The Monitoring of invasive alien plants in the LIFE RIPARIAS areas in Flanders, Belgium is a sampling event dataset generated by Landmax (https://landmax.be) and published by the Agency for nature and forests (ANB) (Flanders, Belgium). The data are collected in the context of targeted monitoring on watercourses and ponds within the river basins of the Dijle, Zenne and Mark, during the summer of 2022. Only invasive alien species are presented in this dataset. The data are published as a standardized Darwin Core Archive and includes for each sampling event record an event ID, location, date and time (in the event core), supplemented with information about the occurrence of a species and its abundance (in the occurrence extension) and any measurements associated with the occurrence (in the measurements or facts extension).Issues with the dataset can be reported at https://github.com/riparias/anb-plants-occurrences/issues We have released this dataset to the public domain under a Creative Commons Attribution ...