Due to the shared nature of water challenges, companies are to an increasing extent willing to commit large sums to lessening exposure to water risk and to balancing a volume of water equal to what they use, through investments in watersheds and communities outside their own facilities. There is hence a growing demand for a common and unified method that drives investments to address shared water challenges and contribute to public policy priorities.
Volumetric water benefit accounting is a method for practitioners to help calculate the volumetric water benefits of water stewardship activities, and associated guidance related to planning, project selection, and assessment, as well as communicating the benefits of water stewardship activities. Volumetric water benefits (VWBs) are defined as “the volume of water resulting from water stewardship activities, relative to a unit of time, that modify the hydrology in a beneficial way and/or help reduce shared water challenges, improve water stewardship outcomes, and meet the targets of Sustainable Development Goal 6.” (Reig et al., 2019:1).
VWBA provides a standardized approach with a set of indicators to quantify and communicate the volumetric water benefits, and includes complementary indicators to measure nonvolumetric outputs, and elements of effective water stewardship activities that increase the likelihood of generating social, economic, and environmental benefits.
The method includes:
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Recommended indicators and calculation methods for each water stewardship activity
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Communication guidelines
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A three-step process for implementation: 1) identify shared water challenges and understand local context, 2) define water stewardship project activities and partners, and 3) gather data and calculate volumetric water benefits
Before using the methods proposed, companies will need to have a deep understanding of their water use, risk exposure, and catchment conditions, as well as clear and well-defined corporate water stewardship goals and targets (Reig et al., 2019).