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| The waterwijzer overlay provides the loss of earnings of crops based several [[Waterwijzer Overlay#Considerations|input parameters]]. These loss of earnings are currently calculated by the Waterwijzer Landbouw module, which is described [https://waterwijzerlandbouw.wur.nl/ here]. | | The Waterwijzer functionality has been removed in 2025. Please contact Tygron for more information. |
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| ==Usage==
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| The Waterwijzer Overlay results can be used to:
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| * Calculate the loss of earnings based on existing crops for currently known highest and lowest ground water levels.
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| * Calculate the loss of earnings for crops when using different ground water level management strategies simulated by a Ground Water Overlay or a Subsidence Overlay.
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| * Determine the best type of crop per parcel given the highest and lowest ground water levels and type of soil.
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| ==Considerations==
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| The Waterwijzer Overlay calculates loss of earnings for agriculture crops based on:
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| * A climate scenario;
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| * 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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| ==Module==
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| A Waterwijzer Overlay can be configured by opening the Waterwijzer Overlay Wizard. More in-depth information can be found under each of the categories below.
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| {{Template:Waterwijzer_Module_buttons}}
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| ==Result types==
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| The overlay offers the following result types, each storing the agricultural loss of earnings in percentage. The categories are:
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| * Dry: low water levels cause crops to dry out;
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| * Wet: high water levels cause crops' roots to suffocate;
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| * Indirect: Indirect causes, related to combinations of crop, soil, weather and water levels
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| * Salt: salt water irrigation causes damage to crops;
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| * Total: the sum of the previous four categories.
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| <ul>
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| <li style = "display:inline-block">[[File:Waterwijzer_damage_dry.jpeg|200xpx]]</li>
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| <li style = "display:inline-block">[[File:Waterwijzer_damage_wet.jpeg|200xpx]]</li>
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| <li style = "display:inline-block">[[File:Waterwijzer_damage_indirect.jpeg|200xpx]]</li>
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| <li style = "display:inline-block">[[File:Waterwijzer_damage_salt.jpeg|200xpx]]</li>
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| <li style = "display:inline-block">[[File:Waterwijzer_damage_total.jpeg|200xpx]]</li>
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| </ul>
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The Waterwijzer functionality has been removed in 2025. Please contact Tygron for more information.