ORIGINAL RESEARCH
Evaluation of BOD5 and CODcr in Water of a National Nature Reserve in Southwestern Slovak Republic
Jaroslav Noskovič, Mária Babošová, Jana Ivanič Porhajašová
 
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Department of Environmentalism and Zoology, Faculty of Agrobiology and Food Resources,
Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
Online publish date: 2017-06-13
Publish date: 2017-07-25
Submission date: 2016-05-31
Final revision date: 2016-12-14
Acceptance date: 2016-12-14
 
Pol. J. Environ. Stud. 2017;26(4):1607–1613
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ABSTRACT:
In 2010, 2011, and 2013 we assessed the water of the Čičov Oxbow National Nature Reserve in the southwestern part of the Slovak Republic for concentrations of organic substances. Collections of samples were realized regularly at monthly intervals, always about in the half of the month. Sampling sites were determined in order to assess the impact of natural and anthropogenic source of surface water quality. The results were compared from the limit values set out in Government Regulation No. 269/2010 Coll. The average value of BOD5 for the whole period was 1.58 mg O2 dm-3. The highest average concentration of biodegradable organic matter was in February and the minimum in May. Depending on the sampling site, we found the highest average value for the whole monitored period in the northeastern part of Čičov Reserve, and the lowest in the sampling site situated approximately 150 m from the mouth of Čilizian Stream in the reserve. The average value of CODCr for the entire monitored period represented 60.69 mg O2 dm-3. Depending on the time of sampling, minimum average value was in February and maximum in September. Depending on the sampling site, we found the highest average value for the whole monitored period in the sampling site located approximately 150 m from the mouth of the Čilizian. The average value of the BOD5/CODCr ratio during the years 2010, 2011, and 2013 was 0.026.
eISSN:2083-5906
ISSN:1230-1485