Evaluate the Water Quality and Trend of changes in quality parameters of ‎Kashkan basin

In this paper Kashkan basin from upstream to downstream water quality changes were evaluated. First, the ýprocess of long-term qualitative changes in two branches Kashkan (Khorramabad and Horod) was evaluated. ýMann-Kendall test was used to determine Routing data. For examination of water quality AqQA software ýSchoeller diagram extracted and analyzed for each station. Information needed to assess water quality in terms ýof agriculture was transferred to the diagram Will Cox and Classification of water was determined. At all ýstations trend of discharge, negative and to further Water Quality Indicators the trend was positive. The results ýshowed that in both branch water quality parameters Decreased. Water quality changes after joining the two ýbranch Khorramabad and Herod At the station Poldokhtar was investigatedþ.þý At the station Poldokhtar Many ýparameters were In a range between the value of them In two branches before joining But in some of them ýalso was violated this law and increased At the station Poldokhtar. Due to the reduction in flow rate and ýincrease of quality parameters, the basic premise was proven.ý