Original and Imputed Daily Hydrological Time Series for Haditha Dam, Euphrates River, Iraq (1989–2024)

The record contains substantial missing data (14.7–43.9% depending on variable), driven primarily by two conflict-related monitoring interruptions (the 2003–2006 Iraq War and the 2014–2018 ISIS conflict).

Alongside the original (raw) series with missing values retained, this dataset provides a fully imputed version of three variables (water level, upstream level, discharge) produced using an adaptive, gap-aware imputation framework that routes each missing segment to the empirically best-performing method for its duration (linear interpolation, last-observation-carried-forward, a BRITS-style bidirectional GRU, or an MLP with hyperparameter optimisation; multi-year conflict-era gaps use a seasonal-mean fallback).