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Metrics

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The Food-Energy-Water Nexus

Abstract

To mitigate the consequences of FEW interdependences and to guide policy action, decision-makers and stakeholders can benefit from using clearly developed indicators and performance metrics. This chapter presents a high-level framework to categorize FEW metrics; demonstrate how different metrics might be favored over others, and explain how metrics and models are used to inform and direct actions. Decision-making and planning are not only about numbers but also honest, clear language to communicate the science and data correctly. Metrics are useful to measure what we value and facilitate effective stakeholder communication, engagement, and decision-making around FEW activities, regulations, and targets. Metrics attempt to capture what society values and society is itself molded by the ongoing effort to bestowing the measured quantities with greater value. Well-defined metrics are crucial for the ability of stakeholders and decision-makers to sift through competing arguments for and against different FEW nexus policies. However, different stakeholders might emphasize one set of metrics over another to focus attention on what they deem most important.

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Notes

  1. 1.

    See EPA 40 CFR Parts 122 and 125 (http://www.gpo.gov/fdsys/pkg/FR-2014-08-15/pdf/2014-12164.pdf): “First, the intake flow of the cooling water intake structure is restricted, at a minimum, to a level commensurate with that which could be attained by use of a closed cycle, recirculating cooling system. Second, the design through-screen intake velocity is restricted to 0.5 fps (foot per second). Third, the total quantity of intake is restricted to a proportion of the mean annual flow of a freshwater river or stream, or to a level necessary to maintain the natural thermal stratification or turnover patterns (where present) of a lake or reservoir except in cases where the disruption is beneficial, or to a percentage of the tidal excursions of a tidal river or estuary.”

  2. 2.

    Water withdrawal refers to water that is removed from the local environment for human purposes without consideration of whether that water is returned to the local environment in liquid form.

  3. 3.

    Water consumption refers to the difference between water withdrawal from the local environment and the quantity of water that is returned to the local environment in liquid form. Generally, water consumption is due to evaporation and evapotranspiration or its embodiment in some product (e.g., food).

  4. 4.

    A full description is beyond the scope of this paper. The summary here is from the latest WMP, and the differences from WMP active during the drought of 2011 are not material for this discussion.

References

Further Reading

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  • Foley, J. A., DeFries, R., Asner, G. P., et al. (2005). Global consequences of land use. Science, 309(5734), 570–574.

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  • Hoekstra, A. Y., & Chapagain, A. K. (2007). Water footprints of nations: Water use by people as a function of their consumption pattern. Water Resources Management, 21(1), 35–48.

    Article  Google Scholar 

  • Hoekstra, A. Y., Chapagain, A. K., Aldaya, M. M., & Mekonnen, M. M. (2011). The water footprint assessment manual: Setting the global standard. Enschede, The Netherlands: Water Footprint Network.

    Google Scholar 

  • King, C. W., & Webber, M. E. (2008). Water intensity of transportation. Environmental Science & Technology, 42(21), 7866. https://doi.org/10.1021/es800367m.

    Article  CAS  Google Scholar 

  • Kounina, A., et al. (2013). Review of methods addressing freshwater use in life cycle inventory and impact assessment. The International Journal of Life Cycle Assessment, 18(3), 707–721.

    Article  CAS  Google Scholar 

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Correspondence to Carey W. King .

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Carbajales-Dale, M., King, C.W. (2020). Metrics. In: Saundry, P., Ruddell, B. (eds) The Food-Energy-Water Nexus. AESS Interdisciplinary Environmental Studies and Sciences Series. Springer, Cham. https://doi.org/10.1007/978-3-030-29914-9_13

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