G. Mathias Kondolf, Professor, Departments of Landscape Architecture & Environmental Planning, and Geography, University of California Berkeley, USA. Gregory L. Morris, Principal, GLM Engineering COOP, San Juan, Puerto Rico, USA. George W. Annandale, Principal, Golder Associates, Lakewood, Colorado USA. Tetsuya Sumi, Professor, Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan.