Filling the gaps: Calibrating a rainfall-runoff model using satellite-derived surface water extent

Results show that using the raw GFDS data as a proxy for streamflow for calibration improved the skill of the simulated streamflow (in particular the high flows) for 21 of the 30 sites using correlation as a metric. Furthermore, we discuss a calibration strategy using a combination of in situ and satellite data for global hydrological models.