Urban flood management

Flooding is becoming an increasing threat to many societies world-wide. Rapid urban development combined with the impact of climate change necessitates that more attention is required.

Flooding affects our livelihood and may ultimately also threat our lives. The cost of damaged homes, buildings and production facilities is high and increasing in many places. It is therefore in the interest of society to protect the population and infrastructure against the risks.

Climate changes will affect the precipitation pattern word-wide. Some places will become drier, while others will become wetter with intensified rainfalls. This will increase the pressure to deal with the problems.

Sewer and drainage systems require large investments. Investments and maintenance costs can be reduced by planning and operating the systems more efficiently by incorporating innovative solutions.

Even existing systems can be utilised better by implementing decision support systems, which enable the operators to maximise the utilisation of the capacity more efficiently.

The risk of flooding can be reduced by introducing warning and forecasting systems. The warning system monitors water levels and discharge rates. By combining this information with weather forecasts the risk of saturating the sewers resulting in flooding can be predicted. This information is vital as it enables authorities and operators to evaluate and decide how to deal with the risk and assess the consequences.

Such systems provide the necessary tools to plan and design for the future as the influence of climate change can be taken into account and multiple scenarios considered. 

DHI technology and methods are used worldwide to reduce the risk of flooding and optimise the investments for the future.

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Henrik S. Andersen