Abstract:Heavy metals in sediments of Xixi Wetland were researched. Effects of protection measures, sediment dredging and water types on heavy metal content were discussed. The results indicated that mean contents of Cu, Zn, Cr, Pb, Cd, Hg and As were lower than the second grade standard of Chinese environmental quality standards for soils (GB 15618-1995). Hg and As were lower than the background values of agriculture soils in Hangzhou City, while Zn, Cr, Pb and Cd were higher than that. The various correlations of heavy metals indicated a multi-source of sediment pollutants. Zn and Cd contents in sediments were higher than that in soils, which indicated different sources of heavy metals in sediment and soils. Spatially, the pollutant contents were lower in center wetland (first phase project) than that in outside. And the accumulation of heavy metals had been reduced in center wetland, while it was improved in outside areas which were being disturbed by human activities more frequently. Heavy metal contents were higher in sediment of closed pounds or big pools than that in general watercourses as water types had also effects on the heavy metal contents in sediment. The H kanson integrated potential ecological risk of Xixi was light as the mean integrated index was low (110.9). Cd and Hg were in medium levels, which had the heaviest contribution to integrated potential ecological risk, while other 5 metals had low levels of risk. And the results concluded from American National Oceanic and Atmospheric Administration of Sediment Quality Guidelines for the sediment risk assessment was different comparing with the H kanson‘s.