Flood Risk Assessment

ACCON UK is able to provide detailed Flood Risk Assessments for residential or commercial developments of any scale, nationwide.

The susceptibility of land to flooding is an increasingly important consideration in determining planning applications; the potential consequences for occupiers, either of the development or elsewhere, in terms of safety and financial risk can be serious.

Flood Risk Assessments (FRAs) vary from simple exercises for small/less vulnerable developments to detailed studies for more vulnerable/larger developments sometimes requiring quantitative approaches i.e. hydraulic modelling to determine the risk posed to the development.

Applications relevant to flood risk assessments

Applications likely to require particular consideration of flood risk issues include those for development:

Within a river or coastal flood plain shown on the indicative flood plain map prepared by the Environment Agency;
Within or adjacent to any watercourse, particularly where there might be potential for flash flooding;
Adjacent to or including any flood bank or other flood control structure;
Situated in an area where the Agency have indicated that there may be drainage issues; or
Likely to involve the culverting or diverting of any watercourse.

ACCON’s understanding of the planning process and of relevant legislation (Planning Policy Statement 25: Development and Flood Risk applied in England, and Technical Advice Note 15: Development and Flood Risk used in Wales) allows us to supply reports with the appropriate level of detail for individual developments.

Technical capability

ACCON offer various levels of detail suited to your requirements including:

Scoping Reports;
Full Flood Risk Assessments (FRAs);
Strategies for Sustainable Urban Drainage System (SUDS);
Review of flood risk assessments;
Strategic Flood Risk Assessments; and
Advice on planning applications in terms of flood risk.

Reporting

ACCON are able to provide a variety of detailed reporting for flood risk assessments which depending on the precise requirements of our clients may include:

Pluvial and fluvial flood data.
Predicted flood depth data.
Susceptibility of groundwater identifying where geological conditions could enable groundwater flooding to occur and where groundwater may be in close proximity to the ground surface.
BGS geological indicators of flooding.
Flood return periods.
'Defended' and 'Undefended' flood risk data
Detailed River Network features.
Surface water run-off flood hazard, covering minor rivers, water flowing across the ground or raised groundwater levels.