Falen keringen template

Het falen van keringen is een van de toepassingen van het Tygron Platform. Hiervoor is een template project genaamd Falen keringen template gemaakt. Om dit template effectief in te kunnen zetten is deze handleiding gemaakt. Daarin wordt de te volgen werkwijze beschreven en worden aandachtspunten beschreven.

Required data

• AHN100x100.geojson
• Peilgebieden.geojson
• Duikers_WVS_041219.geojson
• Peilen hoofdsysteem Noord 121219.geojson

Experience with using the Tygron Platform and using the Water overlay wizard and Geo data wizard is required.

Steps

Below the steps for using the template project on a new project area and to calculate and export the results for further analysis.

Apply template on new project area

In this step we will apply the template Falen keringen project on a new project area.

Falen keringen template:

1. Log in to the Tygron Platform; the LTS
2. Read the headlines to know if there are any failures, for example at the data provider level which could have effect on creating new projects without certain datasets.
3. Click on New Project
4. Give the new project a name and click on Use Falen keringen template
5. Zoom in the next step to the area where you want to create a 3D model from. If required, adjust the size of the square/ rectangle with the sliders to adjust the size of the to be created project. The part of the map in the square/rectangle will become the 3D model.
6. Click on the Advanced settings and uncheck IMWA. If AHN3 data is available as open data for this project area, check the Use latest AHN3 option.
7. Click on the Generate map button.
8. The new project will now be created from the various open data sources.

Import water level areas

The water level areas contain water levels for various scenario's and will be used to determine the water level of the water body which will flow into the breach.

Falen keringen template:

1. Open the Geo data wizard
2. Click on next and choose for Areas
3. In the next step choose to Import a GeoJSON file and select the file Peilen hoofdsysteem Noord 121219.geojson
4. In step 2, set the slider on 20m to create polygons from the point data.
5. Choose the attribute .... for the name of the water level areas in step 5.
6. Finish the wizard
7. In the Current tab, click on the button Overlays
8. Select the overlay Peilen hoofdsysteem from the left panel and and click on Add areas with attribute in the bottom right corner.
9. In the panel that pops up, choose the attribute .... and click on Add.

Define breach location

Falen keringen template:

1. Add a new Area to the project. This will be the breach area.
2. Draw the breach area in the 3D world, in the location where the water from the breach should emerge (see tips below in gallery).
3. Add an Attribute to the created Area, with the breach height attribute name and a height value.

• 

  It is best to draw the breach area not too close to the water body. Also, the breach area does not have to cover the whole levee, but only the slope of the levee on the side of the area that is going to inundate.

Choose as attribute name for the breach height: Breslocatie_1.

Configure flooding overlay

Breach

Falen keringen template:

1. In the right panel, click on Configuration wizard to start the wizard
2. In step 1, specify the time for the simulation calculation period.
3. In step 2.1 select your breach area from the dropdown menu and fill in:
4. Vaste hoogte en breedte (laat stroomsnelheid leeg)
5. Use external area.
6. External surface level lager dan breshoogte.
7. Gebruik gemeten waterpeilen en/of de eerder ingeladen peilen van Peilen hoofdsysteem Noord 121219.geojson voor de bepaling van het waterlevel.
8. Vuistregel voor het oppervlak: 10 x het debiet dat door de bres stroomt (te checken via show water balance). Dit komt overeen met een peildaling van 10 cm. Beter te groot dan te klein (worstcase). Ordegrootte: 10.000.000 m2.
9. Is de verwachte waterdaling in het hoofdsysteem bekend, hou daar in het te hanteren oppervlak dan rekening mee.

Culverts

Falen keringen template:

1. Choose from step 2.3 to 2.6.1 the option Do nothing and proceed with next.
2. In the step 2.6.4 Culverts, if there are already culverts present: click on Erase all and start again and in the panel that pops up click on Erase all culverts. Then select Import culverts and click on Import culverts.
3. In the Geo data wizard select the file Duikers_WVS_041219.geojson

Finish wizard

Falen keringen template:

1. Choose from step 2.6.3 to 2.6.5 the option Do nothing
2. In step 3 and 4 proceed with next.
3. In step 5 make sure the Surface elevation, Surface max speed, Surface max value and Base types are checked.
4. Choose an amount of timeframes by taking into account the calculation time (which is entered in step 1), so that for example, you arrive at timesteps per hour or day.

Export results

In this last step, the results will be exported as raster data.

Falen keringen template:

1. When the overlay is calculated, play the overlay to see the results and check for yourself if they are realistic. If not, open the configuration wizard and adjust settings. Make sure you recalcuate the overlay again by clicking on Update now.
2. Click on Export Grid File and check if the name is correct, choose for GeoTIFF as format and check the All frames box. The Surface max value overlay is now exported.
3. Click on export and create a new folder to save all the files
4. Repeat the steps for exporting the Surface max speed overlay, but don't check the All frames box but select the last timeframe.

The final GeoTIFFs need to be opened in a GIS program and saved as a map with proper legend and title in jpg format. These maps needs to be created from the exported data:

• Maximale stroomsnelheid: Surface max speed map at the last timeframe
• Maximale waterdiepte per locatie: Surface max value map at the last timeframe
• Waterdiepte in de tijd/tijd-tot-inundatie: multiple Surface max value maps at different timeframes. Create for example a map for every one or two hours (depending on the simulation time).