Lezione 5

Proprietà dielettriche dell’acquaTypical conductivities of electrolytes, and examples from the Great Lakes.Natural sourcemS/mMeteoric waters(from precipitation)Surface waters(lakes & rivers)1 to 300.3 for very pure waters10,000 for salt lakes2 to 30 in igneous regions10 to 100 in sedimentary regionsSoil waters Up to 10,000average around 10Ground waterMine waters (copper, zinc etc. i.e.sulphates)6 to 30 in igneous regions1,000 in sedimentary regionsnot usually less than 3,000Note that Lake Superior is the westernmost lake and therefore in an igneous region, whileLake Ontario is the easternmost or sedimentary region. This may contribute to the generallymore conductive waters of the eastern lakes.The UBC Geophysical inversion facilityMetodologie Elettromagnetiche per la Geofisica – lezione n.5Dipartimento di Fisica “Edoardo Amaldi”