The Timok River (202 km long, 4547 km² basin area) is located in East Serbia. It is a right tributary of the Danube River and one of the most polluted watercourses in Serbia. On the basis of the ...data provided by the Republic Hydrometeorological Service of Serbia, the paper presents an analysis of water quality and pollution using the combined physico-chemical WPI index (Water Pollution Index) calculated for two periods - 1993-96 and 2006-2009 at four hydrological stations: ZajeÄar-Gamzigrad (Crni Timok River), ZajeÄar (Beli Timok River), Rgotina (Borska Reka River) and Äokonjar (Timok River). The following parameters were taken into consideration: dissolved O², O² saturation, pH, suspended sediments, Five Day Biochemical Oxygen Demand (BODâµ), Chemical Oxygen Demand (CODá´¹â¿), nitrites, nitrates, orthophosphates, ammonium, metals (Cu, Fe, Mn, Hg, Ni, Zn, Cd), sulphates and coliform germs. The average WPI values were calculated for the observed periods based on the comparison of the annual average values of the listed parameters and defined standard values for the I water quality class (according to the Regulation on the Hygienic Acceptability of Potable Water of the Republic of Serbia). The highest pollution degree was recorded in the Borska Reka River, where heavy metal levels (especially manganese and iron) were significantly increased. These metals are indicators of inorganic pollution (primarily caused by copper mining). Also, increased values of the organic pollution indicators (ammonium, coliform germs, Five-Day Biological Oxygen Demand - BODâµ) in the Borska Reka and the Timok rivers are the result of uncontrolled domestic wastewater discharge.
The Southern Carpathians and the Balkan Mountains define a broad physiographic area, placed at the centre of current debates on the emergence of the earliest Upper Palaeolithic and the Aurignacian ...technocomplex, the migration and dispersal routes of Anatomically Modern Humans in Europe, and the pre- Neolithic and the neolithization of the Balkan area. In this archaeological context and state of research, the Upper Palaeolithic sites from the Lower Danube Valley represent a relevant piece in the jigsaw puzzle of past human land use and mobility patterns. The aim of this article is to investigate the similarity between intraclastic- bioclastic cherts from Giurgiu-Călăraşi area and “Kriva Reka” type of Ludogorie chert from NE Bulgaria, by focusing on their macroscopic and microscopic traits and their geological contexts. The distribution of eluvial and primary deposits of Ludogorie chert types from NE Bulgaria reflects the sedimentary facies belts of the Lower Cretaceous Sea. Also, the alluvial deposits reveal the role played by rivers in the erosion, transport, and redeposition further and further away of the Ludogorie cherts, thus generating an extended area abundant in such materials. The geological distribution of Kriva Reka type similar cherts in Romania was confirmed in alluvial deposits around Giurgiu (Frăteşti Formation, Lower Pleistocene, and Danube’s lower terrace deposits, Upper Pleistocene). The archaeological distribution was confirmed in the Upper Palaeolithic open-air sites from Giurgiu-Malu Roşu, Slobozia-Râpa Bulgarilor, and Nicolae Bălcescu-La Vii. Their use by Boian and Gumelniţa Neolithic communities from southern Romania suggests a long time exploitation of local available cherts.
The classical Karst transboundary aquifer is a limestone plateau of 750 km2 that extends from Brkini hills in Slovenia to Isonzo River in Italy. For 20 years, and especially in the last two years, ...the Mathematic and Geosciences Department of Trieste University has run a monitoring project in order to better understand the groundwater hydrodynamics and the relation between the fracture and conduit systems. A total of 14 water points, including caves, springs and piezometers are monitored and temperature, water level and EC data are recorded. Two sectors are highlighted: the southeastern sector mainly influenced by the sinking of the Reka River, and a northwestern sector connected to the influent character of the Isonzo River. Water table fluctuations are significant, with risings of > 100 m. During floods most of the circuits are under pressure, and only a comparative analysis of water levels, temperature and EC permits a precise evaluation of the water transit times in fractured and/or karstified volumes.
The Kriva Reka River is located in northeastern Macedonia. Only a few manmade facilities, such as canals, dams, embankments, and hydropower plants, have been built along the river. This river type is ...particularly useful for calculating high waters using mathematical and statistical methods. To this end, five theoretical distributions were used in this study: the Gaussian normal distribution, log-normal distribution, Gumbel distribution, Pearson type III distribution, and log-Pearson type III distribution. In order to determine the probability of the occurrence of high waters at the Trnovec gauging station on the Kriva Reka, a period of 39 hydrologic years was processed, each year beginning in October.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
While abiding by the individual, but especially by the collective rules of behavior, and living in an exceptionally isolated geographical area, left on their own, the inhabitants of Gorna Reka (area ...near the border between Macedonia and Albania in the northwest) display a pronounced attachment to specific ritual activities. This paper analyses the collective rituals of the people of Gorna Reka at the level of the village community in general. The analysis is of the apotropeic, protective and initiating power that the activities taken have, which are represented by the collective participation principle (village slava - feast), the delegation principle (vasilicari - participants in St. Basil's Day festivities and dodole - ritual for inducing rain ) and the principle of individual representative (village godfather of St. John's godfathership).
Davis presents, The James Clerk Maxwell Young Writer's Prize, Dr Giovanni Bonny of Nuclear Materials Science Institute, SCK-CEN, Belgium, won the first prize of $1,000 with his paper 'Fitting ...interatomic potentials consistent with thermodynamics: Fe, Cu, Ni and their alloys'. Among others, three runners-up whose papers were awarded the distinction of being highly commended, they were Ignacio A. Figueroa, Reka Trencsenyi and Tao Xu.
Celotno besedilo
Dostopno za:
BFBNIB, DOBA, GIS, IJS, IZUM, KILJ, KISLJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
V članku je predstavljena biogeografska analiza rastlinstva na prodiščih. Rezultati temeljijo predvsem na analizi rezultatov terenskega kartiranja, ki je bilo opravljeno na devetih izbranih prodiščih ...v povirnih krakih reke Save. Obravnavani so bili človekovi posegi v prodišča ter funkcijski pomen prodišč. Na podlagi rezultatov je bil izdelan grafični model sukcesije na izbranih prodiščih.
The Reka river sinking into Skocjan caves (Skocjanske jame) is the main allogenic input into the aquifer of Classical Karst. So far the subsurface flow of the Reka river between Skocjan caves and the ...spring of Timava in Italy has been reached in five caves. Two were recently discovered in Slovenia. Continuous logging of water levels and temperatures in four of these caves was established in spring 2005. The paper presents and briefly discusses the first results obtained in three of them. The results are indicating a fast passage of a flood wave along a well developed conduit system.
Between April 2007 and April 2008, 40 systematic waterbird counts were conducted on the Drava River between Lake Maribor and the Melje Dam (length 8.5 km, area 155 ha) to determine the specific ...composition, abundance and seasonal dynamics of bird occurrence. Between October and May, counts were conducted every week, whereas between June and September they were carried out once every two weeks. In total, 26,803 individuals of 30 species were counted. The number of waterbirds and diversity of species were the highest from late December to late February, when more than 1,000 individuals were regularly present in the area. Waterbirds were distributed along the river unequally, with the highest number of birds present yearround in the city centre and in the first counting sector of Lake Maribor. The Mallard Anas platyrhynchos and Mute Swan Cygnus olor were recorded during every count, while occurrence frequency was greater than 50% in another 10 species. Dominant species in terms of percentage composition were Mallard, Black-headed Gull Chroicocephalus ridibundus, Coot Fulica atra, Mute Swan, Pochard Aythya ferina and Tufted Duck Ay. fuligula. Mute Swan and Mallard were the only breeding waterbirds in the study area. Both the total number of waterbirds and the highest daily total in the first two counting sectors were greater between October and March 1992/93 than in our study. The decline in numbers was the greatest for Mallard, Pochard and Tufted Duck, while an increase was noted in Mute Swan and Yellow-legged / Caspian Gull Larus michahellis / cachinnans. The total number of waterbirds and the number of some species in the study area were significantly higher than expected solely based on its length compared to the length of the lowland Drava in Slovenia (125.7 km). The study area is conservationally important for Pochard, Tufted Duck and Black-headed Gull
Water quality assessment of the Borska Reka river using the WPI (water pollution index) method Milijašević, D., Serbian Academy of Science and Arts, Belgrade (Serbia). Geographical Institute Jovan Cvijić; Milanović, A., Serbian Academy of Science and Arts, Belgrade (Serbia). Geographical Institute Jovan Cvijić; Brankov, J., Serbian Academy of Science and Arts, Belgrade (Serbia). Geographical Institute Jovan Cvijić ...
Archives of biological sciences,
(2011), 2011-00-00, 2011-01-01, Letnik:
63, Številka:
3
Journal Article
Odprti dostop
The Borska Reka river (47 km long, 373 km2 of basin area) is located in eastern Serbia and it is the biggest tributary of the river Veliki Timok. It is also one of the most polluted watercourses in ...Serbia. Using the data of the Republic Hydrometeorological Service of Serbia, the paper analyzes water pollution using the combined physical-chemical WPI index (water pollution index) over two periods: 1993-1996 and 2006-2009. The analysis of parameters showed significantly increased values of heavy metals (especially iron and manganese) which are indicators of inorganic pollution (primarily because of mining), but also increased values of organic pollution indicators (Biological Oxygen Demand-BOD5, ammonium, coliform germs), as the result of uncontrolled domestic wastewater discharge.
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