1. Hydraulic Engineer, Stillwater Sciences, 2855 Telegraph Ave., Ste. 400, Berkeley, CA 94705 (corresponding author).
2. Geomorphologist, Stillwater Sciences, 2855 Telegraph Ave., Ste. 400, Berkeley, CA 94705.
3. Mathematician, Stillwater Sciences, 2855 Telegraph Ave., Ste. 400, Berkeley, CA 94705.
4. Assistant Professor, Dept. of Geosciences, San Francisco State Univ., 509 Thornton Hall, 1600 Holloway Ave., San Francisco, CA 94132.