Relations Between Aquifer Electrical and Hydraulic Properties

The primary factor controlling material‐level relations between aquifer electrical and hydraulic properties in the clay‐free aquifer materials of southern Rhode Island is an inverse relation between in‐situ porosity and grain size. In‐situ density, grain size and laboratory hydraulic conductivity data support this conclusion. Relations between either layer resistivities and hydraulic conductivity, or a Dar Zarrouk parameter and transmissivity, are influenced by aquifer layering and the position of the aquifer layer relative to nonproducing layers. In the study area, the best relations between electrical and hydraulic properties are obtained where the transverse resistance of the aquifer is measured.