Groundwater Prequel (Water Overlay): Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 2: | Line 2: | ||
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. | ||
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 [[Ground_watertable_result_type_(Water_Overlay)|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 (Water Overlay)|WATER_LEVEL]] attribute of the [[Water level area (Water Overlay)|water level area]] instead. For locations without water level areas, the water table is set to one meter below the [[elevation model (Water Overlay)|surface]]. | |||
==Default data== | |||
For the Netherlands, a number of groundwater GeoTiffs are provided by default, based on data provided by The Netherlands Hydrological Instrumentarium: | 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 watertable) | * NL_GHG_kk-nhi (Average highest watertable) | ||
| Line 14: | Line 20: | ||
|value=Groundwater level | |value=Groundwater level | ||
|unit=m below terrain height | |unit=m below terrain height | ||
}} | |||
{{GeoTiffSpec | |||
|title=Groundwater | |||
|description=The datum height of the ground water level. | |||
|value=Groundwater level | |||
|unit={{mdatum}} | |||
}} | }} | ||
Revision as of 10:35, 16 February 2021
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 level area instead. For locations without water level areas, the water table is set to one meter below the surface.
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 watertable)
- NL_GLG_kk-nhi (Average lowest watertable)
- NL_GVG_kk-nhi (Average spring watertable)
| Groundwater GeoTIFF specification | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Description | The depth of the ground water level, relative to the surface. | ||||||||
| Value | Groundwater level (m below terrain height) | ||||||||
| Groundwater GeoTIFF specification | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Description | The datum height of the ground water level. | ||||||||
| Value | Groundwater level (m + datum) | ||||||||
How-to's
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