| reservoir, water samples were collected during July 2011 to November 2012. And the pollution status was evaluated
with the single and comprehensive index methods. Heavy metals and antibiotics concentration of Duobao reservoir water
were also detected. The possible sources of the pollution were also discussed in detail. The single index evaluation results
showed that the annual average values in the main part water of Duobao reservoir were over the standards of grand V for
the surface water environment quality of China. The main pollution factors were total phosphorus, total nitrogen, ammonium
nitrogen and BOD. And the organic pollutant comprehensive index method evaluation results indicated that the main part
water of Duobao reservoir were ranked ordinary level in winter and ranked polluted seriously or moderately level in other
seasons. The main sources of pollution may be the wastewater discharged from pig breeding farms in the upstream. The
water in the discharge area of pig farm waste water was serious polluted and the water quality was over the standards of
Grand V. The main pollution factors were the same as in the main water body. In the main water, the concentration泽of Cu,
Zn, As were very low even 糟燥怎造凿灶鸳贼detect, only the Mn contents exceeded the standards for the surface water environment
quality in the spring and autumn. Chloramphenicol and tetracycline 憎藻则藻detected in the reservoir water, and its content of
water in the vicinity of pig farms reached 5.35 and 18.56 滋g/L袁respectively. These results indicated that Duobao reservoir
pollution mainly came from the pig farms discharging waste water in upstream |
