Abstract:

Ganyu port and Dafeng port were the emerging ports zone in Jiangsu coastal area.In order to study the characteristics and status of heavy metals in surface sediments of the two ports,field survey was carried out in March 2013 (Ganyu port) and March 2008 (Dafeng port)．Based on the investigation data of heavy metals,we carried out geostatistics analysis and pollution states evaluation.The geostatistics analysis results of Ganyu port showed that the contents of Cd,As,Cu,Pb,Cr,Zn were 0.049 3-0.098 7,7.3-17.8,19.9-41.2,13.2-19.2,27.5-54.2,43.8-81.2 mg/kg,respectively.The spatial distribution showed a seaward increasing trend,and landbased sources of pollution might be the main cause.Correlation analysis and cluster analysis of factors indicated that Zn and Cu had the same or similar source,and the source of As had significant difference against other heavy metals.The geostatistics analysis results of Dafeng port showed that the contents of Cd,As,Cu,Pb,Cr,Zn were 0.037 8-0.229 0,5.7-19.0,3.2-27.5,10.0-231,62.0-87.0,32.0-85.9 mg/kg,respectively.The spatial distribution showed significant variations among regions,probably because of the strong marine hydrodynamic conditions of Xiyang tidal channels.Correlation analysis and cluster analysis of factors indicated that most of the heavy metals (except Cr) had the same or similar source.The index of pollution evaluation indicated a lower pollution degree in the two ports.The three evaluation methods had different pollution assessment results,with the use of different reference values.The early survey and evaluation of marine sediment in ports could not only reflect the initial deposition of marine environmental conditions,but also providing a reference for environmental impact assessment and the port industry selecting