Prequels (Water Overlay)

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Prequel overlays can be linked to the Water Overlay to initiate particular parts of the model with more accuracy and detail. They can even be used to link result types of one Water Overlay as prequel input to another.

Name Prequel Underlying data Unit Range No data Description
Terrain elevation TERRAIN_ELEVATION Water Prequel m datum -10000 to 10000 Clamped to range Used for initializing the terrain elevation on this datum.
Surface level SURFACE_LEVEL Water Prequel m -10000 to 10000 Clamped to range Used for initializing the surface water level on this datum, both in waterways and on land.
Groundwater depth GROUND_WATER_DEPTH Water Prequel m 0 10000 Clamped to range Used for initializing the ground water level to these depths.
Groundwater datum GROUND_WATER_DATUM Water Prequel m datum -10000 10000 Clamped to range Used for initializing the ground water level on this datum.
Unsaturated fraction UNSATURATED_FRACTION Water Prequel 0 to 1 Clamped to range Used for initializing the saturation of the unsaturated zone in the underground.
Bottom Resistance BOTTOM_RESISTANCE Water Prequel days 0 to 1000000 Clamped to range A grid of values containing the resistance of the lower layer against the bottom boundary flow.
Bottom Pressure BOTTOM_PRESSURE Water Prequel m datum -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.
Max infiltration MAX_INFILTRATION Water Prequel m 0 to 1000000 Clamped to range Used in Infiltration only mode to limit the maximum amount of storage per gridcell.
Manning MANNING Water Prequel 0.01 to 0.255 Clamped to range Used for overriding the surface terrain's manning value.


Water Module
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Water Module
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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
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