ABSTRACT
To complete our study of the water cycle, it is essential to understand water storage and its variations. Remember that the water balance equation for a given time period can be written as:
(7.1)
where E is evaporation [mm] or [m3], I is the incoming volume [mm] or [m3], O is the
outgoing volume [mm] or [m3] and 'S is the variation in storage [mm] or [m3].
