Skip to main content
USGS - science for a changing world
Advanced Search

Filters: Tags: Sheep Range (X)

85 results (41ms)   

View Results as: JSON ATOM CSV
thumbnail
These simulated potentiometric surface contours represent prepumping (or steady-state) conditions for model layer 1 of the Death Valley regional ground-water flow system (DVRFS), an approximately 45,000 square-kilometer region of southern Nevada and California. The numerical ground-water flow model simulates prepumping conditions before 1913 and transient-flow conditions from 1913 to 1998 after pumping of ground water began. The DVRFS transient ground-water flow model is the most recent in a number of regional-scale models developed by the U.S. Geological Survey (USGS) for the U.S. Department of Energy (DOE) to support investigations at the Nevada Test Site (NTS) and at Yucca Mountain, Nevada (see "Larger Work Citation",...
Types: Citation; Tags: Clayton Valley, MODFLOW-2000, Clark County, China Ranch, Shoshone, All tags...
thumbnail
This digital geospatial data set contains the locations, values, and uncertainties of hydraulic-head observations used in the calibration of the transient model of the Death Valley regional ground-water flow system (DVRFS). The hydraulic-head observations were developed by compositing one or more water-levels measured in wells throughout the DVRFS model domain, a 45,000 square-kilometer region of southern Nevada and California. To develop hydraulic-head observations, nearly all available water levels for the DVRFS region through 2004 were compiled in Ground-Water Site Inventory (GWSI), the ground-water component of the U.S. Geological Survey (USGS) National Water Information System (NWIS) database. Water levels...
Types: Citation; Tags: water well, Clayton Valley, MODFLOW-2000, Clark County, China Ranch, All tags...
thumbnail
This digital dataset defines the surface traces of regional geologic structures designated as potential ground-water flow barriers in an approximately 45,000 square-kilometer area of the Death Valley regional ground-water flow system (DVRFS) in southern Nevada and California. Most geologic structures representing potential flow barriers were faults that were identified on the basis of length, offset, type of slip, orientation with respect to predominate ground-water flow directions, the location of springs, abrupt water level offsets, and hydraulic characteristics (Sweetkind and others, 2004). A subset of the potential ground-water flow barriers was incorporated into a transient ground-water flow model of the DVRFS...
Types: Citation; Tags: Clayton Valley, Clark County, China Ranch, Shoshone, Death Valley, All tags...
thumbnail
This digital data set defines the boundary of the southwestern Nevada volcanic field (SWNVF), an area of thick, regionally distributed volcanic rocks within the Death Valley regional ground-water flow system (DVRFS), a 100,000-square-kilometer region of southern Nevada and California. The SWNVF boundary encompasses an approximate 12,000 square-kilometer region and is based on a map of hydrogeologic controls on ground-water flow by Laczniak and others (1996). The SWNVF is characterized in part by a thick section of regionally distributed welded tuffs derived from a central complex of nested calderas that erupted from about 16 Ma to 5 Ma. The SWNVF boundary defines the extent of these particular volcanics and was...
Types: Citation; Tags: California Valley, Saline Valley, Yucca Mountain, Spring Mountains, Sarcobatus Flat, All tags...
thumbnail
This digital data set is a compilation of reference points representing surface-water features, ground-water levels, and topographic settings in California that were used for the regional ground-water potential map by Bedinger and Harrill (2004). The regional ground-water potential map was developed to assess potential interbasin flow in the Death Valley regional ground-water flow system (DVRFS), a 100,000-square-kilometer region of southern Nevada and California. To obtain an adequate network of control points, Bedinger and Harrill (2004) also used regional potential altitudes derived from springs and deep well data. A set of general guidelines was developed to relate regional ground-water potential to these more...
Types: Citation; Tags: water well, Clayton Valley, Clark County, ground-water recharge, China Ranch, All tags...
thumbnail
This digital data set defines the boundaries of the deserts of the southwestern United States. Those deserts include the Great Basin, Mojave, Colorado, and Sonoran Deserts as defined by Benson and Darrow (1981). The study by Benson and Darrow (1981) was a historical reference used to support development of the transient ground-water model of Death Valley regional ground-water flow system (DVRFS) completed in 2004 by the USGS (see "Larger Work Citation", Chapter A, page 8, for details).
Types: Citation; Tags: water well, Clayton Valley, Clark County, ground-water recharge, China Ranch, All tags...
thumbnail
This digital data set represents discharge areas in the Death Valley regional ground-water flow system (DVRFS) transient model. Natural ground-water discharge occurs by way of evapotranspiration (ET) and spring flow in the DVRFS model domain, an approximately 45,000 square-kilometer region of southern Nevada and California. Ground water is simulated as discharging from a drain boundary (cell) when the simulated head in the cell rises above a specified drain altitude using the Drain package (Harbaugh and others, 2000). Average annual values of ET and spring discharge (San Juan and others, 2004) were used as observation information during calibration of the DVRFS model (Faunt and others, 2004). The DVRFS transient...
Types: Citation; Tags: drain boundary, California Valley, Saline Valley, MODFLOW-2000, Yucca Mountain, All tags...
thumbnail
Zones in this data set represent spatially contiguous areas that influence ground-water flow in the Death Valley regional ground-water flow system (DVRFS), an approximately 45,000 square-kilometer region of southern Nevada and California. The zones typically represent areas of differing material properties; however, they may also represent spatially similar areas, such as areas of similar infiltration rates. Material properties, such as horizontal hydraulic conductivity, vertical anisotropy, or storage characteristics may vary within a single hydrogeologic unit and be represented by numerous zones; or they may be the same for multiple hydrogeologic units and be represented by a single zone. The DVRFS zones were...
Types: Citation; Tags: California Valley, Saline Valley, MODFLOW-2000, Yucca Mountain, Spring Mountains, All tags...
thumbnail
This digital geospatial data set contains the locations, values, and uncertainties of 700 hydraulic-head observations used in the steady-state, prepumped period of the transient model of the Death Valley regional ground-water flow system (DVRFS), a 100,000-square-kilometer region of southern Nevada and California. Hydraulic-head observations, which are the composite of one or more water-level measurements made at a well, are used to calibrate ground-water flow models. To develop hydraulic-head observations for the DVRFS ground-water flow model, nearly all available water levels for the DVRFS region through 2004 were compiled in Ground-Water Site Inventory (GWSI), the ground-water component of the U.S. Geological...
Types: Citation; Tags: water well, Clayton Valley, MODFLOW-2000, Clark County, China Ranch, All tags...
thumbnail
The contours in this digital data set represent the regional potentiometric surface developed by Bedinger and Harrill (2004) to assess potential interbasin flow in the Death Valley regional ground-water flow system (DVRFS). To obtain an adequate network of control points for that 100,000 square-kilometer region of southern Nevada and California, Bedinger and Harrill (2004) used regional potential altitudes derived from surface-water features, ground-water levels, topographic settings, deep wells, and spring data. A set of general guidelines was developed to relate regional ground-water potential to these more readily observed surface and near-surface ground-water levels and to hydrologic characteristics of ground-water...
Types: Citation; Tags: California Valley, Saline Valley, water well, Yucca Mountain, Spring Mountains, All tags...
thumbnail
This point feature class contains 81,481 points arranged in a 270-meter spaced grid that covers the Spring Mountains and Sheep Range in Clark County, Nevada. Points are attributed with hydroclimate variables and ancillary data compiled to support efforts to characterize ecological zones.
thumbnail
These contours represent the simulated potentiometric surface at the end of simulation (1998) in model layer 16 of the Death Valley regional ground-water flow system (DVRFS), an approximately 45,000 square-kilometer region of southern Nevada and California. The numerical ground-water flow model simulates prepumping conditions before 1913 and transient-flow conditions from 1913 to 1998 after pumping of ground water began. The DVRFS transient ground-water flow model is the most recent in a number of regional-scale models developed by the U.S. Geological Survey (USGS) for the U.S. Department of Energy (DOE) to support investigations at the Nevada Test Site (NTS) and at Yucca Mountain, Nevada (see "Larger Work Citation",...
Types: Citation; Tags: California Valley, Saline Valley, MODFLOW-2000, Yucca Mountain, Spring Mountains, All tags...
thumbnail
These contours represent the simulated potentiometric surface at the end of simulation (1998) in model layer 1 of the Death Valley regional ground-water flow system (DVRFS), an approximately 45,000 square-kilometer region of southern Nevada and California. The numerical ground-water flow model simulates prepumping conditions before 1913 and transient-flow conditions from 1913 to 1998 after pumping of ground water began. The DVRFS transient ground-water flow model is the most recent in a number of regional-scale models developed by the U.S. Geological Survey (USGS) for the U.S. Department of Energy (DOE) to support investigations at the Nevada Test Site (NTS) and at Yucca Mountain, Nevada (see "Larger Work Citation",...
Types: Citation; Tags: California Valley, Saline Valley, MODFLOW-2000, Yucca Mountain, Spring Mountains, All tags...
thumbnail
This digital data set defines the boundary of the ground-water flow model by D'Agnese and others (1997). This steady-state, 3-layer ground-water flow model was developed by the U.S. Geological Survey (USGS) for the U.S. Department of Energy (DOE) to support investigations at Yucca Mountain, Nevada (see "Larger Work Citation", Chapter A, pages 7-8, for details). The model area encompasses approximately 35,000 square-kilometers of southern Nevada and California, or most of the Death Valley regional ground-water flow system (DVRFS) defined by D'Agnese and others (1997). Where possible, the lateral boundary encompassing the model area is a no-flow boundary resulting from physical barriers or hydraulic separation of...
Types: Citation; Tags: water well, Clayton Valley, Clark County, China Ranch, Shoshone, All tags...
thumbnail
This digital data set represents discharge areas in the Death Valley regional ground-water flow system (DVRFS) transient model. Natural ground-water discharge occurs by way of evapotranspiration (ET) and spring flow in the DVRFS model domain, an approximately 45,000 square-kilometer region of southern Nevada and California. Ground water is simulated as discharging from a drain boundary (cell) when the simulated head in the cell rises above a specified drain altitude using the Drain package (Harbaugh and others, 2000). Average annual values of ET and spring discharge (San Juan and others, 2004) were used as observation information during calibration of the DVRFS model (Faunt and others, 2004). The DVRFS transient...
Types: Citation; Tags: drain boundary, Clayton Valley, MODFLOW-2000, Clark County, China Ranch, All tags...
thumbnail
These contours represent the simulated potentiometric surface at the end of simulation (1998) in model layer 16 of the Death Valley regional ground-water flow system (DVRFS), an approximately 45,000 square-kilometer region of southern Nevada and California. The numerical ground-water flow model simulates prepumping conditions before 1913 and transient-flow conditions from 1913 to 1998 after pumping of ground water began. The DVRFS transient ground-water flow model is the most recent in a number of regional-scale models developed by the U.S. Geological Survey (USGS) for the U.S. Department of Energy (DOE) to support investigations at the Nevada Test Site (NTS) and at Yucca Mountain, Nevada (see "Larger Work Citation",...
Types: Citation; Tags: Clayton Valley, MODFLOW-2000, Clark County, China Ranch, Shoshone, All tags...
thumbnail
Recharge in the Death Valley regional ground-water flow system (DVRFS) was estimated from net infiltration simulated by Hevesi and others (2003) using a deterministic mass-balance method. Hevesi and others (2003) estimated potential recharge for the DVRFS, an approximately 100,000 square-kilometer region of southern Nevada and California, using the net-infiltration model, INFILv3. Net infiltration, estimated on a cell-by-cell basis, equaled the sum of snowmelt, precipitation, and infiltrating surface flow minus the sum of evapotranspiration (ET), runoff, and changes in root-zone storage. The net-infiltration model was calibrated to available surface-water flow measurements and constrained by prior estimates of recharge...
Types: Citation; Tags: California Valley, Saline Valley, MODFLOW-2000, Yucca Mountain, Spring Mountains, All tags...
thumbnail
This digital data set represents ground-water discharged from the Death Valley regional ground-water flow system (DVRFS) through pumped wells. Pumping from wells in the transient flow model of the DVRFS is simulated using the Multi-Node Well (MNW) package for MODFLOW-2000 (Halford and Hanson, 2002). In the DVRFS region wells typically are completed with screens that span multiple aquifers and thus multiple layers in the model. The MNW package uses the hydraulic conductivity and thickness to determine how much of the well pumpage is derived from each model layer. Estimated pumpage for the period 1913-98 (San Juan and others, 2004) was simulated as the total pumpage of wells in each model cell. This resulted in 8,569...
Types: Citation; Tags: water well, Clayton Valley, Clark County, China Ranch, Shoshone, All tags...
thumbnail
The false-color composite image of the Death Valley regional ground-water flow system (DVRFS), an approximately 100,000 square-kilometer region of southern Nevada and California, was derived from Landsat 5 Thematic Mapper (TM) data for 1996. The image is a composite of spectral bands 2, 4, and 7 in RGB (Red-Green-Blue) space. Individual bands were processed to display their full dynamic range. The image was further processed in hue-saturation space to emphasize specific geologic features. The image was a base reference for field reconnaissance work and for developing of the DVRFS transient ground-water flow model. The DVRFS flow model is one of the most recent in a number of regional-scale models developed by the...
Types: Citation; Tags: California Valley, Saline Valley, Yucca Mountain, Spring Mountains, Sarcobatus Flat, All tags...
thumbnail
This digital data set defines the lateral boundary of the area simulated by the steady-state ground-water flow model of the Death Valley regional ground-water flow system (DVRFS) by D'Agnese and others (2002). The DVRFS flow model was developed by the U.S. Geological Survey (USGS) for the U.S. Department of Energy (DOE) to support investigations at the Nevada Test Site (NTS) and at Yucca Mountain, Nevada. The model area is an approximately 45,000 square-kilometer region of southern Nevada and California. The model simulates prepumping conditions of the DVRFS and provides starting conditions for the development and calibration of a transient ground-water flow model, (see "Larger Work Citation", Chapter A, page 8,...
Types: Citation; Tags: water well, Clayton Valley, Clark County, ground-water recharge, China Ranch, All tags...


map background search result map search result map Discharge areas for the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California False-color composite of Landsat data for the Death Valley regional ground-water flow system project, Nevada and California Simulated potentiometric surface contours at end of simulation (1998) in model layer 1 of the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Simulated potentiometric surface contours at end of simulation (1998) in model layer 16 of the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Net infiltration of the Death Valley regional ground-water flow system, Nevada and California Regional potentiometric-surface contours by Bedinger and Harrill (2004), for the Death Valley regional ground-water flow system study, Nevada and California Boundary of the southwestern Nevada volcanic field from Laczniak and others (1996), for the Death Valley regional ground-water flow system study, Nevada and California Material-property zones used in the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Boundary of the ground-water flow model by D'Agnese and others (1997), for the Death Valley regional ground-water flow system study, Nevada and California Lateral boundary of the steady-state ground-water flow model by D'Agnese and others (2002), Death Valley regional ground-water flow system, Nevada and California Deserts of the southwestern United States, for the Death Valley regional ground-water flow system study, Nevada and California Discharge areas for the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California Simulated potentiometric surface contours of prepumping conditions in layer 1 of the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Simulated potentiometric surface contours at end of simulation (1998) in model layer 16 of the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Potential structural barriers to ground-water flow, Death Valley regional ground-water flow system, Nevada and California Locations, values, and uncertainties of hydraulic-head observations for the steady-state, prepumped period of the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California Locations, values, and uncertainties of hydraulic-head observations for the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California Pumpage for the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California Topographic reference points in California for the regional ground-water potential map by Bedinger and Harrill (2004), Death Valley regional ground-water flow system, Nevada and California Geospatial Database of Hydroclimate Variables, Spring Mountains and Sheep Range, Clark County, Nevada Geospatial Database of Hydroclimate Variables, Spring Mountains and Sheep Range, Clark County, Nevada Boundary of the southwestern Nevada volcanic field from Laczniak and others (1996), for the Death Valley regional ground-water flow system study, Nevada and California Locations, values, and uncertainties of hydraulic-head observations for the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California Locations, values, and uncertainties of hydraulic-head observations for the steady-state, prepumped period of the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California Boundary of the ground-water flow model by D'Agnese and others (1997), for the Death Valley regional ground-water flow system study, Nevada and California Simulated potentiometric surface contours of prepumping conditions in layer 1 of the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Simulated potentiometric surface contours at end of simulation (1998) in model layer 1 of the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Simulated potentiometric surface contours at end of simulation (1998) in model layer 16 of the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Simulated potentiometric surface contours at end of simulation (1998) in model layer 16 of the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Potential structural barriers to ground-water flow, Death Valley regional ground-water flow system, Nevada and California Lateral boundary of the steady-state ground-water flow model by D'Agnese and others (2002), Death Valley regional ground-water flow system, Nevada and California Discharge areas for the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California Material-property zones used in the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California Discharge areas for the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California Pumpage for the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California Net infiltration of the Death Valley regional ground-water flow system, Nevada and California False-color composite of Landsat data for the Death Valley regional ground-water flow system project, Nevada and California Topographic reference points in California for the regional ground-water potential map by Bedinger and Harrill (2004), Death Valley regional ground-water flow system, Nevada and California Regional potentiometric-surface contours by Bedinger and Harrill (2004), for the Death Valley regional ground-water flow system study, Nevada and California Deserts of the southwestern United States, for the Death Valley regional ground-water flow system study, Nevada and California