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In the Real Time Flood Risk Assessment viewer risk information is presented for the actual situation (using measurements) and upcoming day’s using forecasts, uses a single point of truth of information for all the daily operational working processes.

In the Real Time Flood viewer information is presented for the actual situation (using measurements) and upcoming day’s using forecasts. Information is clustered into:

  • Water levels: Measured and forecasted water levels at different locations, and the translation of these water levels to the hydraulic load (including wind and waves) to a levee or dam at a certain location.
  • Levees: A levee can be divided in different sections based on common characteristics. For each levee section the characteristics are described that determine the strength of the levee.
  • Zones: the conditional risk in an area is quantified using flood scenarios and the probability of failure. An area can be divided in different zones for example based on zip code. The conditional risk is quantified in a conditional risk of economic damage, conditional risk of people at risk and conditional fatalities and local probability of exposure to a flood. In Figure 4 we show an example of the conditional risk per zip code.
  • Measures: For each levee or dam also a library of different fragility curves, which describe the effectiveness of measures, can be prepared in advance. For example the height of the levee can be corrected, as the states of the grass revetment etc.
  • Human (expert judgment): The probability of failure, as the consequences of flooding, can be corrected for biases by human assessments. Therefore measurements can be used, field inspections as well as remote sensing and data science techniques.

All available information has been gathered in a Real Time Flood Risk Assessment viewer, to be used to determine the chances of dike failure and connected risks (impact). For purposes of learning, validation and asset management also synthetic ‘what if’ events (water levels) can be defined. These synthetic events can describe potential or historic flood events.

The Real Time Flood Risk Assessment viewer is useful to facilitate the discussion on possible measures. It helps the experts to explicit their opinion and it provides insight in a complex system with interdependencies. Knowledge could be available in their heads and in this way, while presenting and discussing the options with the help of the map, it is also visible for the other experts in the expert team how this knowledge could benefit in the situation.

Flood Risk Expert judgment Budapest (Hungary)

All available information about the region of Györ (Danube, upstream from Budapest) has been gathered in a Real Time viewer, to be used to determine the chances of dike failure and connected risks (impact). After a short introduction of the participants the aim of meeting is explained: to realize a method to estimate the effects of measures through expert judgment. The goal of this method is flood reduction. As input for the expert judgment session, the damage, casualties and victims per neighbourhood are demonstrated on a map. The purpose of the procedure is then to estimate the (often reducing) effect of these measures. This allows us to assess all kinds of organizational measures based on their (cost) effectiveness.

Related CM functions

Levee information region Györ

Crisis Management Improvements Waterboard Rijn and IJssel (NL)

As a result of the new standardization (different requirement and new calculation rules) in the Netherlands, the flood defenses of the Rijn and IJssel Water Board (WRIJ) no longer meet the standard for water safety. Before 2050, the flood defenses must meet the new standard. Apart from the switch to the new standards and new legislation, as a flood defense manager, WRIJ is primarily responsible for preventing a flood. This is done by taking care of the flood defense through management, maintenance and in the fight against calamities.

WRIJ is working on a flood and attack plan. The water board sets out its action perspective in order to fulfill its duty of care in the field of relief at high outside water levels as effectively as possible.

In the has been investigated:
1. Whether the capacity of the water board is sufficient to bring the water level up to the standard.
2. How the water board can improve its action perspective in the event of high water threats.

Related CM functions

Levee information region Lobith
Indicator failure probability

Levee safety assessment Waterboard Hollands Noorderkwartier (NL)

The ambition of Water board Hollands Noorderkwartier (HHNK) is to develop knowledge with the Real Time Flood viewer, with which the implementation of -based management and maintenance can be taken a step further. Develop knowledge and apply pragmatically to use the safety for programming risk-controlled mowing management.

Work has been done on a method for prioritizing management and maintenance from the risks for water safety. This involves targeted inspection and maintenance at those locations where the risks to water safety within the management area are greatest and / or the maintenance task requires this from other functions (eg image, road management). The methodology also focuses on preparing annual plans given an available budget and optimizing management and maintenance.

Related CM functions

Levee information region North-Holland
Levee safety levels

Dike strength: Functional and technical design (NL)

The water board investigated which information per role in the
organization in what way should be available. This has been approached
from both the technical and the organizational side. The result was
visualizing current and expected water levels, displaying
the current and expected flood probabilities with the effect of
measures up to the visualization of current and expected risks.

Related CM functions

Overview dike strength
Illustrations
Real Time Flood Risk Assessement Viewer - levees
Real Time Flood Risk Assessement Viewer - risk assessment
Real Time Flood Risk Assessement Viewer - set up
Real Time Flood Risk Assessment Viewer - fragility curves
Real Time Flood Risk Assessment Viewer - scenarios
Real Time Flood Risk Assessment Viewer - indicator for drought
Real Time Flood Risk Assessment Viewer - real time water levels
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© DRIVER+

DRIVER+ project has received funding from the European Union's 7th Framework Programme for Research,
Technological Development and Demonstration under Grant Agreement (GA) N° #607798