Groundwater Prequel (Water Overlay): Difference between revisions
Jump to navigation
Jump to search
m (Frank@tygron.nl moved page Groundwater GeoTiff (Water Overlay) to Groundwater GeoTIFF (Water Overlay)) |
No edit summary |
||
| Line 1: | Line 1: | ||
Groundwater levels in the Water model can be initialized using a [[ | Groundwater levels in the Water model can be initialized using a [[GeoTIFF]]. | ||
Groundwater is only used when the [[ground water (Water Overlay)|GROUND WATER attribute]] of the [[Water Overlay]] is set to '''complete''', meaning the [[underground model (Water Overlay)|underground model]] is vertically and horizontally fully active. | Groundwater is only used when the [[ground water (Water Overlay)|GROUND WATER attribute]] of the [[Water Overlay]] is set to '''complete''', meaning the [[underground model (Water Overlay)|underground model]] is vertically and horizontally fully active. | ||
| Line 5: | Line 5: | ||
Values in the groundwater GeoTIFF can represent either: | Values in the groundwater GeoTIFF can represent either: | ||
* the datum height of the ground water level. | * the datum height of the ground water level. | ||
* the water depth, as the initial distance between the surface and the [[Ground_watertable_result_type_(Water_Overlay)|watertable]]. A greater value in the | * the water depth, as the initial distance between the surface and the [[Ground_watertable_result_type_(Water_Overlay)|watertable]]. A greater value in the GeoTIFF will result in a lower watertable. | ||
When a groundwater | When a groundwater GeoTIFF is not configured for the Water Overlay, the watertable is initialized using the [[water level (Water Overlay)|WATER_LEVEL]] attribute of the [[Water area (Water Overlay)|water area]] instead. For locations without water areas, the water table is set to one meter below the [[elevation model (Water Overlay)|surface]]. | ||
{{GeoTiffSpec | {{GeoTiffSpec | ||
| Line 28: | Line 28: | ||
}} | }} | ||
==Default data== | ==Default data== | ||
For the Netherlands, a number of groundwater | For the Netherlands, a number of groundwater GeoTIFFs are provided by default, based on data provided by The Netherlands Hydrological Instrumentarium: | ||
* NL_GHG_kk-nhi (Average highest waterdepth) | * NL_GHG_kk-nhi (Average highest waterdepth) | ||
* NL_GLG_kk-nhi (Average lowest waterdepth) | * NL_GLG_kk-nhi (Average lowest waterdepth) | ||
* NL_GVG_kk-nhi (Average spring waterdepth) | * NL_GVG_kk-nhi (Average spring waterdepth) | ||
It is important to emphasize that when using these | It is important to emphasize that when using these GeoTIFFs, they should be configured as water ''depth'' (relative to terrain) rather than water height (relative to datum). | ||
{{article end | {{article end | ||
|howtos= | |howtos= | ||
* [[How to use a default groundwater | * [[How to use a default groundwater GeoTIFF (Water Overlay)]] | ||
* [[How to upload and use a groundwater | * [[How to upload and use a groundwater GeoTIFF (Water Overlay)]] | ||
|seealso= | |seealso= | ||
* [[Water area (Water Overlay)]] | * [[Water area (Water Overlay)]] | ||
Revision as of 12:11, 17 January 2022
Groundwater levels in the Water model can be initialized using a GeoTIFF.
Groundwater is only used when the GROUND WATER attribute of the Water Overlay is set to complete, meaning the underground model is vertically and horizontally fully active.
Values in the groundwater GeoTIFF can represent either:
- the datum height of the ground water level.
- the water depth, as the initial distance between the surface and the watertable. A greater value in the GeoTIFF will result in a lower watertable.
When a groundwater GeoTIFF is not configured for the Water Overlay, the watertable is initialized using the WATER_LEVEL attribute of the water area instead. For locations without water areas, the water table is set to one meter below the surface.
| Groundwater depth GeoTIFF specification | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Description | The depth of the ground water level, relative to the surface. | ||||||||
| Value | Groundwater level (m below terrain height) | ||||||||
| Groundwater datum GeoTIFF specification | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Description | The datum height of the ground water level. | ||||||||
| Value | Groundwater level (m + datum) | ||||||||
| Groundwater unsaturated zone GeoTIFF specification | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Description | The fraction of saturation of the unsaturated zone. | ||||||||
| Value | Saturation (fraction) | ||||||||
Default data
For the Netherlands, a number of groundwater GeoTIFFs are provided by default, based on data provided by The Netherlands Hydrological Instrumentarium:
- NL_GHG_kk-nhi (Average highest waterdepth)
- NL_GLG_kk-nhi (Average lowest waterdepth)
- NL_GVG_kk-nhi (Average spring waterdepth)
It is important to emphasize that when using these GeoTIFFs, they should be configured as water depth (relative to terrain) rather than water height (relative to datum).
How-to's
- How to use a default groundwater GeoTIFF (Water Overlay)
- How to upload and use a groundwater GeoTIFF (Water Overlay)
See also
- Group
- Weather
- Bottom distance • Bottom pressure • Bottom resistance • Ground conductivity • Groundwater datum • Groundwater depth • Manning • Max infiltration • Microrelief • Surface level • Surface u • Surface v • Terrain elevation • Unsaturated fraction
- Elevation
- Elevation
- Related