A rational GIS based approach to preliminary flood component analysis

There are benefits in carrying out an assessment to identify the potential causes of flooding prior to embarking on detailed diagnostic studies. The results of the assessment will help to identify: • The different sources of flood risk associated with a particular problem • The stakeholders who should be involved • Appropriate modelling techniques • Data collection needs • Resource requirements • Costs and their likely distribution among stakeholders. The proposed approach may be used as part of the investigation of specific flood incidents or as a general approach to the assessment of flood risk in potential development sites or of high vulnerability infrastructure and buildings.