Water Overlay ground model cheatsheet: Difference between revisions
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Revision as of 09:28, 14 March 2025
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Core principles
In the 2-dimensional grid model of the Tygron Platform, water infiltrates from the surface, infiltrates through the unsaturated zone and is partially stored, after which it reaches the saturated zone. Here, horizontal flow occurs, depending on hydraulic gradients and permeability, and everything is simulated in a time-dependant context. There is no vertical (and no radial) flow in the saturated zone.
Unsaturated zone Terrain Type: Attributes
| Parameter | Unit | Description |
|---|---|---|
| UNSATURATED_FRACTION | fraction | Initial value saturation E.g. 0.5 means pores are 50% filled with water. |
| WATER_STORAGE_PERCENTAGE | m³/m³ | Effective porosity. Determines water storage capacity. |
| GROUND_INFILTRATION_MD | m/day | Maximum infiltration speed in this type of terrain. |
Saturated zone Terrain Type: Attributes
| Parameter | Unit | Description |
|---|---|---|
| HYDRAULIC_CONDUCTIVITY | m/day | Horizontal conductivity. |
| HYDRAULIC_CONDUCTIVITY_WITH_THICKNESS_MD | m²/day | Horizontal conductivity corrected for layer thickness. |
Simulation modes Water Overlay Wizard
| Mode | Description |
|---|---|
| None | No groundwater processes are simulated. Surface is impermeable. |
| Infiltration only | Only infiltration into the unsaturated zone is simulated. Storage is defined by MAX_INFILTRATION_M. |
| Complete | Complete simulation of infiltration, flow, and evaporation. |
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