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| This page describes several use cases and examples of configurations in the [[Flooding_(Overlay)|Flooding Overlay]]. | | This page describes how to realize specific use cases by using the [[Water Module|water module]]. |
| ==Simulate a levee breach scenario==
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| In the steps below, the breach area is drawn in the Editor. It is also possible to import a [[GeoJSON]] file with the location of the breach.
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| {{Editor steps|title= simulate a levee breach.
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| |Add your breach area by going in the Editor --> GEO Data --> Areas
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| |Add a new area by clicking in the bottom left corner.
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| |Select the newly created area (named Area) and give it a fitting name on the right
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| |Go to the tab attributes and set the breach floor attribute. This can be determined by clicking in the 3D- world on several places near where you want to have the breach and seeing the ground height there.
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| }}
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| <gallery mode=nolines>
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| </gallery>
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| ==Time-controlled flow rate in a Breach area== | | ==Water system model== |
| To create a variable Outlet Q in a breach area, a CSV (comma-separated values) file can be imported.
| | * [[How to import a GeoTIFF of waterway depths]] |
| Below the steps on how to create such a breach area. For this example we create the CSV in Excel, but you can also use another program to create the CSV.
| | * [[How_to_add_Subsidence_(Water_Overlay)|Add subsidence calculation results to a water system's input]] |
| {{Editor steps|title= set-up your CSV in Excel
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| |Open Excel.
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| |In the first column, define your time steps. This can be in seconds, minutes, hours or days.
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| |Add the corresponding flow rates per step in the second column.
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| |Save the Excel as a CSV.
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| }}
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| <gallery mode=nolines>
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| File:Csv_example.JPG
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| File:Save.JPG
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| </gallery>
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| {{Editor steps|title= import the CSV as the flow rate
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| |Either add a breach area or have your [[GeoJSON]] file with your breach area ready. The area should have at least a [[Flooding_(Overlay)#Define_a_Breach_area|breach floor attribute]].
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| |Add a [[Flooding_(Overlay)|Flooding Overlay]]. | |
| |Go to the [[Water_Overlays#Configuration_Wizard|Configuration Wizard]] of the Flooding Overlay.
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| |In step 2.1 either select the attribute that specifies your breach floor or import your [[GeoJSON]] file.
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| |Click on ''Next''.
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| |In the dropdown menu, select your breach area. Now click on ''Edit''.
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| |Import your CSV file by selecting the CSV file.
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| |Select the time units in your file.
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| |Select the seperator for your file.
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| |Click on Apply.
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| }}
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| <gallery mode=nolines>
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| File:Select_breach.JPG
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| File:Edit_breach.JPG
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| File:Import_csv.JPG
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| File:Time_units.JPG
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| File:Seperator.JPG
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| File:Apply_file.JPG
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| </gallery>
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| ==Multi breach simulation== | | ==Flooding== |
| It is also possible to simulate a situation in where there is first one levee breach, following by another (or multiple).
| | These configurations can be implemented best using the [[Flooding (Overlay)|Flooding Overlay]]. |
| Therefore we also make use of the variable Outlet Q as mentioned above in the previous use case. In the steps below, two breaches are demonstrated, but the same steps apply to multiple breaches.
| | * [[Visualize levee breach from water body inside project area use case (Water Overlay)|Visualize levee breach from water body inside project area (river, small lake)]] |
| {{Editor steps|title= set up a multi breach scenario
| | * [[Visualize levee breach from water body outside project area use case (Water Overlay)|Visualize levee breach with water from outside the project area (large lake, sea)]] |
| |Either add two breach areas or have your [[GeoJSON]] file with your breach areas ready. The areas should have at least a [[Flooding_(Overlay)#Define_a_Breach_area|breach floor attribute]].
| | * [[Flood_wave_use_case_(Water_Overlay)|Create a flood wave across a river]] |
| |Add a [[Flooding_(Overlay)|Flooding Overlay]].
| | <!--===Rain=== |
| |Go to the [[Water_Overlays#Configuration_Wizard|Configuration Wizard]] of the Flooding Overlay.
| | These configurations can be implemented best using the [[Rainfall (Overlay)|Rainfall Overlay]]. |
| |In step 2.1 either select the attribute that specifies your breach floor or import your [[GeoJSON]] file.
| | * [[Rain_in_project_area_use_case_(Water_Overlay)|Rain falling in the project area]]--> |
| |Click on ''Next''. | |
| |In the dropdown menu, select the breach area that breaks second.
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| |Click on ''Edit'' and import the CSV file. Structure the data in the CSV in a way that at the start of the simulation, the outlet is 0.
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| |Finish the Wizard and refresh the Overlay.
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| }}
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| <gallery mode=nolines>
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| File:Breach_areas.JPG
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| File:Breach_two.JPG
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| File:Breach_2_csv.JPG
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| </gallery>
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| ==Import waterdepth data== | | ==Water shortage== |
| | These configurations can be implemented best using the [[Groundwater (Overlay)|Groundwater Overlay]]. |
| | * [[Drought_excessive_drain_use_case_(Water_Overlay)|Drought from excessive drains in the project area]] |
| | * [[Drought_excessive_evaporation_use_case_(Water_Overlay)|Drought from excessive evaporation in the project area]] |
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| ==Create in- and outlet areas== | | ==Water quality== |
| To simulate a scenario of for example a flood wave in a river, you can create in- and outlet areas.
| | * [[How to trace water through project area (Water Overlay)|How to trace water flow in a hydrological system over time]] |
| These are basically breach areas. The inlet area demonstrates the inflow of water, the outlet area demonstrates the outflow of water.
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| {{Editor steps|title= set up a flood wave scenario
| | ==Stationary analyses== |
| |Draw two areas at the one side of the river where water will flow in and at the other side of the river where the water flows out. It is also possible to import a [[GeoJSON]] file with these areas.
| | * [[Calculate_stable_water_level_use_case_(Water_Overlay)|Manually calculate at what level the water level is stable]] |
| |The areas should have a [[Flooding_(Overlay)#Define_a_Breach_area|breach floor attribute]]. Give the inlet area an [[Flooding_(Overlay)#Define_a_Breach_area|outlet level]] and/or [[Flooding_(Overlay)#Define_a_Breach_area|outlet Q]]. This depends on the data you have of the scenario. If you know for example the water level of a flood wave, use the outlet level. If you know the flow rate, use the outlet Q. Both is also possible, then the outlet level has precedence over the outlet Q. For the outlet area, enter, a negative outlet Q value and/or an outlet level.
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| |Add a [[Flooding_(Overlay)|Flooding Overlay]] and go to the [[Water_Overlays#Configuration_Wizard|Configuration Wizard]] of the Flooding Overlay.
| | {{WaterOverlay usecases nav}} |
| |In step 2.1 either select the attribute that specifies your breach floor or import your [[GeoJSON]] file.
| | [[Category:How-to's]][[Category:Water]] |
| |Click on ''Next''.
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| |In the dropdown menu, check if the attributes of the areas correspond with what you have set as attributes.
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| |In step 2.2 import your water level areas with at least a water level attribute. Make sure the water level areas do not overlap the in- and outlet areas. If they do, minimalise the wizard and remove the part of the areas in the Areas menu or solve it in a GIS and import the water levels again.
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| |Finish the Wizard and refresh the Overlay.
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| |After the flooding is calculated, check the Water Balance to get more insight in the scenario.
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| }}
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| <gallery mode=nolines>
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| File:Waterbalance.JPG
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| </gallery>
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