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.本数据集涵盖密苏里河下游流域（Lower Missouri River Basin）的长期洪水频率与量级分析成果，该流域涉及密苏里州、堪萨斯州、艾奥瓦州及内布拉斯加州的部分区域。数据源自美国地质调查局（U.S. Geological Survey, USGS）国家水信息系统（National Water Information System, NWIS），时间跨度为1960年至2020年。 本数据集包含4个表格文件（支持.csv与.xlsx格式），完整记录了从初始原始记录、经清洗的时间序列直至最终分析成果的全链路数据谱系。依托本数据集开展的研究遵循《公报17C》（Bulletin 17C）指南，采用对数皮尔逊III型分布（Log-Pearson Type III）进行分析，可为气候驱动下洪水重现期与量级变化的水文研究提供支撑。