Eutrophication　can　alter　the　transformation　of　heavy　metals　in　water.　This　study　investigated　the　dynamic　characteristics　and　particle-water　interaction　of　heavy　metals　in　the　waters　of　a　subtropical　eutrophic　reservoir　in　China.　Monthly　concentrations　of　Fe,　Mn,　Cu,　Cr,　Cd,　As,　and　Pb　in　solution　and　suspension　were　analyzed　in　the　Shanzi　Reservoir　from　2013　to　2014　using　inductively　coupled　plasma　optical　emission　spectroscopy.　Results　showed　that　there　were　significant　differences　in　the　dynamic　characteristics　of　heavy　metals.　Suspension　was　the　main　transportation　phase　for　Fe,　Mn,　Cr,　and　Pb,　while　Cd　and　As　existed　mainly　in　solution.　Cu　was　evenly　distributed　between　the　two　phases.　Seasonal　variability　of　the　particle-water　distribution　coefficient　(KD)　showed　lowest　value　during　winter　and　spring　for　Fe　and　Mn,　during　winter　for　Cu　and　Cr,　during　autumn　and　winter　for　Cd,　during　summer　and　winter　for　As,　and　during　spring　for　Pb.　The　low　KD　suggested　a　direct　ecological　hazard　during　these　seasons.　Transport　of　Fe,　Mn,　Cu,　As,　and　Pb　along　the　water　flow　were　generally　consistent　and　transitioned　from　the　suspended　to　dissolved　phase　downstream.　Eutrophication　had　an　impact　on　the　migration　and　transformation　of　Fe,　Mn,　Cu,　Cr,　and　Cd.　This　study　highlights　the　importance　of　thorough　and　regular　monitoring　of　heavy　metals　in　eutrophic　reservoirs　to　reduce　and　prevent　metal　pollution　in　reservoir-type　drinking　water　sources.　©　2019　Elsevier　B.V.