*3.2. Superposition Experiments*

There are three superposition experiments:

1. The first is for a series of water use e fficiency improvements, using outputs from experiments 7, 8 and 9. The modelling experiment 9 represents a combination of water use e fficiency changes of 230 to 100 mm/year and 100 to 50 mm/year, separated by 5 years. The numerical outputs for experiments 7 and 8, which each represent the individual transitions, but with each starting from an equilibrium state, were superimposed, using Equation (21). This superposition is compared to the semi-analytical and numerical modelling outputs for experiment 9.


The superposition of spatially separate new developments has been previously tested [18]. Water use efficiency measures in separate developments would be expected to be a weaker test of superposition and is not tested further here.
