The　Lake　Tian　E　Zhou　(TEZ,　an　oxbow　lake)　was　formed　during　the　rerouting　of　the　Changjiang　River　in　1972,　with　strong　influences　from　the　main　river　channel　and　flood　events.　Herein,　a　sediment　core　was　collected　from　the　Lake　TEZ　for　the　measurements　of　carbon　isotopes　and　biomarkers,　including　stable　carbon　isotopes　(δ13C),　radiocarbon　composition　(Δ14C),　and　lignin　phenols,　as　well　as　lead-210　to　reconstruct　recent　heavy　flood　events　over　the　past　70　years.　At　the　24–26　cm　interval,　the　sediment　contained　the　highest　OC%,　TN%,　and　lignin　phenols　content,　as　well　as　significantly　depleted　13C　but　enriched　14C,　corresponding　to　the　extreme　flood　event　in　1998.　In　addition,　statistics　from　t-test　showed　that　lignin　phenols　normalized　to　OC　(Λ8),　the　concentration　of　3,　5-dihydroxy　benzoic　acid　(3,　5-BD),　and　the　ratio　of　p-hydroxy　benzophenone　to　total　hydroxyl　phenols　(PHB/HP)　were　all　significantly　different　between　the　layers　containing　flood　deposits　and　the　layers　deposited　under　normal　non-flood　conditions　(p<0.05).　These　results　indicate　that　the　later　three　parameters　are　highly　related　to　flood　events　and　can　be　used　as　compelling　proxies,　along　with　sediment　chronology,　for　hydrological　changes　and　storm/flood　events　in　the　river　basin　and　coastal　marine　environments.　©　2020,　Chinese　Society　for　Oceanography　and　Springer-Verlag　GmbH　Germany,　part　of　Springer　Nature.