Hydrologic utility of borehole temperatures in Areas 19 and 20, Pahute Mesa, Nevada Test Site
Borehole temperature logs from Areas 19 and 20 of the Nevada Test Site were examined in an attempt to obtain quantitative information on the hydrologic regime of Pahute Mesa. A qualitative assessment of the logs proved useful for identifying borehole static water levels and areas of water influx into the borehole. However, the uncertain quality of the data and the effects of borehole convection rendered the data of little value for quantitative hydrologic analysis. The presence of borehole convection suggests that the borehole thermal profile is not truly representative of the thermal regime in the adjacent porous medium. Static water levels were corrected for the effects of temperature; differences between corrected and uncorrected water levels range from 0.03 to 49.65 feet. Corrected water levels provide more accurate estimates of hydraulic heads, which in turn provide more accurate estimates of groundwater flow velocities and radionuclide transport. Although the corrections were limited to data from Areas 19 and 20, future groundwater studies on the Nevada Test Site should be cognizant of temperature effects on hydraulic heads, lest erroneous conclusions result. 21 refs., 45 figs., 6 tabs.
- Research Organization:
- Nevada Univ., Reno (USA). Water Resources Center
- DOE Contract Number:
- AC08-85NV10384
- OSTI ID:
- 5627951
- Report Number(s):
- DOE/NV/10384-19; ON: DE88003906
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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