Urban　waterlogging　patches　reflect　spatial　patterns　indicative　of　drainage　system　limitations　and　management　challenges,　and　help　pinpoint　potential　waterlogging　impacts　and　spread　risks.　Therefore,　by　constructing　an　urban　waterlogging　model　to　simulate　the　extent　and　depth　of　waterlogging,　the　Number　of　Patches　index　(NP)　is　used　to　reflect　the　number　of　waterlogging　patches,　the　Related　Circumscribing　Circle　index　(Circle)　is　used　to　evaluate　the　potential　impact　range　of　waterlogging,　the　Euclidean　Nearest-Neighbor　Distance　index　(ENN)　is　used　to　assess　the　potential　connectivity　of　waterlogging,　and　the　Interspersion　and　Juxtaposition　Index　(IJI)　is　used　to　assess　the　difficulty　of　retrofitting　vulnerable　points.　Finally,　the　improvement　of　waterlogging　structure　is　achieved　by　utilizing　Vehicle-mounted　Drainage　Pump　(VDPs).　The　research　results　demonstrate　that　as　the　return　period　increases,　the　waterlogging　area　(TA)　and　NP　index　show　an　upward　trend,　while　the　ENN　index　shows　a　downward　trend.　The　Circle　index　initially　decreases　and　then　increases,　reaching　its　lowest　point　at　a　one-year　return　period　(1yr).　The　IJI　index　is　related　to　the　growth　of　TA,　and　in　the　two-year　return　period　(2yr)　and　fifty-year　return　period　(50yr)　design　scenarios,　both　TA　and　IJI　indexshow　significant　growth.　After　the　deployment　of　VDPs,　the　maximum　area　of　waterlogging　elimination　reaches　0.46　km2　at　a　five-year　return　period　(5yr).　The　drainage　system　reaches　its　drainage　limit　at　2yr,　and　the　VDPs　achieves　its　drainage　limit　at　5yr.　The　NP　index　does　not　decrease　significantly,　but　in　the　case　of　a　5yr,　the　high-density　area　decreases　by　1.66　km2.　The　Circle　index　values　decrease　across　the　board,　and　in　the　case　of　a　5yr,　the　potential　impact　range　decreases　by　1.92　km2,　with　134　roads　restored　for　traffic.　The　change　in　the　ENN　index　decreased　from　23.35　to　0.82,　indicating　that　the　spread　of　waterlogging　can　be　more　effectively　controlled　at　lower　return　periods.　The　changes　in　the　IJI　index　are　more　complex,　with　negative　adjustments　between　5　and　20yr,　reducing　the　degree　of　mixing　of　different　levels　of　waterlogging　in　the　remaining　return　periods.　Overall,　with　the　increase　of　rainfall　return　period,　the　waterlogging　area　increases,　the　number　of　patches　increases,　the　shape　becomes　irregular,　the　distance　between　patches　decreases,　and　the　potential　connectivity　increases.　After　the　deployment　of　VDPs,　the　system　integrity　is　improved,　the　waterlogging　impact　range　is　reduced,　the　impact　on　pedestrians　and　facilities　is　mitigated,　and　the　risk　of　pollutant　propagation　and　expansion　of　waterlogging　area　is　reduced.　This　study　contributes　to　reducing　the　potential　risk　of　waterlogging,　improving　urban　drainage　effectiveness,　and　enhancing　the　resilience　and　emergency　response　capability　of　cities.　©　2024　Elsevier　Ltd