Polluted surface waters that infiltrate into adjacent aquifers can impair groundwater quality. Contaminated groundwater discharging into streams, lakes, wetlands or the ocean can compromise their water quality. Indeed, various types of groundwater-surface water interactions and related processes can spread pollution across such boundaries or even remedy it. And we want to hear all about it, and the factors affecting it, from both sides of the groundwater-surface water interface (hydrogeology – hydrology disciplines), in this joint CGU/IAH-CNC session. Pollutant sources can encompass anthropogenic contaminants or be natural in origin (nutrients, metals, salts, etc.) where human activity has thrown things out of balance, and include legacy or emerging contaminants. Impacts on drinking water supplies and on ecosystems (aquatic or terrestrial), and attenuation processes active within the transition zone (between groundwater and surface water) are especially of interest. Studies on assessing the challenges and mechanisms to actively managing or remediating these pollutants (using gw-sw interaction related approaches) are most welcome.

• 2:00 pm – 2:15 pm | An Integrated Quality-Quantity Modeling Framework for Assessing Lake Health in Remote Regions – Carmen Iulia Oniga
• 2:15 pm – 2:30 pm | Hydrological Controls on Phosphorus Source–Sink Dynamics in a Freshwater Mineral Wetland in Eastern Ontario – Shir Gruber
• 2:30 pm – 2:45 pm | Characterizing spatiotemporal variability of nutrient export in a shallow groundwater-dominated tile-drained catchment – Larissa Gospodyn
• 2:45 pm – 3:00 pm | Understanding nutrient dynamics through a data-driven approach in an intensively managed agricultural watershed – Sarah Rixon
• 3:00 pm – 3:15 pm | Spatiotemporal Variability in Nitrate Loading to an Agricultural Stream in a Southern Ontario Watershed – Matthew Pendleton
• 3:15 pm – 3:30 pm | Critiquing the Great Lakes sub-indicator approach to assess groundwater’s influence on surface water quality at the regional/basin scale – James Roy