NEWS & EVENTS Event Calendars Event

Time & Date

9:30-11:30 AM, Wed, Jun. 3, 2020

Venue

ZOOM, please sign up by scanning Code below

Host

Ling Li, Ph.D., PI of School of Engineering, Westlake University

Audience

Faculty and Staff,Graduate Students

Category

Academics and Research

77th Westlake Master Forum | Jeffrey J. McDonnell: Compartmentalization of the Terrestrial Water Cycle

Time: 9:30-11:30 AM, Wednesday, Jun. 3, 2020

Host: Ling Li, Ph.D., PI of School of Engineering, Westlake University

Participation: ZOOM, please sign up by scanning Code below



Speaker: Jeffrey J. McDonnell, Professor of Hydrology and Associate Director of the Global Institute for Water Security at the University of Saskatchewan, Canada


Jeffrey J. McDonnell is a hydrologist with a PhD and DSc from the University of Canterbury, New Zealand, where he was a Commonwealth Scholar. He taught in the USA for many years where he was Richardson Chair in Watershed Science and University Distinguished Professor Oregon State University. Since 2012, he has been Professor of Hydrology and Associate Director of the Global Institute for Water Security at the University of Saskatchewan. Jeff’s work focuses on new ways to measure, understand and model streamflow generation processes. He has co-authored ~300 articles on watershed hydrology and co-edited the Elsevier textbook “Isotope Tracers in Catchment Hydrology”. He was the founding Editor of Hydrological Processes “HPToday” and has served as Associate Editor for Water Resources Research, Journal of Hydrology, Hydrological Sciences Journal and Ecohydrology. He is an elected Fellow of the Royal Society of Canada (Canada’s National Academy of Science) and is an elected Fellow of the American Geophysical Union and the Geological Society of America. He was the 2016 winner of the International Hydrology Prize (Dooge Medal) from the International Association of Hydrological, UNESCO and World Meteorological Organization. Previously, he has received the Dalton Medal from the European Geophysical Union and the Birdsall-Dreiss Distinguished Lecturer Award from the Geological Society of America.


Title: 

Compartmentalization of the Terrestrial Water Cycle


Abstract:

Our quantitative understanding of the terrestrial water cycle dates back to Pierre Perrault who in 1674 “measured” the water budget of a 145 km² headwater catchment of the River Seine near Dijon, France. He showed that rainfall volume explained sufficiently the water carried off by rivers and removed by evaporation. This study demonstrated that ‘underground condensation in reservoirs’ was not needed explain streamflow or plant transpiration---a concept previously debated since the ancient Greeks. Subsequently, the catchment water balance (inputs-outputs=change in storage) has become one of the most important equations in the geosciences. However, recent work using stable isotope tracers shows a much more complex water cycle than simple hydrometric observations suggest. At scales from global to microscopic, the water cycle appears highly compartmentalized and poorly mixed at timescales well beyond the annual measurements of input and output. This talk summarizes recent work and attempts to make a case for thinking about the stored inventory of old water in our water balance accounting model.


Sign up by scanning code

Time & Date

9:30-11:30 AM, Wed, Jun. 3, 2020

Venue

ZOOM, please sign up by scanning Code below

Host

Ling Li, Ph.D., PI of School of Engineering, Westlake University

Audience

Faculty and Staff,Graduate Students

Category

Academics and Research