Bottom pressure prequel (Water Overlay)

Name	Prequel	Underlying data	Unit	Range	No data	Description
Bottom Pressure	BOTTOM_PRESSURE	Water Prequel		-1000000 to 1000000	Clamped to range	A grid of values containing the head of the ground water pressure caused by ground water in higher regions outside the project area.

Notes

• The unit is: Groundwater head of higher regions. (m + datum)
• The values in this prequel grid are clamped between -1000000.0 and 1000000. No data values are therefore not allowed.
• This prequel can also have multiple input frames. In this case the values will be updated linear throughout the simulation period. For example 5 input frames over a 10 day simulation period result in a new value every two days.
• Note: Input frames are not linked to the overlay's output timeframes.

See also

• Underground seepage formula (Water Overlay)
• Ground bottom pressure m (Water Overlay)
• Ground bottom flow result type (Water Overlay)
• Underground model (Water Overlay)

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Water Module

Water Module

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Overview

Theory

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Group

Simulation data

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