Letter Report: Borehole Flow and Horizontal Hydraulic Conductivity with Depth at Well ER-12-4

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Borehole flow and fluid temperature during pumping were measured at well ER-12-4 at the Nevada Test Site in Nye County, Nevada. This well was constructed to characterize the carbonate aquifer. The well is cased from land surface to the total depth at 1,132 m (3,713 ft bgs) below ground surface (bgs). The screened section of the well consists of alternating sections of slotted well screen and blank casing from 948 to 1,132 m bgs (3,111 to 3,713 ft bgs). Borehole flow velocity (LT-1) with depth was measured with an impeller flowmeter from the top of the screened section to the ... continued below

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Oberlander, Phil L. & Russell, Charles E. December 31, 2005.

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Description

Borehole flow and fluid temperature during pumping were measured at well ER-12-4 at the Nevada Test Site in Nye County, Nevada. This well was constructed to characterize the carbonate aquifer. The well is cased from land surface to the total depth at 1,132 m (3,713 ft bgs) below ground surface (bgs). The screened section of the well consists of alternating sections of slotted well screen and blank casing from 948 to 1,132 m bgs (3,111 to 3,713 ft bgs). Borehole flow velocity (LT-1) with depth was measured with an impeller flowmeter from the top of the screened section to the maximum accessible depth while the well was pumped and under ambient conditions. A complicating factor to data interpretation is that the well was not filter packed and there is upward and downward vertical flow in the open annulus under ambient and pumping conditions. The open annulus in the well casing likely causes the calculated borehole flow rates being highly nonrepresentative of inflow from the formation. Hydraulic conductivities calculated under these conditions would require unsupportable assumptions and would be subject to very large uncertainties. Borehole hydraulic conductivities are not presented under these conditions.

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  • Report No.: DOE/NV/13609-LTR2005-003
  • Grant Number: AC52-00NV13609
  • DOI: 10.2172/862130 | External Link
  • Office of Scientific & Technical Information Report Number: 862130
  • Archival Resource Key: ark:/67531/metadc792757

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  • December 31, 2005

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • Nov. 29, 2016, 6:30 p.m.

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Oberlander, Phil L. & Russell, Charles E. Letter Report: Borehole Flow and Horizontal Hydraulic Conductivity with Depth at Well ER-12-4, report, December 31, 2005; United States. (digital.library.unt.edu/ark:/67531/metadc792757/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.