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Rattlesnake Knoll is a small, isolated 30-meter-high mound of igneous breccia in the center of Spring Valley, White Pine County, Nevada. There is a small gravity anomaly associated with the knoll which, when combined with an initial, limited ground magnetic survey, indicates that rocks of the knoll probably extend northward in the subsurface. To explore this possibility, a 16-kilometer ground magnetic traverse was conducted in 2006 mainly along U.S. Route6/50, just north of the knoll.Magnetic data were obtained using a portable cesium vapor magnetometer integrated with a differential GPS receiver. The magnetometer was mounted on a non-magnetic aluminum fame and towed behind a vehicle, with measurements taken at...
These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Accurate delineations of irrigated acreage are critical in the development of water-use estimates and in determining an accurate water budget for the hydrographic basins of the BARCAS study area. Currently, irrigated acreage is estimated routinely for only a few basins in the study area and these acreages are calculated and reported by township range section, quarter, and quarter-quarter. Satellite imagery from the Landsat Thematic...
These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Accurate delineations of irrigated acreage are needed for the development of water-use estimates and in determining water-budget calculations for the Basin and Range carbonate-rock aquifer system (BARCAS) study. ISatellite imagery from the Landsat Thematic Mapper and Enhanced Thematic Mapper platforms were used to delineate irrigated acreage on a field-by-field basis for the entire study area. Six hundred and forty-three fields were...
Categories: pre-SM502.8;
Tags: Basin and Range,
Basin and Range carbonate-rock aquifer study,
Butte Valley,
Cave Valley,
Jakes Valley,
These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. These data represent potential areas of ground-water discharge for selected hydrographic areas in eastern Nevada and western Utah. The data are based on phreatophyte boundaries published by the U.S. Geological Survey (USGS) and on unpublished boundaries mapped by the Southern Nevada Water Authority (SNWA). Selected basins also were mapped by the USGS during an aerial field reconnaissance. The largest phreatophyte extent from all...
Categories: pre-SM502.8;
Tags: Butte Valley,
Cave Valley,
Evapotranspiration,
Great Basin,
Ground-water discharge,
These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set consists of sub delineations of the hydrographic area (HA) boundaries and polygons drawn at 1:1,000,000 scale for the Great Basin supplemented by information from HA drawn at 1:750,000 scale where necessary. See the process steps for more information.
Categories: pre-SM502.8;
Tags: Basin and Range,
Butte Valley,
Cave Valley,
Great Basin,
Hydrographic Area,
These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Accurate estimates of ground-water discharge are crucial in the development of a water budget for the Basin and Range Carbonate-rock Aquifer System (BARCAS) study area. One common method used throughout the southwest United States is to estimate ground-water discharge from evapotranspiration (ET). ET is a process by which water from the Earth's surface is transferred to the atmosphere. The volume of water lost to the atmosphere by...
These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Delineated irrigated acreage in 2005 was field verified from September 26 to 29 and November 1 to 3 , 2005. Fields were visited to confirm that irrigation had occurred in remotely delineated polygons. The irrigation method, crop type, and water source for each field also was inventoried. The location of each delineated field was checked using a handheld GPS. Digital photographs were taken of each field and the bearing and time of...
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