Surface evaporation formula (Water Overlay)

Surface evaporation is calculated per cell.

Δw = min( WL_surface , Δt * E_weather * E_overlay )

where:

• Δw = The amount of evaporation which takes place.
• Δt = Computational timestep.

• W_surface = The amount of water (the water column) on the surface.
• E_weather = The evaporation rate of the weather.
• E_overlay = The SURFACE_WATER_EVAPORATION_FACTOR.