Study on Water Quality and Change Trends in the Mariculture Zone of Dongzhaigang
LI Shiping;LI Xian;ZHANG Guanglei;YUAN Lei;FU Danfeng;YAN Guoqiang;GU Qianyi;WANG zhangyi;LI Hongwu;Aquatic Product Technical Extending Station of Haikou;Ocean Monitoring Center of Haikou;School of Ocean,Hainan University;
According to the results of water quality monitoring in the Mariculture Zone of Dongzhaigang from 2009 to 2016,we analyzed and evaluated the water quality by single factor index method,organic pollution index method,and eutrophication level method,meanwhile the rank correlation coefficient method was used to analyze the trends of the water quality.Results showed that,in this area,the chemical oxygen demand( COD) was a little exceeding,and the inorganic nitrogen and the active phosphate were seriously out of limitation. From 2009 to 2014,the organic pollution of the zone was the most serious,the eutrophication level was high. The organic pollution and the eutrophication level both slowed down from 2015 to 2016. The trend analysis also showed that the water quality was significantly improved year by year. N and P especially P is still the main pollution factor,so treatment of the pollutants rich in N,P,is the key point to the comprehensive treatment of Dongzhaigang.
【CateGory Index】： X55