New observations of infiltration through fractured alluvium in Yucca Flat, Nevada Test Site: A preliminary field investigation

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Regional tectonics coupled with the subsurface detonation of nuclear explosives has caused widespread fracturing of the alluvium of Yucca Flat. Fractures deeper than 30 meters have been observed in boreholes. Some of these fractures are large enough to capture significant amounts of runoff during storm events. Evidence of stream capture by fractures and observations of runoff flowing into open fractures give qualitative evidence of infiltration to depths greater than several meters and possibly to the saturated zone. Our field observations contradict the assumption that little infiltration occurs on Yucca Flat. The larger, hydrologically important fractures are associated with geologic faults ... continued below

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41 p.

Creation Information

Kao, C.S.; Smith, D.K. & McKinnis, W.B. February 1, 1994.

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  • Kao, C.S. California Univ., Berkeley, CA (United States). Dept. of Civil Engineering
  • Smith, D.K. Lawrence Livermore National Lab., CA (United States)
  • McKinnis, W.B. Lawrence Livermore National Lab., Mercury, NV (United States)

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Description

Regional tectonics coupled with the subsurface detonation of nuclear explosives has caused widespread fracturing of the alluvium of Yucca Flat. Fractures deeper than 30 meters have been observed in boreholes. Some of these fractures are large enough to capture significant amounts of runoff during storm events. Evidence of stream capture by fractures and observations of runoff flowing into open fractures give qualitative evidence of infiltration to depths greater than several meters and possibly to the saturated zone. Our field observations contradict the assumption that little infiltration occurs on Yucca Flat. The larger, hydrologically important fractures are associated with geologic faults or the regional stress field. Additional field studies are needed to investigate the impact of fractures on the transport of contaminants.

Physical Description

41 p.

Notes

OSTI as DE94012589

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  • Other Information: PBD: Feb 1994

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  • Other: DE94012589
  • Report No.: UCRL-ID--116129
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/145212 | External Link
  • Office of Scientific & Technical Information Report Number: 145212
  • Archival Resource Key: ark:/67531/metadc626236

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • February 1, 1994

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 23, 2016, 5:39 p.m.

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Kao, C.S.; Smith, D.K. & McKinnis, W.B. New observations of infiltration through fractured alluvium in Yucca Flat, Nevada Test Site: A preliminary field investigation, report, February 1, 1994; California. (digital.library.unt.edu/ark:/67531/metadc626236/: accessed April 27, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.