In Australia, Craig (2005) estimated this loss to be about 40% of the total storage volume. This evaporative loss could increase by about 15% by 2080, due to the effect of higher surface temperatures in the face of climate change (Heifer, Lemckert and Zhang, 2012). Increasing total usable water storage by reducing this type of loss depends on the adoption of evaporation suppression technology, which is driven by the marginal value product of the water to be saved. This can be further split into recoverable seepage that infiltrates freshwater aquifers as “return flows”, as well as the non-recoverable seepage infiltrating a saline aquifer.