خيارات البحث
النتائج 1 - 10 من 22
[The recent flora of vascular macrophyta in the "Vrbas-Bezdan" and "Banatska Palanka-Novi Becej" canals [Serbia, Yugoslavia] as indicator of ecological characteristics and water quality]
1997
Stojanovic, S. (Poljoprivredni fakultet, Novi Sad (Yugoslavia)) | Vuckovic, M. | Zderic, M. | Stankovic, Z. | Kilibarda, P. | Lazic, D.
Status and water quality of watershed area of Timok river [Serbia, Yugoslavia]
1997
Simic, V. | Ostojic, A. | Simic, S. (Prirodno-matematicki fakultet, Kragujevac (Yugoslavia). Institut za biologiju)
The river Timok with its watershed area is one of very imperilled running water on the territory of Serbia (Yugoslavia). By several years investigations of colonies bottoms (phytobenthos, microzoobenthos and macrozoobenthos) and plankton we have found the following: great diversity and specific phytobenthos and bottom fauna (frequency of certain taxa is considerably larger in relation to the other areas, and new taxa have been recorded). Stated specific structure of phytobenthos and bottom fauna have considerably reflected to right estimation of water quality of tested area.
اظهر المزيد [+] اقل [-]Possibilities for mapping pollution in rivers within their basins
1997
Brajkovic, M. (Institut za vodoprivredu "Jaroslav Cerni", Beograd (Yugoslavia)) | Gavrilovic, Z. | Vukmirovic, M. | Dakovic, S.
Problems encountered in evaluating surface water quality arise from the requirements of relevant regulations that these evaluations should be made in the last favourable hydrologic conditions during design flow rate (required minimum flow). However, the major part of measurements of water quality parameters is not performed under such conditions and the result must be corrected for the conditions under required minimum flow. Two possible approaches to solving this problem are presented in this paper and explained using an example of the Juzna Morava river basin up to the Station Korvingrad, Serbia (Yugoslavia). This basin is unhomogeneous regarding its hydrologic characteristics and mass flow of pollutants. The results of analysis are presented in the cartography form using the GIS technology.
اظهر المزيد [+] اقل [-]Water quality in Yugoslav part of the river Tisza [in the period of 1988-1995] evaluated with method of multiobjective iterative compromise optimalization (MICO)
1997
Krizan, J. (Univerzitet u Novom Sadu, Novi Sad (Yugoslavia). TEMPUS centar)
The aim of this paper is to survey and point to the critical parts of this typically valley river in the chosen period of time, which is, because of its low flow, small turbulence and exceptional social and industrial significance, very susceptible to ecological catastrophes. This paper contains the elaborated state of water quality in Yugoslav part of the river Tisza, during two periods of observation, with usual (1988-1991) and specific (1992-1995) river ecosystem exposure to pollutants. The average annual data of concentration for characteristic parameters in the monitoring stations were compared with method of multiobjective iterative compromise optimalization (MICO) of the influence that different categories of polluters have on the river ecosystem. On the basis of analyzed concentrations of selected parameters and results obtained with method of MICO, it is possible to conclude that the improvement in quality of Yugoslav part of the river Tisza has occurred during the period of 1992-1995.
اظهر المزيد [+] اقل [-]Saprobiological evaluation of the river Banja and it's tributary Pocibrava [Serbia, Yugoslavia] by the use of macrozoobenthos as indicator
1997
Markovic, Z. (Univerzitet u Beogradu, Beograd (Yugoslavia). Poljoprivredni fakultet) | Miljanovic, B. | Mitrovic-Tutundzic, V.
There were estimated of water quality of the river Banja and its trubutary Pocibrava, Serbia (Yugoslavia), during the period 1991-1994 by seasonal investigations of benthos fauna composition as bioindicators. The results have shown higher diversity of the Pocibrava bottom fauna community (66 taxa) than in the river Banja (53 taxa) where it was more uniform. Both water flows were receiving some organic loading and by the use of macrobenthos indicator organisms it was concluded that they belong to beta-mesosaprobic water quality class.
اظهر المزيد [+] اقل [-][Estimation of water quality of the Bajski canal [Serbia, Yugoslavia] using chemical and biological parameters]
1997
Pujin, V. | Ivanc, A. | Kojcic, K. | Miljanovic, B. (Prirodno-matematicki fakultet, Novi Sad (Yugoslavia). Institut za biologiju)
In the period of 1993-1996 water quality of the Bajski canal (Serbia, Yugoslavia) was followed using certain chemical and biological parameters. Oxygen control ranged from its deficiency to its supersaturation recorded in spring and early summer which moved down in summer and early autumn. A smaller amount of suspended particles points to a sedimentation process provoked also in the canal bed, clearing the way for the development of macrophytes. A diverse zooplankton showed typical seasonal variations. A total of 73 species was recorded including 13 Protozoa (17.8%), 44 Rotatoria (60.3%), 10 Cladocera (13.7%), and 6 Copepoda (8.2%). In summary, the process of water quality deterioration is less evident in this section of the DTD (Danube-Tisza-Danube) hydrosystem (Serbia, Yugoslavia).
اظهر المزيد [+] اقل [-]The river Tara [Montenegro, Yugoslavia]: water quality, state, problems, protection
1997
Djuraskovic, P.N. | Pejovic, M. (Republicki hidrometeoroloski zavod, Podgorica (Yugoslavia))
The river Tara (Montenegro, Yugoslavia) is under the treatment of the international (UNESCO) and domestic legal protection, so the prescribed quality of its water is the 1st class. Permanent measurement of the water quality of this river shows that due to the influence of the human factor, its quality has been endangered. Examination of the data collected through many years at all the measurement station along its current shows that the quality of water and pollution estimate have changed.
اظهر المزيد [+] اقل [-][Character of pollution and longtime variations of Tamis river water quality]
1997
Cukic, Z. (Univerzitet u Novom Sadu, Novi Sad (Yugoslavia). Prirodno-matematicki fakultet, Institut za hemiju) | Kilibarda, P. | Kojcic, K. | Jovanovic, D.
In this paper, the results of statistical analysis of then years water quality data of Tamis river at the Romanian-Yugoslav border ("Jasa Tomic" Control Station) are presented. Following changes of analyzed water quality parameters at the Romanian-Yugoslav border a strong trend of deterioration has been observed during analyzed period. Because of periodical accidentally high organic content (COD, BOD) and concentration of ammonia and organic nitrogen in river water, it is concluded that upstream discharging of farm waste waters was the main reason of deterioration of water quality along the Yugoslav part of Tamis river.
اظهر المزيد [+] اقل [-][Oligochaeta community as indicator of water quality in the Bajski canal [Serbia, Yugoslavia]]
1997
Djukic, N. | Miljanovic, B. | Maletin, S. | Ivanc, A. (Prirodno-matematicki fakultet, Novi Sad (Yugoslavia). Institut za biologiju)
During the period 1977-1996, Oligochaeta have been studied as indicator of water quality in the Bajski canal, Serbia (Yugoslavia). The locality was characterized by the 13 species from nine genera and two families - Naididae and Tubificidae. Species in genera Limnodrilus, Potamothrix and Branchiura were dominant, defining the environment as natural eutrophic.
اظهر المزيد [+] اقل [-][Copper in the water of the Bor lake basin [Serbia, Yugoslavia]]
1997
Marinkov, Lj. (Institut za bakar, Bor (Yugoslavia). Zavod za PMS, Odelenje za hidrotehniku) | Trajkovic, S. (Univerzitet u Nisu, Nis (Yugoslavia). Gradjevinski fakultet)
The article gives review of concentration of copper in the water of the Bor lake basin. Content of copper in the mud on the bottom of lake and content of copper in the aerosol are analysed. The investigations have shown that the Bor lake is not polluted by copper.
اظهر المزيد [+] اقل [-]