Dalian bay sea water quality and pollution trend analysis

in this paper,according to the monitoring data of Dalian bay waters near 2011,different evaluation methods were used respectively to evaluate the water quality situation of Dalian bay waters.And according to the 2007-2011for five consecutive years of monitoring data,the waters of the ocean pollution trend analysis.The results show that the main pollutants are inorganic nitrogen in sea,bay are in a state of eutrophication of the monitoring,the organic matter pollution.The main pollution factor from the terrigenous pollution.In addition to the inorganic phosphorus in five years the rest each factor has different degrees of pollution in trend,with the increasing trend of dissolved oxygen in the most significant.