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TitleThe influence of spatial and temporal resolution when simulating groundwater-surface water interactions with a fully integrated model
AuthorFrey, S K; Berg, S J; Hwang, H -T; Park, Y -J; Sudicky, E A; Russell, H A JORCID logo
SourceGAC-MAC 2017, abstracts/GAC-MAC 2017, résumés; Geological Association of Canada-Mineralogical Association of Canada, Joint Annual Meeting, Abstracts Volume vol. 40, 2017 p. 116 Open Access
logo Open Access
LinksOnline - En ligne (complete volume, PDF, 3.09 MB)
Alt SeriesEarth Sciences Sector, Contribution Series 20160429
PublisherGeological Association of Canada
MeetingGAC-MAC 2017: Geological Association of Canada-Mineralogical Association of Canada Annual Meeting; Kingston, ON; CA; May 14-18, 2017
Mediaon-line; digital
File formatpdf (Adobe® Reader®)
ProgramGroundwater Geoscience, Aquifer Assessment & support to mapping
Released2017 05 01
AbstractIncreasingly, groundwater - surface water (GW-SW) interactions are being recognized for their significant influence on the hydrologic characteristics of Southern Ontario. The behavior of the hydrologic system in turn has a strong influence on contaminant fate and transport, which then ultimately affects water quality within the Laurentian Great Lakes. Because of climate and topographic variability, as well as heterogeneities in soil and subsurface lithology, quantifying GW-SW interactions at a scale meaningful to the Great Lakes requires the use of advanced modelling tools. However, in hydrologic modelling there is always a trade-off between spatial scale and process resolution, and as of yet a comprehensive understanding of how model resolution influences simulated GW-SW interactions does not exist. To address this outstanding question, we are conducting a detailed modelling-based study of GW-SW interactions within the Grand River Watershed, using the Hydro-GeoSphere fully-integrated GW-SW modeling platform. As part of the work, we are employing two watershed scale (7000 km2) models built at contrasting resolutions (low: 625K nodes; high: 3.5M nodes) and an ultra-high resolution 2D cross-sectional model to simulate GW-SW exchanges. Using transient climate/weather data at temporal resolutions ranging from monthly to daily as forcing data, simulations are being conducted for a range of different hydrologic conditions that span the drought to flood spectrum. Output from the simulations will be used to provide insight on how model spatial and temporal resolution can influence the interpretation of GW-SW interactions within a heterogeneous and highly dynamic hydrologic environment. Results from this work are intended to guide future modelling initiatives that require realistic multi-dimensional and highly transient representation of the fully-coupled GW-SW flow system.
Summary(Plain Language Summary, not published)
Scaling study of a numeric groundwater flow mode in Southern Ontario in preparation for regional modeling.

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