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Data Welcome


Flood Hazard Data With Global Coverage

 

 

 

 

 

 

 

 

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Data Welcome


Flood Hazard Data With Global Coverage

 

 

 

 

 

 

 

 

 

We have built flood models that cover the entire world. Our SSBN-Global and SSBN-US layers cover both riverine and flash-flood perils and are provided both with and without flood defences. And all river channels, from large rivers to small streams are explicitly represented. Our methods are fully peer reviewed and published in world leading journals and we are continually validating our models against real world events.

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SSBN-US


 

 

SSBN-US

 

 

 

 

 

 

 

 

 

 

 

 

SSBN-US


 

 

SSBN-US

 

 

 

 

 

 

 

 

 

 

 

 

- US Flood Hazard data at ~30m resolution
- Fluvial and pluvial (flash-flood) perils
- All river channels explicitly represented
- US Army National Levee Dataset included
- Peer reviewed in world leading journals

 

 

 

 SSBN-US was built using the US Government National Elevation Dataset, and has a 1-arc second (~30m) resolution. All simulations are dynamic full 2D simulations, undertaken using our bespoke 2D hydraulic modelling package. Our core computational engine is based on methods pioneered by the leading research-grade LISFLOOD-FP hydraulic model developed at the University of Bristol. SSBN-US is driven using thousands of USGS river gauges and rainfall data from NOAA. SSBN-US data also includes the US Army National Levee Dataset. This nationwide database of flood defences, is explicitly included within the model.

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SSBN-Global


SSBN-Global

 

 

 

 

 

SSBN-Global


SSBN-Global

 

 

 

 

 

- Global Flood Hazard data at ~90m resolution
- Expert hazard layers at 10 Return Periods
- Fluvial and pluvial (flash-flood) perils
- All river channels explicitly represented
- Data provided with and without defences
- Categorised hazard data easily accessible

SSBN-Global flood hazard data have a 3-arc second resolution (~90m), providing both fluvial (riverine) and pluvial (localised rainfall) hazards. Our global hazard layers are based upon custom processed topography data, taken from the Shuttle Radar Topography Mission (SRTM). We explicitly simulate in-channel flow for all channels, regardless of size. Our model structure moves away from ‘traditional’ rainfall-driven cascades and instead uses output from the SSBN Global Discharge Model (GDM). This approach incorporates thousands of river gauging stations across the world. All our methods, including hazard layer validation, have been published in world leading journals, and can be found here.

We have worked with leading international scientists to develop a global terrain model with the highest possible vertical precision

The development of a high-quality terrain model is one of the critical challenges associated with building a global flood model.  For flood modelling, the single most important property of a terrain model is its vertical precision; this is more important than a headline horizontal resolution because it is the changes in elevation that dictate where water flows in the model.  We have worked with leading scientists around the world to develop a terrain model that has been corrected as far as possible for the major sources of vertical error such as vegetation, built structures, spacecraft oscillation and instrument noise.

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Accumulation


SSBN-Accumulation Zones

 

 

 

 

 

Accumulation


SSBN-Accumulation Zones

 

 

 

 

 

- Hazard Accumulation zones available globally

- Hydrological accumulation zones combined with satellite rainfall products to identify correlated catchments

- Can be used to identify over exposure in a given region

- Identify plausible event footprints