Evaluation of water environment in Zhangjiajie National Forestry Park

In order to explore the recreational development effects on the water quality in Zhanejiajie National Forestry Park in(Hunan) Province of China,this paper investigated and analyzed the kinds,amount and distribution of water pollutants.With the(available) monitoring data,the water quality of the park was evaluated.The results showed that the main pollution sources were(hotels),restaurants and local dwellers,the main pollutants were leftovers and washing sewage,and the most affected water indices were BOD_5,DO,NH_3-N,COD,MnO~+_4,total P and taxon coliform and etc.Affected by the pollutants mentioned above,the water quality of Golden Whip Brook,one of the main scenic spots of the park,changed obviously,and that of the upper and middle reaches of the brook decreased to Class II.To protect the environment of the park,the discharge of waste water must be lowered,and all the sewage must be collected and dealt to reach the discharging standard.At the same time,it is necessary to close up(or) move some reception facilities which discharge waste water under the standard.