Risk Mapping

Risk Mapping

A risk map is prepared by combining flood maps with information about the location of values (buildings, roads, etc.) that can be damaged. The mapping shows how great the risk is of flooding in connection with various precipitation events, and is often illustrated by the use of risk maps, which show the expected annual damage (EAD) within a given catchment area (sewer / hydrology).

At LNH water, we have extensive experience with risk mapping, and our analyzes always follow the latest guidelines and recommendations in the area. Our flood maps are prepared by calculations made with a dynamic hydraulic model based on a hydrologically adapted elevation model. Our value mapping is based on the national standard damage values, but will also in many cases be adapted to the local context, where better data may be available.

We collaborate with the Technical University of Denmark (DTU) on the development of better tools for socio-economic analyzes in connection with climate adaptation to floods from cloudbursts and storm surges. DTU's model for Damage Economics for calculating damage in the event of floods across sub-components (eg buildings, companies, transport, health, etc.) is now available from the link below. The model is made as an ArcGIS model and is free when properly credited. The model is available here.

Contact Per Skougaard Kaspersen for more information about what we can offer in relation to risk mapping.