 The study investigates the use of remote sensing for monitoring soil moisture and its impact on hydrological models. The advanced seaterometer, ASCED, sensor on board the Metop satellite was used to derive the Soil Wetness Index, SWI. The SWI was compared with modeled data from a continuous rainfall runoff model, MISDC, and assimilated into the model using a simple technique. Three synthetic experiments were conducted to investigate the potential of the SWI under uncertain conditions. Results showed that the SWI can improve runoff prediction in the study area, particularly when initial soil wetness conditions are unknown. This article was authored by El Braca, F Maloney, T Mora-Marco, and others. We are article.tv, links in the description below.