Assessment of groundwater quality and pollution in the plain area of northern slope of Tianshan Mountains in Xinjiang
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Abstract:
Gr oundw ater is o ne o f t he impor tant w ater sour ces of domestic water , industr y w ater, and ir rig atio n w ater in the pla in area of nor thern slope of T ianshan Mountains in Xinjiang . Based on the pH, T DS, to tal har dness, ammo nia, NO2 - , NO3 - , per2 manganate index , F- , Cl- , and SO4 2- values of 77 g ro undw ater samples in 2011, t he sing le factor metho d w as used to evaluat e gr oundwat er quality and ca lculate the pr opor tions of each ev aluatio n index in different g ro undwater qualit y lev els. Gro undw ater po llution w as assessed based on 18 g ro undw ater samples o f the same observ ation well in 2003 and 2011 using the chem ical com2 ponent co ncentrat ion compariso n metho d, and the v ariat ion t rend of gr oundw ater quality and causes o f g ro undwater pollutio n wer e analyzed. The results showed that gr oundw ater w ith quality level of ? and ? in the unco nf ined and co nfined aquifers ac2 counts for 40. 0% and 47. 6% in 2011, and the water qua lity of unconfined aquifer impro ves w hile the wat er quality of confined aquifer deteriorates.
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