Urban flood nowcasting system

The system provides real-time nowcasts (= short term forecasts) of extreme precipitation and urban flooding. It consists of four components: a real-time nowcasting system for extreme precipitation based on high-resolution radar data from compact X-band radar (Furuno, Model:WR-2100 ), a hybrid data- and model-system system for urban inundation modelling, a risk assessment module, and a warning system. The nowcasting system is applicable to any city or urban area.
Technology demonstrated in relevant environment.
Representative model or prototype system, which is well beyond that of TRL 5, is tested in a relevant environment. Represents a major step up in a technology’s demonstrated readiness. Examples include testing a prototype in a high-fidelity laboratory environment or in a simulated operational environment.
A prototype system has been tested for the city of Ghent, Belgium.

How does it work?

The urban flood nowcasting system makes use of 4 innovative components. (1) A system for extreme precipitation short-term forecasting applying X-band radar technology (FURUNO city radar). (2) A fast and computationally efficient urban flood modelling and mapping system, based on hybrid data-/model-based approach. A detailed 1D-2D nested model for the urban drainage system and the surface runoff and inundation system is complemented by a surrogate conceptual framework for fast and efficient computation. (3) Urban flood risk assessment applying functions describing the socio-economic consequences, specifically valid for urban areas. (4) A warning system, taking uncertainties in the extreme rainfall and urban inundation nowcasts into account.

October, 2017