Groundwater Prequel (Water Overlay): Difference between revisions

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Groundwater in the Tygron Platform is modeled in the form of a [[GeoTiff]].
Groundwater in the Tygron Platform is modeled in the form of a [[GeoTiff]].


Groundwater is only used when the [[ground water (Water Overlay)|GROUND WATER attribute]] of the [[Water Overlay]] is true, meaning the [[underground model (Water Overlay)|underground model]] is 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 fully active.


The groundwater GeoTIFF will dictate the initial distance between the surface and the watertable. A greater value in the GeoTiff will mean a lower watertable. If there is no groundwater GeoTiff present, the water table is dictated by the [[water level (Water Overlay)|WATER_LEVEL]] attribute of the [[Water level area (Water Overlay)|water level area]] instead. If no water level area exists there either, the underground is assumed to be fully saturated, with the groundwater level equal to the surface height relative to {{datum}}.
The groundwater GeoTIFF will dictate the initial distance between the surface and the watertable. A greater value in the GeoTiff will mean a lower watertable. If there is no groundwater GeoTiff present, the water table is dictated by the [[water level (Water Overlay)|WATER_LEVEL]] attribute of the [[Water level area (Water Overlay)|water level area]] instead. If no water level area exists there either, the underground is assumed to be fully saturated, with the groundwater level equal to the surface height relative to {{datum}}.

Revision as of 12:01, 10 July 2020

Groundwater in the Tygron Platform is modeled in the form of a GeoTiff.

Groundwater is only used when the GROUND WATER attribute of the Water Overlay is set to COMPLETE, meaning the underground model is fully active.

The groundwater GeoTIFF will dictate the initial distance between the surface and the watertable. A greater value in the GeoTiff will mean a lower watertable. If there is no groundwater GeoTiff present, the water table is dictated by the WATER_LEVEL attribute of the water level area instead. If no water level area exists there either, the underground is assumed to be fully saturated, with the groundwater level equal to the surface height relative to datum.

For the Netherlands, a number of groundwater GeoTiffs are offered by default, based on data provided by The Netherlands Hydrological Instrument:

  • 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 height of the ground water level across the project area.
Value Groundwater level (m below terrain height)

How-to's

See also

Water Module
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Water Module
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Tutorials
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Overview
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Theory
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Benchmarks
Group
Weather
Rain m • Evaporation m
Prequels
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
Building attributes • Hydrological features • Hydraulic structures •  Terrain attributes • Model attributes • Results


Benchmarks button.png
Introduction button.png
Water Module
Benchmarks button.png
Getting started button.png
Tutorials
Benchmarks button.png
Overview button.png
Overview
Benchmarks button.png
Theory button.png
Theory
Benchmarks button.png
Benchmarks button.png
Benchmarks
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