Milana PANTELIĆ¹, Dragan DOLINAJ¹, Stevan SAVIĆ¹, Vladimir STOJANOVIĆ¹ & Imre NAĐ^2
1Climatology and Hydrology Research Centre, Faculty of Science, University of Novi Sad; Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia, E-mail: milana.pasic@dgt.uns.ac.rs, dragan.dolinaj@dgt.uns.ac.rs, stevan.savic@dgt.uns.ac.rs, vladimir.stojanovic@dgt.uns.ac.rs,
²Department for Geography, Tourism and Hotel Management, Faculty of Science, University of Novi Sad; Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia, E-mail: imre.nadj@dgt.uns.ac.rs

STATISTICAL ANALYSIS OF WATER QUALITY PARAMETERS OF VELIKI BAČKI CANAL (VOJVODINA, SERBIA) IN THE PERIOD 2000-2009

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Veliki Bački canal (VBC) in Serbia is one of the most polluted water flows in Europe. This paper observes, statistically analyses and describes certain chemical parameters as dissolved O₂, biological oxygen demand (BOD₅), chemical oxigen demand (COD), suspended solids and amount of coliform bacteria, which show canal water quality during the period of ten years (2000-2009). Authors have applied WQI (water quality index) as the most reliable indicator of the watercourses pollution for setting of surface waterflow quality. These parameters are collated to the results of SWQI set of parameters for 2009 as a control year. Results were obtained in different statistical analyses: descriptive statistical analysis, t-test for independent samples and one-way analysis of variance. Post-hok Scheffe test was applied for definition of difference significance between certain groups. Results shows very bad water quality at one observed Control point (4), near setllement Vrbas. All parameters at Control point 4 are out of permissible range, dissolved O₂ 2.07 mg/l, BOD5 93.57 mgO₂/l, COD 42 mgO₂/l, suspended solids 46.37 mg/l and amount of coliform bacteria 197545.45 n/l. Downstream from Vrbas setllement (Control point 4), SWQI set parameters of water quality at other Control points, are in range from bad to quite good.