Filters: Tags: San Joaquin Valley (X)21 results (59ms)
Modern groundwater-quality, depth, and well-construction data for selected wells in the San Joaquin Valley, California, 1993-2015
Groundwater-quality data collected between 1993 and 2015 were compiled from the U.S. Geological Survey (USGS) National Water Information System (NWIS) database for 722 wells in the San Joaquin Valley (SJV). Groundwater-quality data retrieved included lab analyses of complete major ion data (calcium, magnesium, sodium, potassium, chloride, sulfate, nitrate, alkalinity, bicarbonate, carbonate, silica, and TDS) for 613 samples, and an additional 109 samples with measured values of specific conductance. Most of these wells were sampled as part of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project or the USGS National Water Quality Assessment (NAWQA) Program. In addition...
Petroleum well data used for preliminary regional groundwater salinity mapping near selected oil fields in central and southern California
This digital dataset is comprised of two separate data files that contain total dissolved solids, well construction, and well identifying information for 1,131 petroleum wells used to map salinity in and around 31 southern and central California oil fields. Salinity mapping was done for 27 fields located in the southern San Joaquin Valley of Kern County (North Belridge, South Belridge, Canfield Ranch, North Coles Levee, South Coles Levee, Cymric, Edison, Elk Hills, Fruitvale, Greeley, Jasmin, Kern Bluff, Kern Front, Kern River, Lost Hills, Mount Poso, Mountain View, Poso Creek, Rio Bravo, Rosedale, Rosedale Ranch, Round Mountain, San Emidio Nose, Tejon, Ten Section, Wheeler Ridge, and Yowlumne), 3 fields in the...
This mapping documents the changes in extent and condition of vernal pool habitat in the Great Valley between 2005 and 2012. "Vernal pool habitat" is defined as vernal pools and the surrounding upland (typically grassland) habitat matrix. The 2005 basemap was created by using double-blind mapping protocol and included 21.4 million acres in and surrounding the Sacramento and San Joaquin valleys (Witham et al 2013). The area included in the 2012 remapping effort focused on the 807,820 acres identified in the 2005 map and areas immediately surrounding the previously mapped polygons. Special attention was paid to areas where habitat was being created through mitigation banking. The result of the 2012 remapping shows...
Mendenhall and others (1916) published depth-to-water data compiled in 1910 for all known wells in the San Joaquin Valley, California. Data for the 3,429 wells having depth-to-water of greater than zero feet were used to construct an interpolated depth-to-water surface for the entire SJV. This map represents groundwater levels in approximately 1910, prior to extensive development of the groundwater system. A depth-to-water contour map with contour lines of 5, 10, 15, and 25 meters below land surface was then drawn from this raster surface.
Saline Soils with at least slightly saline conditions. Based on SSURGO data.
Hardwood forests of the San Joaquin Valley and surroundings
Water well data used for preliminary regional groundwater salinity mapping near selected oil fields in central and southern California
This digital dataset is comprised of three separate data files that contain total dissolved solids, well construction, and well identifying information for 3,546 water wells used to map salinity in and around 31 southern and central California oil fields. Salinity mapping was done for 27 fields located in the southern San Joaquin Valley of Kern County (North Belridge, South Belridge, Canfield Ranch, North Coles Levee, South Coles Levee, Cymric, Edison, Elk Hills, Fruitvale, Greely, Jasmin, Kern Bluff, Kern Front, Kern River, Lost Hills, Mount Poso, Mountain View, Poso Creek, Rio Bravo, Rosedale, Rosedale Ranch, Round Mountain, San Emidio Nose, Tejon, Ten Section, Wheeler Ridge, and Yowlumne), 3 fields in the LA...
Microsatellite data formatted for the software CONVERT, which includes dataset numerical IDs, sampling site names, and locus identifiers. Rows 291-294 provides information about the allele size ranges and repeat motif for each locus. Missing data are coded as ?.
Individually displayed land use classes from the 2010 Farmland Mapping and Monitoring Program dataset.
Historic groundwater-quality, depth, and well-construction data for wells in the San Joaquin Valley, California, 1910
Mendenhall and others (1916) assessed groundwater resources in California's San Joaquin Valley in 1910 to estimate the availability of groundwater of suitable quality for agricultural, industrial, and drinking water supplies. They inventoried nearly all existing wells, compiled depth-to-water at 4,002 wells, and collected water-quality data at 485 wells. Samples were collected from 114 wells for laboratory analysis of total dissolved solids (TDS), chloride, sulfate, bicarbonate, carbonate, calcium, magnesium, sodium+potassium, and silica (Mendenhall and others. 1916; Dole, 1909). Field assays were used to measure TDS, chloride, sulfate, bicarbonate, carbonate, and total hardness in samples from 371 wells (Mendenhall...
Microsatellite STRUCTURE input file that corresponds with the samples in the ‘refSampleLoc’ worksheet. Missing data are coded as -999.
San Joaquin Valley Vernal Pool Complexes
Groundwater Rechargeable Soils based on NRCS soil data
Produced water chemistry data for samples from four petroleum wells, Southern San Joaquin Valley, California, 2014
The U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board collected produced water samples from four petroleum wells in the southern San Joaquin Valley on November 5, 2014. This digital dataset contains the site information, analyzing laboratories and methods, and water chemistry and quality control results for these samples. Water chemistry results include concentrations of dissolved hydrocarbon gases and their isotopic composition; concentrations of inorganic constituents including salinity, major ions, and nutrients; dissolved organic carbon; and stable isotopes of water and strontium dissolved in water. Samples were analyzed by 5 laboratories operated or contracted...
Caption from Figure 23: Observed land subsidence of approximately 29 ft at a surveying benchmark, 10 mi southwest of Mendota in the San Joaquin Valley, California (from Ireland and others, 1984). Note: Dr. Joseph Fairfield Poland pictured next to pole. Published as Figure 23 in the U.S. Geological Survey Circular 1099, Regional Aquifer-System Analysis Program of the U.S. Geological Survey, 1978-1992. 1994. Also available online at: http://water.usgs.gov/edu/gallery/landsubsidence-poland.html http://water.usgs.gov/edu/earthgwlandsubside.html http://ca.water.usgs.gov/land_subsidence/
Location information regarding samples taken for each individual.
Location information regarding samples taken for each individual. This data sheet is to be used in conjunction with the 'Convert' file.
Data release for persistence of historical population structure in an endangered species despite near-complete biome conversion in California’s San Joaquin Desert
The recency of large-scale land conversion in California’s San Joaquin Desert raises the probability that the region’s numerous endemic species still retain genetic signatures of historical population connectivity. If so, genomic data can serve as a guidance tool for conserving lands that once supported habitat for gene movement. We studied the genetic structuring of the endangered blunt-nosed leopard lizard Gambelia sila, a San Joaquin Desert endemic, to (1) test whether patterns of population admixture could be used to delimit former habitat corridors in the pre-converted landscape, (2) evaluate whether restriction site associated DNA sequencing (RADseq) from a subset of samples can resolve structure at the same...