Information from the website:

Vflo™ is a much more detailed hydrologic model than other lumped (or partially distributed) models. It produces hydrographs based on conservation equations and the hydraulics of the drainage network. The model capitalizes on investments made in geospatial data such as LiDAR terrain data and other digital maps of impervious area, soils, and land use/cover. The model parameters are derived from the geospatial data and are used for model setup. Input relies on radar rainfall produced from the RainVieux system, which supports modeling of specific storm events at locations where there are no rain gauges. Because it is physics-based, it does not use a unit hydrograph and can be used in areas where previous modeling studies or observed flow are unavailable.

* Extendable to ungauged rivers
* Parameter input using GIS data sets
* Efficient simulation (days in seconds)
* Finite elements based on digital terrain
* Meaningful prediction without calibration
* Radar, rain gauge, satellite or multi sensor rainfall input
* Forecast flooding using detected and forecasted precipitation
* Scalable from upland watershed to river basin using the same drainage network