About the Authors

Matt J. O'Callaghan

m.j.ocallaghan@bham.ac.uk (MO'C); j.p.sadler@bham.ac.uk (JS)

Affiliation School of Geography, Earth and Environmental Sciences, The University of Birmingham, Birmingham, United Kingdom

David M. Hannah

Affiliation School of Geography, Earth and Environmental Sciences, The University of Birmingham, Birmingham, United Kingdom

Ian Boomer

Affiliation School of Geography, Earth and Environmental Sciences, The University of Birmingham, Birmingham, United Kingdom

Mike Williams

Affiliation Environment Agency, Exeter, United Kingdom

Jon P. Sadler

m.j.ocallaghan@bham.ac.uk (MO'C); j.p.sadler@bham.ac.uk (JS)

Affiliation School of Geography, Earth and Environmental Sciences, The University of Birmingham, Birmingham, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MO'C DH JS MW. Performed the experiments: MO'C. Analyzed the data: MO'C JS DH IB. Wrote the paper: MO'C DH JS MW.