The　water　levels　of　lakes　along　the　eastern　route　of　the　South-to-North　Water　Diversion　Project　(ER-SNWDP)　are　expected　to　rise　significantly　and　subsequently　affect　the　processes　of　flood　control　and　drainage　in　corresponding　lake　basins.　However,　few　studies　have　focused　on　the　impacts　of　inter-basin　water　diversion　on　the　flood　control　and　drainage　of　water-receiving　areas　at　the　lake　basin　scale.　Using　MIKE　software,　this　paper　builds　a　coupled　hydrodynamic　model　to　address　the　existing　literature　gap　regarding　the　impacts　of　inter-basin　water　diversion　on　the　processes　of　flood　control　and　drainage　in　a　water-receiving　lake　basin,　and　it　considers　the　many　types　of　hydraulic　structures　in　the　model.　First,　a　flood　simulation　model　was　constructed　to　simulate　the　complex　movement　of　water　transferred　by　the　ER-SNWDP,　by　waterlogging　in　the　lakeside　area　around　Nansi　Lake　(NL),　and　water　in　NL　and　its　tributaries.　The　ER-SNWDP　was　also　considered　in　the　model.　Second,　the　model　was　calibrated　and　verified　with　measurement　data,　and　the　results　showed　that　the　model　was　efficient　and　presented　a　Nash-Sutcliffe　efficiency　coefficient　(NSE)　between　0.65　and　0.99.　Third,　the　processes　of　flooding　and　draining　in　the　lakeside　area　of　NL　were　simulated　under　different　water　diversion　and　precipitation　values.　Finally,　the　impacts　of　the　emergency　operations　of　the　ER-SNWDP　on　flood　control　and　waterlogging　drainage　in　the　lakeside　area　of　NL　were　analysed　based　on　the　results　from　the　proposed　model,　and　some　implications　are　presented　for　the　integrated　management　of　inter-basin　water　diversion　and　affected　lakes.