Water Temperature Influence on Selected Properties of Surface River Water Throughout the Year (River Nitra)

Vanková V., Petluš P.: Water temperature influence on selected properties of surface river water throughout the year (river Nitra). Ekológia (Bratislava), Vol. 33, No. 2, p. 151-159, 2014.

Assessment of chosen surface water properties was realised as a part of broader research on environmental aspects of urban environment. Analyses of selected physical and chemical water properties, oxygen and temperature regime, neutralisation capacity, selected nutrients and measurements of air temperature was done in monthly intervals during 2012 at three localities. Two of the assessed localities are at river Nitra: Nitra Communal Services and housing estate Chrenová I. The third locality is the oxbow lake of Malá Hangócka river at Nitra City Park. We have assessed the volume of oxygen concentration (O2, mg/l) and oxygen regime, phosphates (P-PO4 -3, mg/l), ammoniac nitrogen (N-NH4 +, mg/l), nitrites (N-NO2 -, mg/l), pH and water temperature (°C) from the collected samples. Out of these analyses the values of the above mentioned indicators, their annual fluctuation and water quality of observed localities were obtained. The influence of human activities on water properties and its quality was further assessed. Statistical methods such as two-factor dispersion analysis without replication and correlation coefficient were applied to validate the correlation of selected surface water properties, water and air temperature and to compare observed localities.