Spatial distribution of potential near surface moisture flux at Yucca Mountain Metadata

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Title

  • Main Title Spatial distribution of potential near surface moisture flux at Yucca Mountain

Creator

  • Author: Flint, A.L.
    Creator Type: Personal
  • Author: Flint, L.E.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)

Publisher

  • Name: Geological Survey, Mercury, NV (United States)
    Place of Publication: United States

Date

  • Creation: 1994-12-31

Language

  • English

Description

  • Content Description: An estimate of the areal distribution of present-day surface liquid moisture flux at Yucca Mountain was made using field measured water contents and laboratory measured rock properties. Using available data for physical and hydrologic properties (porosity, saturated hydraulic conductivity moisture retention functions) of the volcanic rocks, surface lithologic units that are hydrologically similar were delineated. Moisture retention and relative permeability functions were assigned to each surface unit based on the similarity of the mean porosity and saturated hydraulic conductivity of the surface unit to laboratory samples of the same lithology. The potential flux into the mountain was estimated for each surface hydrologic unit using the mean saturated hydraulic conductivity for each unit and assuming all matrix flow. Using measured moisture profiles for each of the surface units, estimates were made of the depth at which seasonal fluctuations diminish and steady state downward flux conditions are likely to exist. The hydrologic properties at that depth were used with the current relative saturation of the tuff, to estimate flux as the unsaturated hydraulic conductivity. This method assumes a unit gradient. The range in estimated flux was 0.02 mm/yr for the welded Tiva Canyon to 13.4 mm/yr for the nonwelded Paintbrush Tuff. The areally averaged flux was 1.4 mm/yr. The major zones of high flux occur to the north of the potential repository boundary where the nonwelded tuffs are exposed in the major drainages.
  • Physical Description: 8 p.

Subject

  • Keyword: Hydrology
  • Keyword: Ground Water
  • STI Subject Categories: 05 Nuclear Fuels
  • STI Subject Categories: 58 Geosciences
  • Keyword: Porosity
  • Keyword: Spatial Distribution
  • Keyword: Tuff
  • Keyword: Yucca Mountain
  • Keyword: Physical Properties
  • Keyword: Underground Disposal
  • Keyword: High-Level Radioactive Wastes
  • Keyword: Hydraulic Conductivity
  • Keyword: Yucca Mountain Project

Source

  • Conference: International high-level radioactive waste management conference, Las Vegas, NV (United States), 22-26 May 1994

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Other: DE96001465
  • Report No.: CONF-940553--99
  • Grant Number: AI08-92NV10874
  • Office of Scientific & Technical Information Report Number: 119436
  • Archival Resource Key: ark:/67531/metadc624563

Note

  • Display Note: INIS; OSTI as DE96001465