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Decision making in the coastal zone under an uncertain future

Coastal flooding is rated as the second highest risk of civil emergency in the UK, and can cause damage to coastal and estuarine infrastructure, communities, ecosystems, and even loss of life. Hydrodynamic, numerical modelling tools are used to identify regions susceptible to coastal flooding under current and future climate conditions. Modelling procedures and data inputs can lead to a range of uncertainties that need to be quantified for the simulations to be meaningful. Reported public scepticism of coastal hazard forecasting and flood warning accuracy may be due in some part to the way that flood dynamics and uncertainties in the computer model simulations of flood hazard are communicated to the end-users. The briefing explores key uncertainties in flooding predictions, and how these can be better communicated to the public and stakeholders. Improved communication can help to increase awareness and encourage behaviour change to build trust in warnings and forecasts.