Wright reports: "Beneath the surface resistive layer is a sequence of layers with varying resistivities
, which generally decrease in resistivity with depth.
To investigate the downward movement of irrigation water and to allow a temperature correction of the measured resistivities
, soil temperature was measured every 15 min at 150, 300, 450, 850, and 1200 mm depth using a probe comprising five individual HOBO Water Temp Pro v2 sensors (Onset Computer Corporation, Bourne, MA).
This is followed by layers having resistivities
For each sample, the resistivities
were checked in five different spots and their average was reported.
The high resistivities
observed are typical of fresh granite rocks.
Weathered traps usually show resistivities
less than 25 ohm-m.
Plastics generally have surface resistivities
Often the calculated resistivities
vary over decades, even in the short term, and include negative values.
Although the Santa Eulalia District was discovered in 1591, a recent IP survey over one of the massive sulphide deposits produced virtually identical responses to those seen at Koala, with chargeabilities increasing with depth and overlain by zones of higher resistivities
reflecting alteration of the host limestones.
At 35 wt% CNF content, the PR-24 and PR-19 composites possessed volume resistivities
of 4 X [10.
are related to important geologic parameters of the subsurface including types of rocks and soils, porosity, and degree of saturation (Keller and Frischknecht, 1966).
S-250 is also reportedly the first PP compound to achieve a consistent surface resistivity of 10% ohm/sq, "an optimum target," BFG says, that was previously considered unobtainable with other ESD technologies that gave resistivities
either too high or too low.