Before diving into the example, let’s briefly explain how the Water Balance works in VO Continuous modelling.
In Continuous OTTHYMO, three major water balance processes are modelled, as shown in the figure below. Precipitation first falls on the surface. If a snowpack exists, the precipitation is added to it for snowpack water balance simulation. Excess rainfall and snowmelt then enter the depression storage, where it can be lost through evapotranspiration (ET) and infiltration. The remaining portion moves to the active soil zone. From there, water may be lost to ET and groundwater infiltration (GWI); any remaining volume either stays in the soil profile or becomes surface runoff.
If we consider this system diagrammatically:

  • Input: Precipitation
  • Outputs: ET, GWI, and Runoff