4.5 Alternatives
65
Finally, there are those who only use water quantity to calculate the performance
of a system in the form of (water quantity/ total water quantity), which obviously is
wrong. Section 6.2 gives an example with more explanation.
4.5.2 Water Productivity
WaP is defined as in Eq. (4.17) (Haie N., Sefficiency (Sustainable efficiency) of
Water-Energy-Food Entangled Systems 2016):
W a P =
pr oduction
water quantit y
(4.17)
WaP does not give a percentage because production is different from water quantity, which mostly shows itself in the unit of the numerator being different from the
denominator, e.g. e/mm. Some authors designate WaP as ‘water use efficiency’, and
Fig. 4.17 Contour lines of R1-WC1-cSE trade-offs and patterns along four WR1 values
65
Finally, there are those who only use water quantity to calculate the performance
of a system in the form of (water quantity/ total water quantity), which obviously is
wrong. Section 6.2 gives an example with more explanation.
4.5.2 Water Productivity
WaP is defined as in Eq. (4.17) (Haie N., Sefficiency (Sustainable efficiency) of
Water-Energy-Food Entangled Systems 2016):
W a P =
pr oduction
water quantit y
(4.17)
WaP does not give a percentage because production is different from water quantity, which mostly shows itself in the unit of the numerator being different from the
denominator, e.g. e/mm. Some authors designate WaP as ‘water use efficiency’, and
Fig. 4.17 Contour lines of R1-WC1-cSE trade-offs and patterns along four WR1 values