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Geospatial datasets were developed to estimate the altitude of the top of bedrock, altitude of the top of the Paradox salt, altitude of the water table in the alluvial aquifer, and the thickness and extent of saturated alluvium in the Paradox Valley in western Colorado. This study was completed by the U.S. Geological Survey (USGS) in cooperation with the Bureau of Reclamation for modeling of brine discharge to the Dolores River (Heywood and others, 2024; Paschke and others, 2024). One point dataset and 11 surfaces (shapefiles or rasters) are published in this data release. The point dataset (Paradox_well_data.zip) contains water-level and geologic data for groundwater, observation, test, and production wells in...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Colorado,
Dolores River,
Montrose County,
Paradox Formation,
Paradox Valley, All tags...
USGS Science Data Catalog (SDC),
Water Resources,
bedrock surface,
brine discharge,
geoscientificInformation,
groundwater model,
saturated alluvium,
water-table surface, Fewer tags
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This data release includes raw and processed (inverted) data for three different geophysical methods, continuous resistivity profiles (CRP), direct current electrical resistivity tomography (ERT), and frequency domain electromagnetic induction (FDEM) data. These surface geophysical methods were used as a proxy for groundwater salinity in the Paradox Valley in western Colorado to investigate temporal and spatial variations in the position of brine-rich groundwater under the Dolores River. Continuous resistivity profile surveys along a 8-10 km reach of the Dolores River were conducted on March 7, May 16, and September 13 of 2017. The ERT surveys were conducted along 3 lines crossing the river and 1 line parallel to...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bedrock, Colorado,
Dolores River,
Montrose County,
Paradox Valley,
USGS Science Data Catalog (SDC), All tags...
brine-rich groundwater,
continuous resistivity profiling,
geophysical survey,
geoscientificInformation, Fewer tags
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For the Western North America Mercury Synthesis, we compiled mercury records from 165 dated sediment cores from 138 natural lakes across western North America. Lake sediments are accepted as faithful recorders of historical mercury accumulation rates, and regional and sub-regional temporal and spatial trends were analyzed with descriptive and inferential statistics. Mercury accumulation rates in sediments have increased, on average, four times (4 ×) from 1850 to 2000 and continue to increase by approximately 0.2 μg/m2 per year. Lakes with the greatest increases were influenced by the Flin Flon smelter, followed by lakes directly affected by mining and wastewater discharges. Of lakes not directly affected by point...
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This data release includes GIS datasets supporting the Colorado Legacy Mine Lands Watershed Delineation and Scoring tool (WaDeS), a web mapping application available at https://geonarrative.usgs.gov/colmlwades/. Water chemistry data were compiled from the U.S. Geological Survey (USGS) National Water Information System (NWIS), U.S. Environmental Protection Agency (EPA) STORET database, and the USGS Central Colorado Assessment Project (CCAP) (Church and others, 2009). The CCAP study area was used for this application. Samples were summarized at each monitoring station and hardness-dependent chronic and acute toxicity thresholds for aquatic life protections under Colorado Regulation No. 31 (CDPHE, 5 CCR 1002-31) for...
Categories: Data;
Tags: "Mineral Resources"],
"Water Quality",
Arapaho National Forest,
Carson National Forest,
Colorado, All tags...
GGGSC,
GIS,
Geology, Geophysics, and Geochemistry Science Center,
Grand Mesa National Forest,
Gunnison National Forest,
MRP,
Medicine Bow National Forest,
Mineral Resource Program,
Pike National Forest,
Rio Grande National Forest,
Routt National Forest,
San Isabel National Forest,
San Juan National Forest,
USGS Science Data Catalog (SDC),
Uncompahgre National Forest,
White River National Forest,
["Geochemistry",
alteration,
elevation,
geoscientificInformation,
geospatial analysis,
geospatial datasets,
mineral deposits,
mineralization,
remote sensing,
surface water quality,
water chemistry,
watershed delineation,
watershed management, Fewer tags
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This data release supports the following publication: Mast, M. A., 2018, Estimating metal concentrations with regression analysis and water-quality surrogates at nine sites on the Animas and San Juan Rivers, Colorado, New Mexico, and Utah: U.S. Geological Survey Scientific Investigations Report 2018-5116. The U.S. Geological Survey (USGS), in cooperation with the U. S. Environmental Protection Agency (EPA), developed site-specific regression models to estimate concentrations of selected metals at nine USGS streamflow-gaging stations along the Animas and San Juan Rivers. Multiple linear-regression models were developed by relating metal concentrations in discrete water-quality samples to continuously monitored streamflow...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Animas River,
Cement Creek,
Colorado,
New Mexico,
San Juan River, All tags...
USGS Science Data Catalog (SDC),
Utah,
Water Quality,
regression modeling,
trace metals,
water-quality, Fewer tags
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