1. Department of Geography Simon Fraser University Burnaby BC V5A 1S6 Canada
2. School of Environmental Science Simon Fraser University Burnaby BC V5A 1S6 Canada
3. Department of Earth, Environmental and Planetary Sciences Rice University Houston TX 77005 USA
4. Department of Earth and Environmental Sciences Tulane University New Orleans LA 70118 USA
5. The Water Institute of the Gulf Baton Rouge LA 70825 USA
6. Golder Associates Inc. Redmond WA 98052 USA
7. Department of Geography The University of British Columbia Vancouver BC V6T 1Z2 Canada