Investigation of aquatic environmental quality and analysis of the dynamics of pollutants in coastal zone--A case study from Haixing County，Hebei Province

The pollution statues of rivers and coastal water and their changes in Haixing County were evaluated．The investigation results showed that the pollution is becoming more serious．Pollutants are mainly from inland sources such as Zhangweixin River，Xuanhui River and Dakou River．The heavy mentals in sea are gradually accumulated during the procedures of making salt in sun．The water quality at Yangcheng reservoir was also investigated．