|Title||Mapping transboundary buried valley aquifers along the Manitoba-North Dakota border|
|Author||Hinton, M J; Logan, C E; Pugin, A J -M; Pullan, S E; Oldenborger, G A; Sharpe, D R|
|Source||39th International Association of Hydrogeologists (IAH) Congress, abstracts; by International Association of Hydrogeologist; 2012 p. 1|
|Alt Series||Earth Sciences Sector, Contribution Series 20130090|
|Meeting||39th International Association of Hydrogeologists (IAH) Congress; Niagara Falls; CA; September 16-21, 2012|
|NTS||62E; 62F; 62G; 62H|
|Area||North Dakota; Canada; United States of America|
|Lat/Long WENS||-101.0000 -95.0000 49.5000 48.5000|
|Subjects||hydrogeology; groundwater; groundwater resources; groundwater regimes; buried valleys|
Aquifer Assessment & support to mapping|
|Abstract||In south-western Manitoba, at least four buried valley aquifers cross the international border between the United States and Canada. The Geological Survey of Canada is using innovative approaches to
delineate buried valley aquifers along the Manitoba-North Dakota border. Mapping of buried valley aquifers is particularly challenging in these areas due to the lack of surface expression and their narrow, elongated shape. Studies using water well
records and targeted drilling programs have had limited success in delineating the buried valleys and developing sound conceptual geological and hydrogeological models because they lack the required data resolution and continuity. Key elements of the
characterization of buried valley aquifer systems include the delineation of aquifer boundaries, hydraulic boundaries within the aquifers as well as any permeable and hydraulically connected elements of the valley fill that may provide pathways for
aquifer replenishment. Surface and airborne geophysical methods provide spatially continuous datasets that greatly assist aquifer mapping, conceptual model development and the selection of key study areas for additional ground based investigations.
This presentation will highlight data collected for the Spiritwood, Medora-Waskada and Pierson transboundary buried valley aquifers -- three aquifers with significant differences in their dimensions and geological architecture.|
A complication in
the study of transboundary aquifers is data integration across the border. For the Spiritwood aquifer, data collection programs on either side of the border have differed greatly. Whereas there are extensive geophysical data on the Canadian side,
there has been more focus on targeted borehole drilling, piezometers and monitoring data on the US side. These differences make it difficult to provide consistent mapping and aquifer characterization across the international boundary.
|Summary||(Plain Language Summary, not published)|
Much sand and gravel that were deposited in valleys before and during glaciation have been buried by glacial sediment and now form buried valley
aquifers. In south-western Manitoba, at least four buried valley aquifers cross the international border between the United States and Canada. The Geological Survey of Canada is using new methods to characterize and map buried valley aquifers. These
include geophysical techniques that measure the properties of buried sediments. This presentation will highlight data from the Spiritwood, Medora-Waskada and Pierson buried valley aquifers - three aquifers with significant differences in their
dimensions and geological structure. Mapping buried valleys across the border is made more difficult by different approaches to mapping on each side of the border.