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What Does a Flood Risk Assessment Include?

In accordance with the National Planning Policy Framework (NPPF), a site-specific Flood Risk Assessment (FRA) should be both proportionate to the degree of flood risk, and appropriate to the scale, nature and location of the proposed development. For this reason we offer flood risk advice ranging from outline position statements, to formal Flood Risk Assessment reports, which are all specifically tailored to your project needs.

What level of Flood Risk Assessment is right for you?

For smaller sites within Flood Zone 1, a Flood Risk Assessment Statement may be all that is required to accompany a development proposal.

However, for larger sites within Flood Zone 1, or those located within a Critical Drainage Area, or area identified by the Local Planning Authority (LPA) as having a drainage problem, a formal Level 1: Flood Risk Assessment (FRA) Screening Study is required. The Level 1 FRA is an interpretative desk study that provides the LPA with the assurance they may need that flood risk has been duly assessed.

For larger sites within Flood Zone 1 (greater than one hectare), or sites classified at greater flood risk within Flood Zones 2 and 3, we provide a Level 2 Flood Risk Assessment (FRA): Scoping Study. This more in-depth assessment expands the content of the Level 1 assessment to include a site reconnaissance and a quantitative assessment of predicted flood levels across the site using Environment Agency (EA) Flood Level Data for relevant watercourses. The interpretive report discusses Finished Floor Levels, Flood Mitigation Measures, and where appropriate includes a Foul and Surface Water Drainage Strategy.

All our FRA reports provide an interpretative assessment of flood risk and include the following:

  • Reference to the Local Authority Strategic Flood Risk Assessment (SFRA) and Surface Water Management Plan (SWMP), together with specific reference to relevant Local Plan policies.
  • Reference to Environment Agency Flood Risk Classification, the EA Risk of Flooding from Rivers and the Sea (RoFRaS) database, and EA Standing Advice.
  • Assessment of flood risk from all sources (Fluvial, Surface Water and Groundwater),
  • Detail of Historic Flooding.
  • A definition of Flood Risk and probability.
  • Flood Hazard Rating and Climate Change.
  • Flood Risk Mitigation Measures and (where appropriate) Foul and Surface Water Drainage Strategies.

Where applicable, our Flood Risk Assessments are co-ordinated with other service areas to enhance the depth and quality of the overall assessment.

agb Environmental has experience of working on a wide variety of Flood Risk Assessments across the south and east of England. For further information or to discuss your project, contact Alex Brearley at agb Environmental on or call 01638 663226.

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