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Contents of phosphorous,heavy metals including cadmium (Cd),chromium (Cr),iron (Fe),nickel (Ni),and zinc (Zn) in the sediment cores of Miyun Reservoir (Beijing,China) were collected and analyzed to reconstruct the history in the reservoir catchment.The natural and anthropogenic influence on temporal changes in phosphorus and heavy metals were quantitatively investigated.EF,geoaccumulation index (Igeo),and ecological risks of heavy metals were used to quantify the contamination intensity,further to identify the sources of phosphorus in the sediments.