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2-M Probe Survey
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"A modified version of the 2 m temperature
"A modified version of the 2 m temperature probe survey was tested at the [[Salt Wells Geothermal Area]] in 2005.'"`UNIQ--ref-00000002-QINU`"' This technique was used to measure temperatures at relatively shallow depths of 30 cm, adapted for sites where the water table is at or near the land surface. The 30-cm probe survey technique uses a 1/8 inch diameter, 30-cm-long digital K-type thermocouple and probe to measure shallow temperatures at each sample point. Temperature measurements are taken by inserting the probe into the ground by hand, and require minimal equilibration times of 1-2 minutes owing to the small thermal mass of the device and the level of water saturation of the measured sediments. Temperature surveys at Salt Wells were conducted during the winter in February 2005, when background temperatures at 30 cm depth were near a seasonal minimum of 3 to 10°C. A continuous temperature test is also required for the application of this technique, in order to demonstrate the stability of temperatures at 30 cm depth and to provide a baseline dataset for distinguishing thermal anomalies from background temperature variations. At Salt Wells, the continuous 24 hour temperature test was conducted using a 3-wire Platinum Resistance Temperature Device (Pt-RTD) in February 2006, and showed that temperatures only varied by +/- 0.1°C during the day. From this data, it was determined that a temperature threshold of 12°C was sufficient to distinguish thermal anomalies from background temperatures at the site. <br> *[[:Data Collection and Mapping|Data Collection and Mapping]] **[[:2-M Probe Survey|2-M Probe Survey]] **[[:Fault Mapping|Fault Mapping]] **[[:Field Mapping|Field Mapping]] **[[:Hand-held X-Ray Fluorescence (XRF)|Hand-held X-Ray Fluorescence (XRF)]] **[[:Macrophotography|Macrophotography]] **[[:Portable X-Ray Diffraction (XRD)|Portable X-Ray Diffraction (XRD)" cannot be used as a page name in this wiki. The given value was not understood.
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