Rural Flood Risk 2D Modelling

I need a detailed two-dimensional hydraulic model to evaluate flood behaviour across a predominantly rural catchment. The model will be used exclusively for flood risk assessment, so accuracy in simulating overland flow paths, storage areas and channel–floodplain interaction is essential.

I will supply topographic data, land-use information and historical flow records; you will assemble, calibrate and run the model in the 2-D module of a recognised engine such as HEC-RAS, TUFLOW, Iber, MIKE 21 or a comparable industry-standard package. Please let me know up front which platform you prefer and why, as I need to be able to review and possibly re-run scenarios later on.

Deliverables
• Geo-referenced flood extent maps for at least the 10-, 50- and 100-year events
• Raster or grid files of maximum flood depth (m) for the same return periods
• Flow velocity layers (m/s) exported in GIS-ready format
• A brief technical note outlining assumptions, calibration statistics and sensitivity checks
• All native model files so the setup can be audited or re-used

Acceptance criteria
The simulated flood extents should align within ±10 % of available high-water marks or past inundation records, and continuity errors must remain below 5 % throughout the domain.

If the scope is clear and you have recent experience delivering rural flood studies, I am ready to move forward immediately.