Rain model (Water Overlay)

Rain is implemented in the water model.

Rain can be implicitly activated and deactivated by defining an appropriate period of rainfall as weather effect. If a period with no rainfall is defined, that period is simulated but no rain is simulated.

Currently, during a period in the simulation where rainfall is defined, water is uniformly added to the surface of all cells in the project area. During any single defined period of rain, the amount of rain is consistent over time. At the end of the defined period of rain, exactly the defined amount of rain will have fallen on each cell.