Annual phenology-constrained floodplain wetland maps and hydrometeorological attribution data for Poyang Lake, China (2000–2024)

It includes: (1) annual 30 m wetland maps for 2000–2024 under four criteria — AI30 (>30 growing-season inundated days), RI12.5 (>12.5% of the pixel-specific growing season), RCI14-5/10 (≥14 consecutive inundated days in ≥5 of 10 years), and annual maximum inundation extent (MIE) — derived from daily Landsat–MODIS fused surface reflectance (SDC30) water masks; (2) five-class wetland trend and dynamics rasters (Theil-Sen slope, Mann-Kendall statistics) with elevation-band statistics; (3) annual MIE and RI12.5 area time series and trend statistics; (4) five-class dynamic composition of 102 seasonal-isolated lakes; (5) annual hydrological indicators (derived from daily Xingzi water levels) and meteorological indicators (aggregated from ERA5), with Spearman correlation, all-subset regression, and PCA results for driver attribution; and (6) basin-level data for the global floodplain screening based on GLWD v2 and JRC Global Surface Water.

All rasters are in EPSG:32650 (UTM 50N) at 30 m resolution; the hydrologic year runs from 1 April to 31 March. No raw third-party observations are redistributed.