This grid represents the distribution of hydraulic head in the Keg River / Winnipegosis hydrostratigraphic unit (HSU). It is a result of a geostatistical model which was constructed using publicly available pressure data from drillstem tests from oil and gas wells as well as industry monitoring wells accessed through environmental impact assessment reports.
The hydraulic head surface was mapped at a regional scale using many years of data, thus providing a good indication of regional groundwater flow within the unit rather than site-specific values.
The following statistics describe the accuracy of the geostatistical layer used to create the final grid.
Mean error: -1.3 m
Root mean square error: 54 m
Mean standardized error: -0.006
Root mean square standardized: 1.1
Average standard error: 49 m
Step 1 (Modelling the surface): A simple kriging algorithm was used in the ArcMap Geostatistical Analyst extension to interpolate the hydraulic head values and create a grid of the head surface of the Keg River / Winnipegosis HSU.
Method Report:
Output surface type: Prediction
Variable: Semivariogram
Type: Spherical
Neighbourhood type: standard
Samples: 309
Cell size: 1000 m
Step 2 : The final grid was clipped based on the extent of the Keg River / Winnipegosis HSU, and spatial distribution of data.