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Review of methods addressing freshwater use in life cycle inventory and impact assessment

Anna Kounina, Manuele Margni, Jean-Baptiste Bayart, Anne-Marie Boulay, Markus Berger, Cécile Bulle, Rolf Frischknecht, Annette Koehler, Llorenç Milà i Canals, Masaharu Motoshita, Montserrat Núñez, Gregory Peters, Stephan Pfister, Brad Ridoutt, Rosalie van Zelm, Francesca Verones and Sebastien Humbert

Article (2013)

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Purpose In recent years, several methods have been developed which propose different freshwater use inventory schemes and impact assessment characterization models considering various cause–effect chain relationships. This work reviewed a multitude of methods and indicators for freshwater use potentially applicable in life cycle assessment (LCA). This review is used as a basis to identify the key elements to build a scientific consensus for operational characterization methods for LCA.

Methods This evaluation builds on the criteria and procedure developed within the International Reference Life Cycle Data System Handbook and has been adapted for the purpose of this project. It therefore includes (1) description of relevant cause–effect chains, (2) definition of criteria to evaluate the existing methods, (3) development of sub-criteria specific to freshwater use, and (4) description and review of existing methods addressing freshwater in LCA.

Results and discussion No single method is available which comprehensively describes all potential impacts derived from freshwater use. However, this review highlights several key findings to design a characterization method encompassing all the impact pathways of the assessment of freshwater use and consumption in life cycle assessment framework as the following: (1) in most of databases and methods, consistent freshwater balances are not reported either because output is not considered or because polluted freshwater is recalculated based on a critical dilution approach; (2) at the midpoint level, most methods are related to water scarcity index and correspond to the methodological choice of an indicator simplified in terms of the number of parameters (scarcity) and freshwater uses (freshwater consumption or freshwater withdrawal) considered. More comprehensive scarcity indices distinguish different freshwater types and functionalities. (3) At the endpoint level, several methods already exist which report results in units compatible with traditional human health and ecosystem quality damage and cover various cause–effect chains, e.g., the decrease of terrestrial biodiversity due to freshwater consumption. (4) Midpoint and endpoint indicators have various levels of spatial differentiation, i.e., generic factors with no differentiation at all, or country, watershed, and grid cell differentiation.

Conclusions Existing databases should be (1) completed with input and output freshwater flow differentiated according to water types based on its origin (surface water, groundwater, and precipitation water stored as soil moisture), (2) regionalized, and (3) if possible, characterized with a set of quality parameters. The assessment of impacts related to freshwater use is possible by assembling methods in a comprehensive methodology to characterize each use adequately.

Uncontrolled Keywords

Ecosystem quality; Freshwater use; Human health; Life cycle assessment; Method review; Resources

Subjects: 1500 Environmental engineering > 1500 Environmental engineering
Department: Department of Chemical Engineering
Department of Mathematics and Industrial Engineering
Research Center: CIRAIG - International Reference Centre for the Life Cycle of Products, Processes and Services
PolyPublie URL: https://publications.polymtl.ca/4977/
Journal Title: The International Journal of Life Cycle Assessment (vol. 18, no. 3)
Publisher: Springer Nature
DOI: 10.1007/s11367-012-0519-3
Official URL: https://doi.org/10.1007/s11367-012-0519-3
Date Deposited: 02 May 2022 15:10
Last Modified: 19 Oct 2023 18:27
Cite in APA 7: Kounina, A., Margni, M., Bayart, J.-B., Boulay, A.-M., Berger, M., Bulle, C., Frischknecht, R., Koehler, A., Milà i Canals, L., Motoshita, M., Núñez, M., Peters, G., Pfister, S., Ridoutt, B., van Zelm, R., Verones, F., & Humbert, S. (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. https://doi.org/10.1007/s11367-012-0519-3


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