渔业科学进展2017，Vol.38Issue(2)：8-15,8.DOI:10.11758/yykxjz.20151021003
渤海中部海区水域夏季环境质量综合评价
Assessment of Environmental Water Quality in the Central Region of the Bohai Sea in Summer
摘要
Abstract
Based on the investigation data from 21 sampling stations in the central region of the Bohai Sea in 2012,and by using Nemerow index,eutrophication index (El),and potential eutrophication assessment model,an assessment was conducted on the environmental quality of water body in the Bohai Sea area.According to the Nemerow index assessment on the 12 indicators including pH,dissolved oxygen (DO),dissolved inorganic nitrogen (DIN),dissolved inorganic phosphorous (DIP),chemical oxygen demand (COD),total petroleum hydrocarbons (TPHs),Cu,Zn,Pb,Cd,Hg,and As,57.1％ of the surface water quality was at slight pollution level or more serious pollution level,33.3％ of the ten meter water quality was at slight and moderate pollution level,23.8％ of the bottom water quality was at slight or more serious pollution level.TPHs was the most important factor in all the contamination factors.Among the 21 surface sea water samples,12 (corresponding to 57.1％) were above the second marine water quality standards when evaluated with single factor index method.The standard-exceeding rates of ten-meter water and bottom water were 42.9％ and 14.3％ respectively.The polluted area was located in the southeast of survey area,next to the Bohai Bay and the Laizhou Bay.The horizontal distribution of sea water quality showed an increasing trend from the coastal area to the middle area.The sea water EI value of the central region of the Bohai Sea except 13 stations in the surface water was less than 1,the results showed that most of the seawater quality in the investigated area was at the poorly eutrophication level.The ratios of N/P in most of the sea water were much higher than Redfield ratios,and the situation of nitrogen limiting in the central Bohai Sea was gradually changing to that of relative lack of phosphate.The nutrients structure has changed into potential eutrophication of phosphorus limiting.关键词
渤海中部/水质/环境质量评价/富营养化Key words
Central region of Bohai Sea/Water quality/Environmental quality assessment/Eutrophication分类
农业科技引用本文复制引用
徐勇,曲克明,赵俊,崔正国,夏斌..渤海中部海区水域夏季环境质量综合评价[J].渔业科学进展,2017,38(2):8-15,8.基金项目
农业部专项“渤海生态环境监测评估”(13-Q52201302)资助[This work was supported by Special Project of Ministry of Agriculture (Monitoring and Evaluation on Bohai Sea Ecological Environment) (13-Q52201302)] （13-Q52201302）
