Characteristics and evaluation of spatial variation of water quality in Bosten lake
Methods such as spatial interpolation,principal component analysis,and the Nemero pollu-tion index were used to analyze and evaluate the water pollution of Bosten lake.According to the re-sult,the total nitrogen(TN),total phosphorus(TP),ammonia nitrogen(NH3-N),potassium per-manganate index(CODMn),suspended solids(SS)and turbidity of Bosten lake water quality indicators indicated an obvious spatial difference,with the concentration of the southwest shore and the northeast shore of the lake being higher than that of central lake.the dissolved oxygen(DO)showed decreasing from east to west,and the pH value increasing from the southwest shore of the lake to the center and the middle zone of the north shore.There was a strong correlation between the water quality indica-tors.The DO and TN,TP,NH3-N,CODMn and turbidity were significantly negatively correlated while TP and TN,NH3-H,CODMn,turbidity,NH3-N and CODMn and turbidity.CODMn and turbidity were significantly positively correlated.Organic matters such as DO,TN,TP,NH3-N polluted the water-front in the lake area heavily,with the pollution level of the south shore being the highest,then the north shore,the west shore,lake centre,followed by the east shore.The results of the pollution as-sessment showed that the east shore,centre and west bank of Bosten lake were lightly polluted with class Ⅲ water quality,and the north shore and the south shore of the lake were medium pollution with class IV water quality.The spatial variation characteristics of water quality could reflect the main pol-lution factors and the pollution level of lake water quality,thus providing a reference for the protection and treatment of water resources in inland lakes in arid areas.
Bosten lakewater qualityprincipal component analysisspatial interpolation of water qualitynemerow pollution index method
NETL
NSTL
万方数据
