ISBN: 1 84057 591 3
Published Date: 26/05/2011
This study has sought to develop a better means of setting priorities for investment to alleviate the risk of sewer flooding caused by hydraulic overloading. The methodology that has been developed aims to ensure that the risk of sewer flooding to customers is considered in a consistent manner, based on both the probability and consequence of flooding. It includes a 'two strand' approach, which considers acutal flooding incidents in conjunction with information on the potential risk of flooding in order to inform investment decision making. The report makes 15 recommendations for moving to a risk based approach and considers the implications for the regulatory framework. The main report is supported by 2 appendices: (i) a summary of the literature review carried out; and (ii) an assessment of data confidence.