| Carmen Iulia Oniga | Polytechnique Montréal | IAH7 Pollution of surface waters and/or groundwaters involving groundwater-surface water interactions (Part 2)
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| Shalini Oogathoo | University of Saskatchewan | H8 Cold Regions Hydrology (Part 1)
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| Avery Opalka | University of Waterloo | B4 Methane Emissions and Measurement Techniques Across Canada (Part 2)
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| Claire Oswald | Toronto Metropolitan University | | |
| Phil Owens | University of Northern British Columbia | H7 General Hydrology (Part 2)
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| ATHUL PALLIATH | CSIR National Geophysical Research Institute | S4 Earthquake Source Physics: Mechanisms, Models, and Monitoring (Part 2)
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| AREF PANJEH FOULADGARAN | Western University | IAH2 Coastal hydrology and hydrogeology: Observations, modeling and prediction (Part 1)
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| Kyle Pawson | Nipissing University | B2 Peatland Disturbance and Policy in Canada (Part 1)
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| Camille Pelletier | University of Laval | IAH14 Innovative Development and Applications of Numerical Modelling for Process Understanding in Hydrogeology
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| Thomas Pendergast | Queen's University | H1 Coastal geomorphology and hydrodynamics
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| Matthew Pendleton | University of Waterloo | IAH7 Pollution of surface waters and/or groundwaters involving groundwater-surface water interactions (Part 2)
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| SD Perer | St. Francis Xavier University, Canada | B8 General Biogeosciences (Part 1)
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| Gabriela Perez | Western University | S4 Earthquake Source Physics: Mechanisms, Models, and Monitoring (Part 1)
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| Nia Perron | UQO | H3 Advances in forest ecohydrology (Part 1)
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| Dmitry Pershin | Université Laval | H9 Observation and modelling of snow and glacier processes (Part 1)
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| Ellen Petticrew | University Of Northern British Columbia | B8 General Biogeosciences (Part 2)
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| Cooper Pickering | University of Waterloo | IAH13 Hydrogeophysical Characterization of Groundwater Systems
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| Alexandre Plourde | Natural Resources Canada - Geological Survey of Canada (Atlantic) | S4 Earthquake Source Physics: Mechanisms, Models, and Monitoring (Part 1)
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| Nataša Popović | University of Waterloo | | |
| Raisha Pradisti | University of Alberta | S3 Earthquake site effects and hazards: Methods, models, and case studies from local to regional scales
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| Claudia Prehn | Dalhousie University | H2 Permafrost Hydrology and Hydrogeology Interactions (Part 1)
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| Eric Price | LI-COR | | |
| Li Pu | Dalhousie University | H2 Permafrost Hydrology and Hydrogeology Interactions (Part 1)
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| Hoi Leung Pun | University of Toronto | S4 Earthquake Source Physics: Mechanisms, Models, and Monitoring (Part 2)
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| Reza Rahimi | York university | IAH1 Contaminant transport and remediation in groundwater
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| Lisa Ramin | Université Laval | IAH5 Socio-Hydrogeology: Integrating Local Knowledge and Enhancing Knowledge Transfer
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| Arielle Rasoanaivo | Université du Québec en Outaouais | H3 Advances in forest ecohydrology (Part 1)
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| Ahmed Reda | University of Alberta | H4 River Ice Session One: Flow Hydraulics and Geomorphologic Changes in Ice-Affected Rivers
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| Miranda Reid | Geological Survey of Canada | H1 Coastal geomorphology and hydrodynamics
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| Bryn Reynolds | Carleton University | B4 Methane Emissions and Measurement Techniques Across Canada (Part 2)
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| Christine Rivard | Natural Resources Canada / Geological Survey of Canada | H7 General Hydrology (Part 3)
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| Sarah Rixon | University of Guelph | IAH7 Pollution of surface waters and/or groundwaters involving groundwater-surface water interactions (Part 2)
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| Hannah Roberts | University of Calgary | IAH6 Surface water-groundwater interactions through recharge, discharge, and contribution to ecosystems (Part 2)
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| Élise Rogers | Queen's University | H1 Coastal geomorphology and hydrodynamics
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| Prabin Rokaya | Alberta Environment and Protected Areas | H9 Observation and modelling of snow and glacier processes (Part 1)
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| Eric Rosa | Université du Québec en Abitibi-Témiscamingue | B6 Polluted Wetland Landscapes
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| Brittney Roughan | Saint Mary's University | IAH2 Coastal hydrology and hydrogeology: Observations, modeling and prediction (Part 1)
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| Pierre-Michel Rouleau | Memorial University | G1 Gravity Field and Reference Frames
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| Maël Roussey | University of Ottawa | S2 Marine Geophysics (Part 2)
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| Marjolaine Roux | UQAM | B5 Land-atmosphere fluxes and feedbacks to climate change (Part 2)
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| James Roy | Environment and Climate Change Canada | IAH7 Pollution of surface waters and/or groundwaters involving groundwater-surface water interactions (Part 2)
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| Hazen Russell | Geological Survey of Canada | IAH11 Building Canada’s Groundwater Monitoring Future: From Regional Networks to a National Framework
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| KYOUNGHO RYU | Laval University | B5 Land-atmosphere fluxes and feedbacks to climate change (Part 2)
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| Yoni Ryuh | University of Waterloo | IAH2 Coastal hydrology and hydrogeology: Observations, modeling and prediction (Part 2)
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| Gianna Saarenvirta | Trent University | B3 Advances in Biogeosciences: Contributions from Early Career Researchers (Part 2)
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| Mir Jafar Sadegh Safari | Toronto Metropolitan University | H11 Transforming Hydrological Insights with Innovative Isotopic, Geochemical and Modelling Approaches
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| Arielle Santos | Western University | | |
| Patrick Schaefer | DataStream Initiative | | |
| Andrew Schaeffer | Natural Resources Canada, Geological Survey of Canada | S2 Marine Geophysics (Part 1)
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| Meg Schmidt | University of Waterloo | B3 Advances in Biogeosciences: Contributions from Early Career Researchers (Part 1)
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