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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 1==
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| In this scenario we want to simulate a levee breach near an adjacent waterbody. ''In this example, the whole waterbody is present in the 3D project.'' This is important to notice, to model the correct volume of the waterbody. If your waterbody is too large or your project is smaller, you can model the breach area differently, see therefore the use case below.
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| In this scenario you would want to have the breach connected to the water body, since we are going to use the water level of the waterbody to determine the flooding.
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| In the steps here, the breach area is drawn in the Editor. It is also possible to import a [[GeoJSON]] file with the location of the breach.
| | ==Water system model== |
| | * [[How to import a GeoTIFF of waterway depths]] |
| | * [[How_to_add_Subsidence_(Water_Overlay)|Add subsidence calculation results to a water system's input]] |
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| {{Editor steps|title= set-up the breach area
| | ==Flooding== |
| |In the Editor go to GEO Data --> Areas
| | These configurations can be implemented best using the [[Flooding (Overlay)|Flooding Overlay]]. |
| |Add a new area by clicking in the bottom left corner. | | * [[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)]] |
| |Select the newly created area (named Area) and give it a fitting name on the right
| | * [[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)]] |
| |Zoom in to the location where you want to have the breach and click on the Adjust area button | | * [[Flood_wave_use_case_(Water_Overlay)|Create a flood wave across a river]] |
| |Select the location of your breach and click on Apply settings. Make sure the breach is connected to the water body.
| | <!--===Rain=== |
| |Go to the tab attributes and set the breach floor attribute by adding the attribute name, value and clicking on save. | | These configurations can be implemented best using the [[Rainfall (Overlay)|Rainfall Overlay]]. |
| }}
| | * [[Rain_in_project_area_use_case_(Water_Overlay)|Rain falling in the project area]]--> |
| <gallery mode=nolines> | |
| File:Create_area.JPG
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| File:Location_area.JPG
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| File:Draw_area.JPG
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| File:Area_attributes.JPG
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| </gallery>
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| {{Editor steps|title= configure the flooding
| | ==Water shortage== |
| |Add a [[Flooding_(Overlay)|Flooding Overlay]] and go to the [[Water_Overlays#Configuration_Wizard|Configuration Wizard]] of the Flooding Overlay.
| | These configurations can be implemented best using the [[Groundwater (Overlay)|Groundwater Overlay]]. |
| |In step 2.1 select the attribute that specifies your breach floor so the software knows which area is your breach area. | | * [[Drought_excessive_drain_use_case_(Water_Overlay)|Drought from excessive drains in the project area]] |
| |Click on ''Next''.
| | * [[Drought_excessive_evaporation_use_case_(Water_Overlay)|Drought from excessive evaporation in the project area]] |
| |In the dropdown menu choose the name of your breach area and check if the attributes correspond with what you have set as attributes or change them here.
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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 breach area. 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 your scenario.
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| }}
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| <gallery mode=nolines>
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| </gallery>
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| | ==Water quality== |
| | * [[How to trace water through project area (Water Overlay)|How to trace water flow in a hydrological system over time]] |
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| ==Simulate a levee breach scenario 2== | | ==Stationary analyses== |
| In this scenario we want to simulate a levee breach near an adjacent waterbody, ''but in this case, the waterbody is not fully in 3D in the project.'' For example, if your project is of a part of Flevoland and you don't want to model the whole IJsselmeer, you can simulate the flooding by a large waterbody.
| | * [[Calculate_stable_water_level_use_case_(Water_Overlay)|Manually calculate at what level the water level is stable]] |
| In this scenario you would not want to have the breach connected to the water body, since we are not going to import the water level of this water body. This means the water body will not have a water level and thus the flooding will be to the lowest point which is probably to the water body and not to the land.
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| In the steps here, the breach area is drawn in the Editor. It is also possible to import a [[GeoJSON]] file with the location of the breach.
| | {{WaterOverlay usecases nav}} |
| | | [[Category:How-to's]][[Category:Water]] |
| {{Editor steps|title= set-up the breach area | |
| |In the Editor go to 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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| |Zoom in to the location where you want to have the breach and click on the Adjust area button
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| |Select the location of your breach and click on Apply settings. Make sure the breach is not connected to the water body and ideally draw it on the inside of the dike.
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| |Go to the tab attributes and add the [[Flooding_(Overlay)#Define_a_Breach_area|breach floor attribute]] and the [[Flooding_(Overlay)#Define_a_Breach_area|outlet capacity]]. The outlet capacity is the volume of the waterbody. Also add either the [[Flooding_(Overlay)#Define_a_Breach_area|outlet Q]] or the [[Flooding_(Overlay)#Define_a_Breach_area|outlet level]] to determine how much water will flow through the breach.
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| }}
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| <gallery mode=nolines>
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| File:Breach_scenario_2.JPG
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| </gallery>
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| {{Editor steps|title= configure the flooding
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| |Then follow the steps above to configure the flooding.
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| |In step 2.2 when you import the water level areas, don't import water level area for the large water body near your breach area. Also, make sure that the water level areas do not overlap the breach area. 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 your scenario.
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| }} | |
| <gallery mode=nolines>
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| File:Waterbalance_scenario2.JPG
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| </gallery>
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| ==Time-controlled flow rate in a breach area==
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| To create a variable Outlet Q in a breach area, a CSV (comma-separated values) file can be imported.
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| 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.
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| {{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]].
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| |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==
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| It is also possible to simulate a situation in where there is first one levee breach, following by another (or multiple).
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| Therefore we also make use of the variable Outlet Q and a CSV file as mentioned above in the previous use case. In the steps below, two breaches are demonstrated, but the same steps apply to multiple breaches.
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| {{Editor steps|title= set up a multi breach scenario
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| |First create a CSV file in where you structure the data in a way that at the start of the simulation, the outlet is 0. See for an example the image below.
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| |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]].
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| |Add a [[Flooding_(Overlay)|Flooding Overlay]].
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| |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 the breach area that breaks second.
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| |Click on ''Edit'' and import the CSV file.
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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_2_csv.JPG
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| File:Breach_areas.JPG
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| File:Breach_two.JPG
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| </gallery>
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| ==Import waterdepth data==
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| For modelling the correct volume of a waterbody, it is important that the depth of a waterbody is accurately modelled. If you have data of your waterbodies and their depth, for example sections of water bodies, it is possible to import this data as part of the DEM (Digital Elevation Model). Together with importing your water level areas, the volume of the waterbody can then be more accurately calculated. Below the steps on how to import the data.
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| The steps below assume you have already a digital dataset of your waterdepth data available (thus no PDF's with sections).
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| Either a vector dataset of the waterbodies with an attribute that shows the depth or a raster dataset of the waterdepth data.
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| ==Simulate a flood wave with in- and outlet areas==
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| To simulate a scenario of for example a flood wave in a river, you can create in- and outlet areas.
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| 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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| The images show an example with invented values for the attributes.
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| {{Editor steps|title= set up a flood wave scenario
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| |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.
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| |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.
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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, 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:Areas_location.JPG
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| File:Inflow.JPG
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| File:Outflow.JPG
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| File:Waterbalance_panel.JPG
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| </gallery>
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