| Title | Assessment of nearshore groundwater discharge to Lake Simcoe, Ontario and identification of regional hydrogeological controls |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Wallace, H; Robinson, C E |
| Source | Southern Ontario groundwater project 2014-2019: summary report; by Russell, H A J (ed.); Kjarsgaard, B A (ed.); Geological Survey of Canada, Open File 8536, 2020 p. 191-201, https://doi.org/10.4095/321105
 Open Access |
| Year | 2020 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Southern Ontario
groundwater project 2014-2019: summary report |
| File format | pdf |
| Province | Ontario |
| NTS | 31D/03; 31D/04; 31D/05; 31D/06; 31D/11; 31D/12 |
| Area | Lake Simcoe |
| Lat/Long WENS | -79.8333 -79.1667 44.6303 44.1647 |
| Subjects | hydrogeology; surficial geology/geomorphology; Nature and Environment; Science and Technology; groundwater; groundwater resources; aquifers; groundwater regimes; groundwater flow; groundwater discharge;
discharge rates; groundwater pollution; surface waters; lakes; glacial lakes; nearshore environment; shorelines; modelling; sediments; channel deposits; clays; gravels; organic deposits; sands; silts; glacial deposits; moraines; radioisotopes; radon;
permeability; Oro Moraine; Oak Ridges Moraine; lacustrine sediments; made ground (fill); anthropogenic deposits; Phanerozoic; Cenozoic; Quaternary; Paleozoic; Silurian |
| Illustrations | location maps; geoscientific sketch maps; plots; tables |
| Program | Groundwater Geoscience Aquifer Assessment & support to mapping |
| Released | 2020 05 28 |
| Abstract | Groundwater discharge may be an important pathway for delivering pollutants to large lakes, but this pathway is not well understood. The objective of this study was to quantify the spatial variability
and volume of direct nearshore groundwater discharge to Lake Simcoe, Ontario, and evaluate linkages between the observed spatial distribution of groundwater discharge and regional hydrogeological features. Direct nearshore groundwater discharge was
quantified using the naturally occurring radon isotope tracer, 222Rn. Boat surveys were conducted along 80% of the Lake Simcoe shoreline using portable radon detection equipment. Shoreline areas with high direct groundwater discharge were identified
and the total direct nearshore groundwater discharge to Lake Simcoe was estimated to be 11.3 ± 2% of the total tributary inputs. Shoreline areas with high groundwater discharge were related to the presence of permeable nearshore surficial sediments
and tunnel channel deposits. These features are thought to provide connectivity between the regional aquifer system and the lake. The study findings can be broadly applied in other studies evaluating direct groundwater inputs into large lakes of
glacial origin. |
| Summary | (Plain Language Summary, not published)
Collection of papers on work completed in the past five years as part of the southern Ontario Groundwater Project. This edited volume is a collection of
currently unreported work. |
| GEOSCAN ID | 321105 |
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