1981, PhD in Civil and Environmental Engineering, University of Texas, Austin. Alan & Carol Silberstein Professor of Engineering & Director, Columbia Water Center, Columbia University; research focus: global water security, climate risk management and climate change adaptation; Floods and Droughts, Mining and Water Risk. Author of >300 journal papers (https://scholar.google.com/citations?user=JA0o2TUAAAAJ&hl=en) on surface and ground water hydrology, climate, flood and drought risk, water resources management and applied statistics. Leading America's Water Initiative, Quantitative Methods for Assessing water related Financial Risk associated with Mining; Global Flood Initiative; and Global Water Sustainability Initiative. Co-organize Rethinking Water annual events on water infrastructure with Sciencs Capital and others.