Introduction: Water is a fundamental component of life on earth. In contrast to the mineral, plant and animal kingdoms, it is and will continue to be, a renewable resource. Rain and snow, although irregular over short time periods and at local and regional levels, are recycled though ... endowment, given in Water Australia- A resource Handbook (1996), have been a feature of natural-resource evaluation for some decades. It has always been the case that knowledge and research on physical characteristics, such as rainfall and river discharge, has been enormous compared to that in terms for wate...

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