Using modelling for flood risk assessments
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When to use hydrological and hydraulic modelling as part of a flood risk assessment for a planning application, and the expected standards.
Adapted edition
- Document type
- Reference Guide
- Format
- DOCX
- Pages
- 9
- Language
- English
- Version
- 1.0
- Updated
- 2026-09-16
- Category
- Safety & operations
- Licence
- Open Government Licence v3.0
Description
When to use hydrological and hydraulic modelling as part of a flood risk assessment for a planning application, and the expected standards. Consult the original guidance for current legal and operational details.
Contents
- When to consider using modelling
- Get modelling advice
- Follow the modelling standards
- Check what information already exists
- Understand limitations of using existing models
- Write a method statement
- Develop the model
- Baseline models
- Boundary conditions
- Hydrology
- Coastal and tidal boundaries
- Climate change allowances
- Post-development models
- Impact on off-site flood risk
- Quality assure the model
- Model performance
Source and licence
Department for Environment, Food & Rural Affairs
AttributionDepartment for Environment, Food & Rural Affairs, ‘Using modelling for flood risk assessments’ (updated 12 December 2023), reused under the Open Government Licence v3.0.
ChangesNeutral text-only adaptation from the official GOV.UK Content API body: headings, paragraphs, ordered and unordered list items and clickable source-link destinations in an appendix preserved. Images, logos, page design, accessible-format request widgets and linked attachments excluded; normalised whitespace, invisible format marks and typography.
Version history
- v1.016/09/2026