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date: 16 September 2019

Abstract and Keywords

The environmental challenges within drylands to providing sustainable water, food, and energy for an increased population test the capacity of integrated science to represent, apply, and project our knowledge to future forecasts. Scientists in this discipline need to provide (i) quantitative understanding of natural resources (land and water), their characteristics, and their interactions within the soil-water-plant-atmosphere continuum; (ii) the valuation of primary resources and their use for food production; and (iii) knowledge for the building of a translational framework between the scientific and the policymaking communities to advise policymakers how to better manage these resources. The use/reuse of two potential water resources can play pivotal roles in improving water and food security in drylands; once potential challenges and gaps in physical water accounting and characterization are addressed, new water and green water can be a part of future water and food policymaking and bridge the ever increasing water–food demands in drylands.

Keywords: blue water, green water, nonconventional water, drylands, water security, food security

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