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| ===Considerations===
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| The Waterwijzer Overlay communicates with the [https://waterwijzerlandbouw.wur.nl/query-wdb.php?f=JSON Waterwijzer API] to calculate the loss of earnings for agriculture crops based on the following parameters: | | The Waterwijzer module calculates the result for the following question: |
| * A climate scenario;
| | ''I want to know the expected agricultural yield loss based on the crop, soil type and local groundwater levels, given a climate scenario and the expected weather.'' |
| * A weather station;
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| * Type of soil;
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| * Type of crop;
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| * Highest and lowest (averaged) ground water levels;
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| * The irrigation parameter, which in the [https://waterwijzerlandbouw.wur.nl/tool.html Waterwijzer tool] is active for a number of the crop types, is currently not taken into account.
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| ==Concept==
| | In order to answer this question using the {{software}} a connection (using API) was realized with Wageningen University's [https://waterwijzerlandbouw.wur.nl/ Waterwijzer Landbouw module]. |
| Preparation steps:
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| #Generate a project for an area in the Netherlands using the {{software}}.
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| #*The Dutch BRP geo-plugin retrieves the known agriculture plots. Each agriculture plot has an identification number for the type of plot, which is stored in the [[BRP_CODE]] attribute.
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| #*The Dutch BRO geo-plugin retrieves the known soil types, stored as underground terrain. The simplified [[BOFEK_ID]] is configured by default for each terrain type of these terrain.
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| #Add a [[Waterwijzer Overlay]]
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| #The climate scenario and weather station are configured using the Waterwijzer Overlay Wizard
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| #The ground water levels can also be configured using the Waterwijzer Overlay Wizard. These ground water levels can be provided as:
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| #* A [[GeoTiff|geotiff]] containing ground water depths;
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| #* A result type of the [[Subsidence Overlay]]; See [[Hi_ground_water_result_type_(Subsidence_Overlay)|high]] and [[Low_ground_water_result_type_(Subsidence_Overlay)|low ground water depths]].
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| #* A result type of the [[Groundwater_(Overlay)|Groundwater Overlay]]; See [[Ground_last_value_result_type_(Water_Overlay)|last ground water depth]] and [[Ground_max_value_result_type_(Water_Overlay)|max depth]]
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| The Waterwijzer Overlay is a [grid overlay]. The project area is rasterized into grid cells, each containing a value for:
| | {{article end |
| * the crop: BRP_CODE
| | |seealso= |
| * the soil: BOFEK_ID
| | * [[Waterwijzer Overlay]] |
| * the lowest (average) ground water depth: distance to surface, from geotiff or result overlay.
| | |videos= |
| * the highest (average) ground water depth: distance of surface, from geotiff or result overlay.
| | <gallery widths=300px> |
| The climate scenario and weather station are a single value for each grid cell.
| | File:YoutubeLogo1.jpg|Koppeling met Waterwijzer Landbouw van de Wageningen Universiteit in Tygron (Dutch only)|link=https://youtu.be/S6159aWGDyM |
| Each unique combination of crop, soil, ground water depths, climate scenario and weather station leads to four loss of earning values, one for each category.
| | File:YoutubeLogo1.jpg|Uitleg van de Waterwijzer Landbouw 2.0, versie september 2020 (Dutch only)|link=https://youtu.be/FXMM3ib-ggw |
| These categories are:
| | </gallery> |
| * Dry: A low water level (high ground water depth) can limit the amount of water absorbed by plant roots.
| | }} |
| * Wet/Oxygen: A high water level (low ground water depth) can lead to suffocation of the plant roots.
| | {{Template:Waterwijzer Module buttons}} |
| * Indirect: Indirect causes due to soil type in combination with crop, water levels, climate scenario and weather station's weather patterns.
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| * Salt: The damage occurring due to irrigation with salt water.
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| These four categories are also summed up to a total number, resulting in a [[Total loss of earnings result type (Waterwijzer Overlay)|fifth result type]].
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