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Phytoplankton community of the area before the outflow of river Crn Drim from the Lake Ohrid
2003
Patceva, S. | Mitic, V. (Hidrobioloski zavod, Ohrid (The Former Yugoslav Republic of Macedonia))
During the period February 1999 - February 2000 samples of water taken monthly from the area before the outflow of river Crn Drim from the Lake Ohrid, in purpose of qualitative and quantitative investigation of phytoplankton community. During the period of investigation, the phytoplankton community was characterized by forms of Cyanophyta, Bacillariophyta, Chlorophyta, Chrysophyta, Pyrrophyta and Euglenophyta. Qualitative analysis indicated that algae of the division Chlorophyta and Bacillariophyta are dominant in the phytoplankton, while the results of the qualitative analysis showed that forms of Bacillariophyta are dominant. Seasonal dynamics of phytoplankton is characterized by autumnal and winter domination of Bacillariophyta, spring maximum of Chrysophyta and summer domination of Pyrrophyta. The total number of algae varied between 1500-95,700 ind/l in August and February 2000, respectively.
Show more [+] Less [-]The contribution to the knowledge phosphorus balance in the Crnojevica river water [Montenegro, Serbia&Montenegro]
2003
Djuraskovic, P. (Hidrometeoroloski zavod Crne Gore, Podgorica (Serbia and Montenegro)) | Kojovic, A. | Vujovic, A. | Filipovic, S.
The paper gives the contribute to analyses of the problem of Crnojevica river (Montenegro, Serbia&Montenegro) water pollution. The analyze surround measurement the next parameters: pH, conductivity, oxygen balance, sanitary parameters, content of different form of phosphorus. These measurements are carried out over five sampling series, at the seven stations, including underground flow rate in the Obod cave. Our estimations are confirmed the continuity of the Crnojevica river pollution, by municipality and strain water from Cetinje urban area. Nutrients, especially phosphates, from the pollution emission, attend conditions (together with many natural factors) for production biomass quantity. The opposite processes, the inhibition processes, exist. Phosphorus in the water attends increase level of the water pollution (over increase eutrophication degree), so the water is out of the legal class, because its usage is limited.
Show more [+] Less [-]Water quality of Moraca river [Montenegro, Serbia&Montenegro] from chemical aspect, in the period 1998-2002, in the light of the existing regulation
2003
Tomic, N. (Hidrometeoroloski zavod Crne Gore, Podgorica (Serbia and Montenegro)) | Vulovic, Lj. | Vujovic, A. | Filipovic, S.
The results of the regular water quality monitoring in the river Moraca (Montenegro, Serbia&Montenegro), are presented in this paper. Thirty samples have been processed from six measuring station along the river's flow. The data relevant quality indicators (conductivity, dissolved oxygen, chemical oxygen demand, five days biochemical oxygen demand, ammonia, nitrites, nitrates, and phosphates) have been processed in the light of the existing regulations. It has been confirmed that the water quality, from the physical-chemical aspect, varies depending on the measuring location and the hydrological situation. The evaluated condition shows that the water quality gets worse, in the period of the five years, on the profiles of downstream places from Podgorica. The level of decrease gets to deviation from the requested A2CII class. It is particularly shown in the changes of the values for the nutrients and the relevant indicators of the organic pollution (dissolved oxygen, five days biochemical oxygen demand, chemical oxygen demand), which we presume can be consequence of the effect of the algaes during the period of the "low level water".
Show more [+] Less [-]Algal and saprobiological characteristics of river Crnojevica [Montenegro (Serbia and Montenegro)] water in summer period of 2004. Preliminary investigations
2005
Obuskovic, Lj.(Institut za bioloska istrazivanja Sinisa Stankovic, Beograd (Serbia and Montenegro)) | Djuraskovic, P.(Hidrometeoroloski zavod Crne Gore, Podgorica (Serbia and Montenegro))
The river Crnojevica is a subject of lasting manny years physicochemical and microbiological investigations, which show worring pollutants presence into the water current. This work represent preliminary investigations of Crnojevica river water algal flora (phytoplankton and phytoperiphyton), carrying out over summer period of 2004. Aim of the investigation was to point, based on algal analysis, as reliable indicators of water quality and ecological status of an aquatorius, the need to protect the river from permanent communal and industrial waste water pollution. The hyperproduction of phytoplankton in the investigation period was stated, but it varys along the current, in accordance with efluent inflow. On the base of saprobiological analysis of phytoplankton, determinated water quality was in class 2, till the worse was noted at T2 measure place, on the inflow place of Rijeka Crnojevica settlements sewage.
Show more [+] Less [-]Redundance rivers in the confluence of Likorda [Serbia (Serbia and Montenegro)]
2005
Ristanovic, B. E-mail:braristan@yahoo.com | Jokic, I. | Bojanic, D.(Prirodno-matematicki fakultet, Novi Sad (Serbia and Montenegro). Departman za geografiju, turizam i hotelijerstvo)
Redudance rivers are basic hydrographic problem in area of Radjevina. Their appearance to associate for most rivers in the confluence of Likorda river and have character of season. Using method of quantity index the rivers of this region are classified in special hydrological classes. On the basis of this typology the possible models for solution of this problem are given.
Show more [+] Less [-]Determination of lead content in stream water of river Ibar [Serbia (Serbia and Montenegro)] by potentiometric stripping analysis (PSA)
2005
Babincev, Lj.M.(Fakultet tehnickih nauka, Kosovska Mitrovica (Serbia and Montenegro)) E-mail:babicev@ptt.yu | Novakovic, I.D. | Rajakovic, Lj.V.
Potentiometric stripping analysis (PSA) is highly sensitive electroanalytical method for determination of traces of heavy metals. In this paper detection limit and linearity of potentiometric stripping analysis for lead was investigated. Method was successfully used for determination of traces of lead ion (detection limit 5 microgram/cubic dm) in stream water of river Ibar, before and after joint of potential pollutant.
Show more [+] Less [-]Changes in the biocenoses composition and the Zapadna Morava midstream [Serbia (Serbia and Montenegro)] water quality trend
2005
Jurisic, I.(Osnovna skola Vozd Karadjordje, Jakovo (Serbia and Montenegro)) | Markovic, G.(Agronomski fakultet, Cacak (Serbia and Montenegro))
During several years of hydrobiological investigation of the Zapadna Morava river the Medjuvrsje and Stancici localities stood out; the most favourable water quality was registered with the Medjuvrsje reservoir (being constantly of the class 2), whilst, according to all the data obtained over the years, water quality of the Zapadna Morava at Stancici locality was the worts. The Medjuvrsje reservoir is in stable eutrophic phase. The saprobic index value points to a certain water quality improvement. Floristic diversity in the locality of Stancici increased over the years. An increase in the percental share of the oligosaprobity indicator indicates a certain organic load decrease and an improving water quality trend was recorded as indicated by lower saprobic index values.
Show more [+] Less [-]The heavy metals determination in water
2005
Stankovic, S.(Univerzitet u Beogradu, Beograd (Serbia and Montenegro). Tehnolosko-metalurski fakultet) E-mail:slavka@tmf.bg.ac.yu | Markovic, J. | Rajkovic, M. | Rajakovic, Lj.
The aim of this study was to determine the content of heavy metals, cadmium and lead, in drinking water, spring and well water from rural part of south Serbia, as in water of river Jablanica and in the top water. The content of cadmium and lead, a very toxic metals, were studied simulataneously by potentiometric stripping analysis (PSA) in water samples using thin mercury film electrode, as a working electrode, by standard addition method in the presence of supporting electrolyte. The results of content of examined heavy metals obtained in examined water samples by PSA method, are compared with results obtained by using AAS and GF-AAS spectrometry.
Show more [+] Less [-]Protection of water on Belgrade [Serbia and Montenegro] territory through plan documents
2005
Ristic, R.(Sumarski fakultet, Beograd (Serbia and Montenegro)) | Stefanovic, M. | Gavrilovic, Z.
The diffusion of erosive processes in Serbia and frequency of torrential floods are the factors of degradation of environment. Communities in Serbia are obliged to make Plans for announcement of erosive regions and for protection by torrential floods on water courses out of regular system of defense. An example of Belgrade is presented in this paper, where the Plans for announcement of erosive regions and defense by torrential floods were carried out. These documents are the basis for water protection and usage of natural resources on the concept of sustainability.
Show more [+] Less [-]One of the problems encountered in computing low flows for water courses that sporadically dry up
2005
Petkovic, T.(Republicki hidrometeoroloski zavod, Beograd (Serbia and Montenegro)) E-mail:petkovic@hidmet.sr.gov.yu
The paper contains description of potential approaches to better defining of distribution curves parameters for low water levels on water courses that sporadically dry up, also including additional information on the length of dry period. Computed results are given for the example of minimum annual discharge on several rivers in the Velika Morava basin, Serbia (Serbia and Montenegro).
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