The Digital Twin Earth (DTE) Hydrology Next is the prototype of a full advanced end-to-end demonstrator of DTE over Europe and targeted regions in Africa and central America at high resolution in space and time (targeting 1 km and 1 hour) by extending the successful implementation of previous models over the Po River Valley in northern Italy and over the Mediterranean region, respectively. Specifically, it implements the reconstruction of the hydrological cycle at high resolution in space and time by an effective combination of state-of-the-art Earth Observation (EO) data, in situ observations, advanced hydrological and hydraulic modelling, AI and advanced digital platform capabilities.