Abstract: The assessment of water quality was carried out before and after establishment of artificial reef area of Zhangzi Island based on the water environmental data from background survey in summer of 2010 and four surveys from summer of 2011 to summer of 2014 by eutrophication index（E），organic pollution index（A）and water quality comprehensive evaluation method.The results showed that the content of inorganic nitrogen（DIN）was reduced from（0.602±0.020）mg/L before construction of the artificial reef to（0.053±0.010）mg/L in summer of 2014 after construction of the artificial reef and that the content of inorganic phosphorus（DIP）was decreased from （0.033±0.005）mg/L before construction of the artificial reef to（0.016±0.004）mg/L in summer of 2014 after construction of the artificial reef，greater fluctuation in nitrogen level than in phosphorus level.The content of dissolved oxygen（DO）was higher than 6 mg/L in the artificial reef area except for the No.4 station in 2011，and chemical oxygen demand（COD）was increased up to 6-7 mg/L in 2011，compared with the 3-4 mg/L in other years.The contents of Pb and Cd were significantly reduced，and the average water A was decreased from 0.045± 0.004 before construction of the artificial reef to-0.277±0.002 after construction of the artificial reef in 2014，water quality level from good to excellent.The average eutrophication was decreased from 1.45±0.04 before construction of the artificial reef to 0.41±0.04 after construction of the artificial reef，water quality level from eutrophication to poor eutrophication.The comprehensive evaluation value revealed that the descending order of the water quality in the artificial reef was ranged as areaⅡ（Dahao Island）＞Ⅰ（Dalian Island）island area＞Ⅲ（Xiaohao Island），indicating that water quality was improved after construction of the artificial reef.
刘永虎, 程前, 田涛, 陈勇, 尹增强, 刘汉超, 王月. 大连獐子岛人工鱼礁海域夏季水质变化与评价[J]. 大连海洋大学学报, 2016, 31(3): 331-337.
LIU Yong-hu, CHENG Qian, TIAN Tao, CHEN Yong, YIN Zeng-qiang, LIU Han-chao, WANG Yue. Evaluation and changes in water quality at artificial reef area in Zhangzi Island in Dalian in summer. Journal of Dalian Ocean University, 2016, 31(3): 331-337.
2016, Vol. 31 
