Briefing: Wrapt – software for analysing UKCP09 weather generator output

Wrapt (Weather generator rainfall analysis processing tool) is a software tool created as part of a UK Water Industry Research project on the impact of climate change on sewer networks. It allows users to generate design storm change factors and select timeseries from output of the UKCP09 (UK climate projections 2009) weather generator without the need for manual processing or detailed knowledge of weather generators. Wrapt has been developed to assess changes in extremes of short-duration rainfall events – relevant to assessing the performance of sewer networks – but also has potential for applications elsewhere (e.g. water quality modelling).