1. Department of Civil and Environmental Engineering, Stanford University, Stanford, California, USA.
2. Emmett Interdisciplinary Program in Environment and Resources, Stanford University, Stanford, California, USA.
3. Department of Mathematics and Statistics, University of Vermont, Burlington, Vermont, USA.
4. The Gund Institute for the Environment, University of Vermont, Burlington, Vermont, USA.
5. Department of Computer Science, Stanford University, Stanford, California, USA.
6. School of Engineering, Dartmouth College, Hanover, New Hampshire, USA.