 |
| Titel |
A modeling study of heterogeneity and surface water-groundwater interactions in the Thomas Brook catchment, Annapolis Valley (Nova Scotia, Canada) |
| VerfasserIn |
M. J. Gauthier, M. Camporese, C. Rivard, C. Paniconi, M. Larocque |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 9 ; Nr. 13, no. 9 (2009-09-08), S.1583-1596 |
| Datensatznummer |
250011990
|
| Publikation (Nr.) |
 copernicus.org/hess-13-1583-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| 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. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|