View source for Waterwijzer Overlay

The waterwijzer overlay provides the yield loss of crops based on several [[Waterwijzer Overlay#Considerations|input parameters]]. The yield loss is currently calculated by the Waterwijzer Landbouw module, which is described [https://waterwijzerlandbouw.wur.nl/ here]. 

==Usage==
The Waterwijzer Overlay results can be used to:
* Calculate the yield loss based on existing crops for currently known highest and lowest groundwater levels.
* Calculate the yield loss for crops when using different groundwater level management strategies simulated by a Groundwater Overlay or a Subsidence Overlay.
* Determine the best type of crop per parcel given the highest and lowest groundwater levels and type of soil.

==Considerations==
The Waterwijzer Overlay calculates yield loss for agriculture crops based on:

* A [[Climate_scenario_(Waterwijzer_Overlay)|climate scenario]];
* A [[Weather_station_(Waterwijzer_Overlay)|weather station]];
* [[Bofek_id_(Waterwijzer_Overlay)|Type of soil]];
* [[Brp_code_(Waterwijzer_Overlay)|Type of crop]];
* [[High_ground_water_prequel_(Waterwijzer_Overlay)|Highest]] and [[Low_ground_water_prequel_(Waterwijzer_Overlay)|lowest]] (averaged) groundwater levels;

Additionally:
* The Overlay makes use specifically of version 2.0.0 of the [https://waterwijzerlandbouw.wur.nl/tool.html Waterwijzer tool].
* 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.

==Result types==
The overlay offers multiple result types. Each result type expresses the yield loss due to specific circumstances as a percentage.
{{result types|suppresscategory=true|allowselflinks=true|
  {{:Damage dry        result type (Waterwijzer Overlay)}}
  {{:Damage wet        result type (Waterwijzer Overlay)}}
  {{:Damage indirect   result type (Waterwijzer Overlay)}}
  {{:Damage salt       result type (Waterwijzer Overlay)}}
  {{:Damage total      result type (Waterwijzer Overlay)}}
}}

<ul>
<li style = "display:inline-block">[[File:Waterwijzer_damage_dry.jpeg|200xpx]]</li>
<li style = "display:inline-block">[[File:Waterwijzer_damage_wet.jpeg|200xpx]]</li>
<li style = "display:inline-block">[[File:Waterwijzer_damage_indirect.jpeg|200xpx]]</li>
<li style = "display:inline-block">[[File:Waterwijzer_damage_salt.jpeg|200xpx]]</li>
<li style = "display:inline-block">[[File:Waterwijzer_damage_total.jpeg|200xpx]]</li>
</ul>

==How-to's==
* [[How to add and remove an Overlay]]
* [[How to edit an overlay legend]]
* [[How to add the Waterwijzer Overlay]]
* [[How to configure the Waterwijzer Overlay to use groundwater results from other calculations]]

==Module==
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. 
{{WaterwijzerOverlay model attribute nav}}
{{Overlay nav}}
[[Category:Overlays with result types]]