How to model drainage (Water Overlay): Difference between revisions
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When using the [[Water Overlay]] to calculate [[groundwater model (Water Overlay)]] situations, the presence of drainages can have a strong impact on the results. Currently, drainages are not an available [[hydraulic structures (Water Overlay)|hydraulic structure]]. Instead, the effects of drainages can be approximated using [[Aquifer (Water Overlay)|Aquifer]]s, configured with a low resistance and set to the height of the drainages. | When using the [[Water Overlay]] to calculate [[groundwater model (Water Overlay)]] situations, the presence of drainages can have a strong impact on the results. Currently, drainages are not an available [[hydraulic structures (Water Overlay)|hydraulic structure]]. Instead, the effects of drainages can be approximated using [[Aquifer (Water Overlay)|Aquifer]]s, configured with a low resistance and set to the height of the drainages. | ||
==Manually adding a drainage== | |||
{{editor location|areas}} | {{editor location|areas}} | ||
Note that these steps assume the [[Overlay Key]]s are set to the default [[Attribute]]s. | Note that these steps assume the [[Overlay Key]]s are set to the default [[Attribute]]s. | ||
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| Add an [[aquifer kd (Water Overlay)|AQUIFER_KD]] [[Attribute]] to the [[Area]] with value 1000. | | Add an [[aquifer kd (Water Overlay)|AQUIFER_KD]] [[Attribute]] to the [[Area]] with value 1000. | ||
| Add an [[aquifer height (Water Overlay)|AQUIFER_HEIGHT]] [[Attribute]] to the [[Area]], with the height of the drainages relative to {{datum}} as value. | | Add an [[aquifer height (Water Overlay)|AQUIFER_HEIGHT]] [[Attribute]] to the [[Area]], with the height of the drainages relative to {{datum}} as value. | ||
}} | |||
==Preparing and importing drainage data== | |||
{{editor location|overlay wizard|your Water Overlay}} | |||
{{howto|title=prepare and load in drainage data | |||
| Ensure your geographic data set has polygons indicating the locations of drainages. | |||
| Ensure that the data has attributes indicating an (excessively) high flow-through value. | |||
| Ensure that the data has attributes indicating at what height relative to {{datum}} the drainages are situated. | |||
| Export the data as GeoJSON. | |||
| Open the [[Water Overlay Wizard]], and continue to the step for aquifers. | |||
| Opt to import new data, and import your drainages file. | |||
}} | }} | ||
Revision as of 10:56, 10 June 2020
When using the Water Overlay to calculate groundwater model (Water Overlay) situations, the presence of drainages can have a strong impact on the results. Currently, drainages are not an available hydraulic structure. Instead, the effects of drainages can be approximated using Aquifers, configured with a low resistance and set to the height of the drainages.
Manually adding a drainage
Note that these steps assume the Overlay Keys are set to the default Attributes.
How to manually create a drainage-approximating aquifer:
Preparing and importing drainage data
Editor → Current Situation (Ribbon tab) → Overlays (Ribbon bar) → your Water Overlay (Left panel) → Configuration Wizard (Right panel)
How to prepare and load in drainage data:
- Ensure your geographic data set has polygons indicating the locations of drainages.
- Ensure that the data has attributes indicating an (excessively) high flow-through value.
- Ensure that the data has attributes indicating at what height relative to datum the drainages are situated.
- Export the data as GeoJSON.
- Open the Water Overlay Wizard, and continue to the step for aquifers.
- Opt to import new data, and import your drainages file.