1 Executive Summary Developing our knowledge of flooding and how we can effectively assess potential impacts on our communities is essential in implementing effective and sustainable flood risk management plans. Flooding is a complex natural process arising from a range of sources (e.g. rivers, sea, surface water/pluvial) and from a range of mechanisms. Using information on the characteristics of floods we are able to assess the potential impact of floods using computer simulations.
Computer flood models are key tools in assessing, testing and informing the delivery of flood risk management actions; while there will remain inherent uncertainty in representing natural systems, quality models enable the production of flood maps and data that support communication with the public and enable key policy and investment decisions. Utilising a consistent framework to guide model development will support a common understanding and effective communication of flood study needs within and between organisations. Ensuring a clear description of model needs enables models to be developed appropriately to deliver study objectives.
Thus, with an improved knowledge base, common language and improved communication, model quality can be raised to improve confidence in information that empowers decision-makers to act in support of flood risk management. This modelling guidance document is therefore intended to provide a common technical basis to support Responsible Authorities in the planning, development and use of flood models to inform flood risk management decisions. As flood modelling science is constantly evolving, this guidance will be revised as our understanding improves.
SEPA’s strategic flood risk team ( strategic.floodrisk@sepa.org.uk) welcome any questions, comments or suggestions for improvement regarding this guidance. Flood Modelling Guidance for Responsible Authorities v1.1 1