The study refers to the appreciation of surface water quality, respectively the Timiş and Bega streams, in the inferior sector. The qualitative evaluation of the two water streams, was carried out based on data from the Banat Water Basin Administration archive, from the upstream sections Timişoara and Otelec, the Bega river, respectively Şag and Grăniceri on the Timiş river, based on the analytical results of the following indices: pH, dissolved oxygen, CBO5, CCOCr, electric conductivity, ammonium, nitrates, nitrites, phosphates, sulphates, chlorine, manganese and iron. The analysed data are from the time interval 2011 – 2012. Data interpretation was carried out according to the regulations of Order no. 161 from 2006 for the approval of the Normative regarding surface water quality classification in order to establish the water bodies ecologic state. In parallel, the main anthropic activities were identified, which determine a depreciation of the surface water quality state. The research has shown some qualitative differentiations monitored in the control sections at the beginning of the study area and downstream, from the end of this area, qualitative differentiations determined by: the crossing of the agricultural area by the water, over-flowing of waste waters incompletely cleaned or raw waste waters (by accident), the carrying out of zootechnical activities present or past. With most monitored indices in the control entrance of the study area, respectively upstream Timişoara (on the Bega river) and Şag (on the Timiş river) show values corresponding to the 1 st quality class, and downstream, on exiting this area, respectively Otelec (on the Bega) and Grăniceri (on the Timiş), one may notice the higher frequency of 2 nd quality class indices. Among potential pollution sources, there are: SC Smithfield Ferme SRL, the Cinder Deposit Utvin, the Urban Waste Deposit Parţa etc. Considering the „communication” between surface water and underground water layers, the latter’s quality may suffer negative changes under certain environmental conditions.

water stream, quality, pollution, impact

Presentation: oral