The authors regret that the author list was incorrectly displayed in their original paper and apologise for any inconvenience caused. The correct author list can be found above and has been updated in the online version of the paper.

In addition, the Acknowledgements section was incomplete in the original paper. The full Acknowledgements are given below and have been updated in the online version of the paper.

This work was funded by The Water Forum. The authors thank both reviewers’ constructive comments, and the manuscript has been significantly improved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (http://creativecommons.org/licenses/by/4.0/).