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Central Asia is well known for its history of water mismanagement. The rapid, catastrophic demise of the Aral Sea is testament to the unsustainable water diversion practices introduced by the Soviet Union in the 1960s and the failure of the five sovereign nations,

This study re-examined hydrochemical data for south-eastern Australian saline lakes using graphical techniques and reaction path models generated by PHRQPITZ. Results showed that the lakes are more diverse than previous studies have implied. Cyclic solute matrices are modified in catchments by rock–water interactions, mineral dissolution, seawater intrusion and cation-exchange reactions, and within the lakes by sulfate reduction, mixing, brine reflux, mineral precipitation and the recycling of the most soluble salts. Three different pathways of the Eugster–Jones–Hardie models are identified. The study is important because the described variations of water chemistry influence the composition of lake biota.

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