Low ground water prequel (Subsidence Overlay)

Name	Prequel	Underlying data	Unit	Range	No data	Description
Low ground water	LOW_GROUND_WATER_LEVEL	Subsidence Prequel	m			The depth of the ground water level, relative to the surface

The initial low groundwater level in the Subsidence Module at the start of the simulation can be initialized using a prequel Grid Overlay. In the Subsidence Overlay Wizard it is possible to select one of the Default datasets provided, to import and create a GeoTIFF Overlay or to do nothing and proceed with the next step.

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)

These GeoTIFFs can be linked to the Subsidence Overlay using a GeoTIFF Overlay and referencing it with this prequel.

Notes

• Specified as m below terrain height
• When no prequel is specified, the water levels of groundwater level areas are used to initialize groundwater levels.

See also

• Ground water level area (Subsidence Overlay)

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Subsidence Module

Subsidence Overlay

Tutorials

Overview

Theory

Benchmarks

Group

Subsidence rasters

Model

Overview • Calculation • Theory

Prequels

High ground water prequel • Low ground water prequel • Clay thickness prequel

Related

Features • Model attributes •  Subsidence Model • Result type