A Risk Based Approach to Flooding

Reference: 11/WM/17/2
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.

Price: £19  

UKWIR/FRMRC IUD Demonstration Projects

Reference: 10/WM/17/1
ISBN: 1 84057 552 2
Published Date: 01/03/2010

New models developed by the Flood Risk Management Research Consortium were applied in selected drainage areas. The modelling contractors provided feedback that enabled the researchers to enhance their models. The experiences gained confirmed that 1D and 2D surface modelling techniques are complementary rather than competing. Although marginally more resource demanding at data preparation stage, the 1D approach is significantly less demanding than 2D modelling when it comes to file sizes and simulation time and enables rapid representation of options when developing responses to flooding problems. However, 2D surface modelling provides more effective graphical representation of flood pathways and receptors when carrying out a flood risk assessment. A conceptual model for integrated urban drainage modelling is presented.

Price: £15