Bewdley Flooding Visualisation
Working in conjunction with our Wallingford office, the objective of this flood visualisation pilot study was to model the extent and depth of flooding based on importing modelled flood extent outputs into a 3D model of Bewdley Town Centre.
The flood extent outlines have been modelled using JFLOW-GPU to produce maximum flood depth grids and then a bespoke ArcGIS tool was used to produce the outline shape files. The flood extent outlines are based on a flood depth of 0.05m or greater to remove any areas with a negligible depth and any dry islands (dry areas within the outline) with an area of greater than 750square meters have been removed to increase the reliability of the outline.
The inflows to the flood model were based on an existing 1D ISIS model of the River Severn and have been adjusted to allow for water surfaces already present within the LIDAR data.
This project has also been used as a test case for internal visualisation development funded by JBA’s R&D fund. Work has included:
- » Production of a terrain model from high-resolution LIDAR data.
- » Production of a simplified terrain model with aerial photograph drape
- » Photogrammetric production of a 3D building block model of Bewdley town centre with peaked roofs
- » Production of fully rendered 3D model of Bewdley town centre produced from high-res aerial photography
- » Demonstration video fly-throughs produced and showcased at an internal Environment Agency National Flood Incident Management seminar
- » Extensive work and research on establishing an efficient workflows for importing JFLOW-GPU modelled flood extents with inflows based on existing 1D ISIS model of River Severn into 3D applications for visualisation purposes
For further details please contact David Gooch at our Saltaire office.
