High ground water prequel (Subsidence Overlay)

Name	Prequel	Description
High ground water level prequel	HIGH_GROUND_WATER_LEVEL	The depth of the ground water level, relative to the surface

The initial high 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

• Groundwater level areas

---

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