Daily Water Levels of the Vistula River at Warsaw, 1799–2024: A Complete and Homogenized Long-Term Record

The dataset Vistula River Warsaw Daily Water Levels provides a continuous daily record of water stages of the Vistula River at Warsaw, comprising 82,453 observations from 1 February 1799 to 31 October 2024. Data are stored in a two-dimensional tabular format with one row per day and variables provided in columns. The table contains the following fields: date – calendar date in the format YYYY-MM-DD. water_level_cm – daily water stage in centimetres relative to the reference gauge zero, homogenized and referred to the currently operating gauge Warsaw–Boulevards. water_level_m_Kronstadt60 – water level converted to metres above sea level according to the Kronstadt 60 vertical reference system (m a.s.l.). water_level_m_EVRF2007 – water level converted to metres above sea level according to the EVRF2007 vertical reference system (m a.s.l.). data_type – classification of the record as observed (measured values) or reconstructed (gap-filled values). reconstruction_method – method applied in the case of reconstructed data, e.g. linear interpolation or gauge relationship. remarks – additional information, notes on reconstructions quality. The dataset has been harmonized from heterogeneous historical sources and adjusted for gauge relocations, unit conversions, and reference level changes, providing a consistent long-term series suitable for hydrological and environmental research.