south, making up a broad ribbon of land, a kind of "irregular oblong with a waist" (see Map I, page ll).This advantageous geopolitical and commercial location accounts for Dobrogea's tumultuous history. From fifteenth century, Dobrogea functioned as a borderland of the Ottoman Empire and one of the most advanced Muslim military bastions in Southeastern Europe.

scholarly journals DESIGNING AND MODELLING COAST MANAGEMENT GIS FOR BOSPHORUS

2016 ◽  
Vol XLI-B4 ◽  
pp. 215-220
Author(s):  
M. U. Gumusay ◽  
O. Ozdemir ◽  
T. Bakirman
Keyword(s):  
Black Sea ◽  
Daily Basis ◽  
The Black Sea ◽  
Marmara Sea ◽  
Distributed Data ◽  
Web Based ◽  
Gis Application ◽  
Maritime Traffic ◽  
Local Transport ◽  
Flow Directions

Web based geographic information systems (GIS) has great potential based on developments in internet and web technology. Web based GIS is a network based tool that takes advantage of internet with visualizing, analysing and accessing of distributed data and analysis functions. With the length of 30 kilometres, the Bosphorus provides an essential zone that offers great maritime traffic services. This shipping way which connects The Black Sea and The Mediterranean Sea through The Marmara Sea, has no alternative and it is substantial for economies of Black Sea countries. The Bosphorus is one of most important natural straits in the world handling 150 transit ships, 23 freighters with dangerous cargo and 2500 local transport ships with 2 million passengers on daily basis. In this study, it is aimed to create a web based GIS application for an effective coast management which includes berthing factors (anchorage areas, currents, submerged, etc.), maritime traffic factors (traffic separation schemes, traffic flow directions), closed areas and other factors (lighthouses, buoys, beacons, etc.) by digitizing printed navigation charts produced by Turkish Naval Forces, Office of Navigation, Hydrography and Oceanography.

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