Hydrological Dataset on Flood Magnitude and Recurrence Analysis across Kansas, Iowa, Nebraska, and Missouri (1960–2020)

This dataset contains the results of a long-term flood frequency and magnitude analysis for the Lower Missouri River Basin, which includes portions of Missouri, Kansas, Iowa, and Nebraska. The data were obtained from the U.S. Geological Survey (USGS) National Water Information System (NWIS) and span the years 1960–2020. The dataset includes four tabular files (available in .csv and .xlsx formats) documenting the full data lineage—from initial raw records to cleaned time series and final analytical outputs. The study supports hydrologic research on climate-driven changes in flood recurrence and magnitude using the Log-Pearson Type III distribution as per Bulletin 17C guidelines.