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Name Role About
Anne Leskens Solution owner, Contact

owner and main contact.

3Di - Nelen & Schuurmans Solution team, Contact

3di team

3Di is a cloud-based versatile water manage­ment instrument that enables flood forecas­ting and risk mapping.

3Di models are fast, accurate and visual. 3Di results present flooding locations, water depths, arrival times and damages in high detail. Moreover, flood mitigation measures can be modelled for their effectiveness. Experts and decision-makers can interact with the model to simulate dike breaches, rain events and storm surges.

The fact that users can create different scenario's in combination with mitigation measures makes it the go-to instrument for hydrology experts, crisis managers and policy makers working for water authorities and cities around the world.   

Life flood modeling during crisis situation

Flood area (Zegrzynski lake), which is flooded after a dam breach.

The hydrodynamic model 3Di supports decision-making in crisis management situations. The 3Di instrument is accurate, fast and visible. With these abilities 3Di provides flood simulations that can instantly help to get a better Common Operational Picture and raise situational awareness among all stakeholders (including non-experts). Furthermore, 3Di provides the possibility to alter the model instantly to calculate other possible scenarios. For instance to see and measure the effects of possible measures.

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UC-01 Compute water flow

The 3Di engine entails the code to compute water flow in 1D and 2D for flooding, drainage and other water management studies. The engine makes use of a so-called subgrid method. This technique includes high resolution information in coarse resolution computations. This guarantees both accuracy and efficiency.

The 3Di engine includes a whole range of processes, including surface run-off, 1D and 2D surface water and groundwater flow. Moreover, it can deal with 1D sewer flow and structures like pumps, weirs and culverts. 3Di deals with numerous external forcings, like precipitation from radar images and wind.

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UC-02 Interact with the simulation

The 3Di Livesite is the user interface to run a 3Di model and allows users to interact with the model during a simulations. Livesite users are able to interactively influence the simulation by changing the rainfall, wind force and model components like cross-sections, breaches and pump capacities.

Through the livesite, connections are available with computing servers. The computing server delivers the computation power that is needed to run the model. This connection makes it possible to use 3Di models from every place with an internet connection. The only recommended software to be installed before using the 3Di livesite is the Google Chrome Browser.

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UC-03 Export model results for offline analysis

The 3Di Livesite provides the option to export (store) results of a model run.

The results of a model run are stored in a NetCDF-file. The NetCDF is written according to the CF conventions. Through the 3Di – API it is possible to download the NetCDF-file. For the GIS software QGIS a 3Di plugin is developed to read and use the NetCDF file.

The results of a 3Di model run can be easily visualized using the information platform Lizard and its API. Within this route the NetCDF with raw data is made available in the user interface of Lizard.net portal.

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Illustrations
3Di enables accurate flood modelling
3Di Water Management
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Video illustrations