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| This page describes several use cases and examples of configurations in different [[Water Overlay|water overlays]] based on the [[Water Module|water module]]. | | This page describes how to realize specific use cases by using the [[Water Module|water module]]. |
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| ==Basics== | | ==Water system model== |
| [[Stationary_water_model_use_case_(Water_Overlay)|Create a stationary water system]]
| | * [[How to import a GeoTIFF of waterway depths]] |
| | | * [[How_to_add_Subsidence_(Water_Overlay)|Add subsidence calculation results to a water system's input]] |
| ==Excessive water==
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| ===Flooding===
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| * [[Levee_breach_water_body_inside_project_area_use_case_(Water_Overlay)|Levee breach with all water inside the project area (river, small lake)]] | |
| * [[Levee_breach_water_body_outside_project_area_use_case_(Water_Overlay)|Levee breach with water from outside the project area (large lake, sea)]] | |
| * [[Multiple_sequential_breaches_use_case_(Water_Overlay)|Multiple sequential breaches]]
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| | ==Flooding== |
| | These configurations can be implemented best using the [[Flooding (Overlay)|Flooding Overlay]]. |
| | * [[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)]] |
| | * [[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)]] |
| * [[Flood_wave_use_case_(Water_Overlay)|Create a flood wave across a river]] | | * [[Flood_wave_use_case_(Water_Overlay)|Create a flood wave across a river]] |
| | | <!--===Rain=== |
| | | These configurations can be implemented best using the [[Rainfall (Overlay)|Rainfall Overlay]]. |
| ===Rain=== | | * [[Rain_in_project_area_use_case_(Water_Overlay)|Rain falling in the project area]]--> |
| * [[Rain_in_project_area_use_case_(Water_Overlay)|Rain falling in the project area]] | |
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| ==Water shortage== | | ==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_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]] | | * [[Drought_excessive_evaporation_use_case_(Water_Overlay)|Drought from excessive evaporation in the project area]] |
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| ==Water quality== | | ==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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| ==Stationary analyses== | | ==Stationary analyses== |
| * [[Trace_water_through_project_area_use_case_(Water_Overlay)|Track flow in a hydrological system over time]]
| | * [[Calculate_stable_water_level_use_case_(Water_Overlay)|Manually calculate at what level the water level is stable]] |
| * [[Calculate_stable_water_level_use_case_(Water_Overlay)|Calculate at what level the water level is stable]] | |
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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_Overlay#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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| ==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 the depth of the soil, 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 (no PDF's with sections).
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| Either a vector dataset of the waterbodies with an attribute value for the depth or a raster dataset is sufficient to use. In this example we use a vector (shapefile) polygon dataset and make use of a GIS (QGIS) to transform the vector data to a raster dataset to import in the {{software}}.
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| {{Editor steps|title= create the raster dataset
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| |Open the vector dataset in a GIS.
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| |Now we want to create the raster by making use of the rasterize menu. This menu can be found in the tab Raster > conversion > rasterize (vector to raster)
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| |Define in the panel the shapefile, the attribute containing the depth values, the name and location of the output raster and either the raster size or resolution. In this case we recommend to set the resolution. Choose the same resolution as chosen for the [[Terrain_height#Terrain_height_in_the_Tygron_Platform|DEM when generating the project]].
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| |When these settings have been set, click on the pencil icon to edit the text. It is important to also add a nodata value to create a partial raster. On the places where there is a nodata value, the {{software}} will use the values from the default DEM. Add the following statement to the text box to create the nodata value: ''-a_nodata <number to replace with nodata>'', for example: ''-a_nodata 0'' (see also the image below). This means that where there is a value of 0 in the vector dataset, it is replaced with a nodata value in the raster dataset.
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| |Click on OK and wait till the raster data is created. Now you can close the GIS program.
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| }}
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| <gallery mode=nolines>
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| File:Data.JPG
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| File:Rasterize.JPG
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| File:Raster_settings.JPG
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| </gallery>
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| The next step is to import the created raster to replace the DEM only on the locations of waterbodies with the new raster values.
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| {{Editor steps|title= import the raster to replace the DEM partially | | {{WaterOverlay usecases nav}} |
| |(See for more explanation and images on the following steps [[Terrain_height#Import_your_own_DTM|this Wiki page]]). Go to the tab Terrain > Select Elevation Geotiff
| | [[Category:How-to's]][[Category:Water]] |
| |Click on import new Geotiffs in the bottom right corner and choose the created raster. Depending on the file size and the internet speed, it make take some time to upload the file to the server.
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| |When the file is uploaded, select it and click on Apply
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| |Refresh the Heightmap overlay and click on the location of a waterbody to check the new height.
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| }}
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