Author: R. W. CraigPublisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 238
Book Description
Geohydrology of Rocks Penetrated by Test Well UE-25p#1, Yucca Mountain Area, Nye County, Nevada
Author: R. W. CraigPublisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 238
Book Description
Geohydrology of Rocks Penetrated by Test Well USW H-6, Yucca Mountain, Nye County, Nevada
Author: R. W. CraigPublisher:
ISBN:
Category : Hydrogeology
Languages : en
Pages : 52
Book Description
Geohydrology of Rocks Penetrated by Test Well USW H-6, Yucca Mountain, Nye County, Nevada
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 40
Book Description
Test well USW H-6 is one of several wells drilled in the Yucca Mountain area near the southwestern part of the Nevada Test Site for investigations related to isolation of high-level nuclear waste. This well was drilled to a depth of 1,220 meters. Rocks penetrated are predominantly ash-flow tuffs of Tertiary age, with the principal exception of dacitic lave penetrated at a depth from 877 to 1,126 meters. The composite static water level was about 526 meters below the land surface; the hydraulic head increased slightly with depth. Most permeability in the saturated zone is in two fractured intervals in Crater Flat Tuff. Based on well-test data using the transitional part of a dual-porosity solution, an interval of about 15 meters in the middle part of the Bullfrog Member of the Crater Flat Tuff has a calculated transmissivity of about 140 meters squared per day, and an interval of about 11 meters in the middle part of the Tram Member of the Crater Flat Tuff has a calculated transmissivity of about 75 meters squared per day. The upper part of the Bullfrog Member has a transmissivity of about 20 meters squared per day. The maximum likely transmissivity of any rocks penetrated by the test well is about 480 meters squared per day, based on a recharge-boundary model. The remainder of the open hole had no detectable production. Matrix hydraulic conductivity ranges from less than 5 x 10−5 to 1 x 10−3 meter per day. Ground water is a sodium bicarbonate type that is typical of water from tuffaceous rock of southern Nevada. The apparent age of the water is about 14,6000 years. 29 refs., 26 figs., 5 tabs.
Geohydrology of Rocks Penetrated by Test Well USW H-6, Yucca Mountain, Nye County, Nevada
Author: R. W. CraigPublisher:
ISBN:
Category : Hydrogeology
Languages : en
Pages : 40
Book Description
Hydrogeology of Rocks Penetrated by Test Well JF-3 Jackass Flats, Nye County, Nevada
Author: Russell W. PlumePublisher:
ISBN:
Category : Hydrogeology
Languages : en
Pages : 32
Book Description
Hydraulic Tests of Miocene Volcanic Rocks at Yucca Mountain and Pahute Mesa and Implications for Groundwater Flow in the Southwest Nevada Volcanic Field, Nevada and California
Author: Arthur L. GeldonPublisher: Geological Society of America
ISBN: 0813723817
Category : Science
Languages : en
Pages : 100
Book Description
Hydrogeology of Rocks Penetrated by Test Well JF-3, Jackass Flats, Nye County, Nevada
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Book Description
The U.S. Department of Energy and U.S. Geological Survey are monitoring water levels in southern Nevada and adjacent parts of California in response to concern about the potential effects of pumping ground water to support the Yucca Mountain Site-Characterization Program. Well JF-3 was drilled in the western part of Jackass Flats for monitoring water levels, for determining the likelihood of a hydraulic connection between well JF-3 and production wells J-12 and J-13, and for measuring the hydraulic properties of the Topopah Spring Tuff. The borehole for JF-3 penetrated about 480 feet of alluvium and 818 feet of underlying volcanic rock. The well was finished at a depth of 1,138 feet below land surface near the base of the Topopah Spring Tuff, which is the principal volcanic-rock aquifer in the area. The Topopah Spring Tuff at well JF-3 extends from depths of 580 feet to 1,140 feet and consists of about 10 feet of partly to moderately welded ash-flow tuff; 10 feet of vitrophyre; 440 feet of devitrified, moderately to densely welded ash-flow tuff; 80 feet of densely welded ash-flow tuff; 10 feet of vitric, nonwelded to partly welded ash-flow tuff; and 10 feet of ashfall tuff. Fractures and lithophysae are most common in the devitrified tuff, especially between depths of 600 feet and 1,040 feet. Much of the water produced in well JF-3 probably comes from the sequence of these devitrified tuffs that is below the water table. The transmissivity of the aquifer is an estimated 140,000-160,000 feet squared per day and hydraulic conductivity is 330-370 feet per day. These values exceed estimates made at well J-13 by two orders of magnitude. Such large differences may be accounted for by differences in the development of fractures and lithophysae in the Topopah Spring Tuff at the two wells.
Analysis of Water-level Data in the Yucca Mountain Area, Nevada, 1985-95
Author: Robert P. GravesPublisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 152
Book Description
Hydrogeology of Rocks Penetrated by Test Well
Author: Russell W. Plume and Richard J. La CameraPublisher:
ISBN:
Category :
Languages : en
Pages : 32
Book Description
Author: