Distribution of Hydraulic Head in the Horseshoe Canyon / St. Mary River Hydrostratigraphic Unit

This map depicts the distribution of hydraulic head in groundwater in the Horseshoe Canyon / St. Mary River hydrostratigraphic unit (HSU). The map is a result of an ordinary kriging technique using publicly available data from Alberta Environment and Parks' (AEP) Alberta Water Well Information Database (AWWID).

The distribution of hydraulic head was mapped at a regional scale using many years of data, thus providing a good indication of hydraulic head within the unit rather than site-specific values. The uncertainty of prediction is depicted on an inset map, which shows the residual values (predicted value minus measured value) plotted at each location to indicate where underprediction and overprediction occurs. Two additional maps show the distribution of total dissolved solids, and the depth to and vertical thickness of the Horseshoe Canyon / St. Mary River HSU. The geometry and variable thickness of the Horseshoe Canyon / St. Mary River HSU is shown on schematic cross-sections.