1. Department of Geography, University of California, Los Angeles, California 90095-1524, United States
2. Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, United States
3. Office of Water Programs, California State University, Sacramento, California 95819-6025, United States
4. Institute of the Environment and Sustainability, University of California, Los Angeles, California 90095-1496, United States
5. Department of Economics, California State University, Sacramento, California 95819, United States