| Title | A modeling study of heterogeneity and surface water-groundwater interactions in the Thomas Brook catchment, Annapolis Valley (Nova Scotia, Canada) |
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| Author | Gauthier, M J; Camporese, M; Rivard, C ; Paniconi, C; Larocque, M |
| Source | Hydrology and Earth System Sciences vol. 13, no. 9, 2009 p. 1583-1596, https://doi.org/10.5194/hess-13-1583-2009  Open Access |
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| Year | 2009 |
| Alt Series | Earth Sciences Sector, Contribution Series 20080707 |
| Publisher | Copernicus GmbH |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Nova Scotia |
| NTS | 21H/02 |
| Area | Thomas Brook; Annapolis Valley |
| Lat/Long WENS | -64.7500 -64.7000 45.1167 45.0333 |
| Subjects | hydrogeology; surficial geology/geomorphology; models; modelling; groundwater; groundwater resources; groundwater regimes; groundwater flow; groundwater circulation; hydrologic environment; hydrologic
budget; glacial deposits; marine deposits; Cenozoic; Quaternary |
| Illustrations | location maps; graphs; tables; cross-sections; plots |
| Program | Groundwater Mapping Program |
| Released | 2009 09 08 |
| Abstract | A modelling study of the impacts of subsurface heterogeneity on the hydrologic response of a small catchment is reported. The study is focused in particular on the hydraulic connection and interactions
between surface water and groundwater. A coupled (1-D surface/3-D subsurface) numerical model is used to investigate, for a range of scenarios, the spatio-temporal patterns of response variables such as return flow, recharge, groundwater levels,
surface saturation, and streamflow. Eight scenarios of increasing geological complexity are simulated for an 8 km2 catchment in the Annapolis Valley (eastern Canada), introducing at each step more realistic representations of the geological strata
and corresponding hydraulic properties. In a ninth scenario the effects of snow accumulation and snowmelt are also considered. The results show that response variables and significant features of the catchment (e.g. springs) can be adequately
reproduced using a representation of the geology and model parameter values that are based on targeted fieldwork and existing databases, and that reflect to a sufficient degree the geological and hydrological complexity of the study area. The
hydraulic conductivity values of the thin surficial sediment cover (especially till) and of the basalts in the upstream reaches emerge as key elements of the basin's heterogeneity for properly capturing the overall catchment response. |
| GEOSCAN ID | 226504 |
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