Figure 1: Location of the water samples in relation to the terrain conductivity of the main stem of the Athabasca River (AR).

Terrain conductivity data is taken from Gibson et al.71, and ranges from 12 mS m−1 (dark blue) to 76 mS m−1 (light pink). The map is created using ArcGIS Desktop (ESRI 2011: Release 10.3. Redlands, CA: Environmental Systems Research Institute, http://www.esri.com/software/arcgis/arcgis-for-desktop) by taking the basemaps and reference layers information through basemap imagery (Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS User Community).