This section introduces the different sources of flooding which affect all boroughs. The supporting flood maps are provided as a set of five Web Maps. Details on data sources and confidence levels are provided along with the Web Maps.
This section also introduces flood risk from each of these sources. Flood risk is defined as the probability and potential consequences of flooding from various sources. Each sub-section presents information on the flood risk from these sources across the study area and accompanies the Web Map to provide useful flood risk source information.
Developing measures to mitigate against flood risk is essential. However, flood risk can never be fully mitigated against as risks will always remain after actions are taken. In addition, flood risks may have been initially unaccounted for at early design phase, and uncertainties may arise over time. These risks are defined as residual risks and are included within the fluvial and tidal flood risk source sections below.