Water Balance Components
The water balance components can be grouped into components corresponding to zones in a vertical cross-section in the soil forming reservoirs with inflow, outflow and storage of water:
- the surface reservoir (S)
- the root zone or unsaturated (vadose zone) (R) with mainly vertical flows
- the aquifer (Q) with mainly horizontal flows
- a transition zone (T) in which vertical and horizontal flows are converted
The general water balance reads:
- inflow = outflow + change of storage
and it is applicable to each of the reservoirs or a combination thereof.
In the following balances it is assumed that the water table is inside the transition zone.
Read more about this topic: Hydrology (agriculture)
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