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Data Analysis Tools

Data Analysis Tools include models and other specific data analyses.

Filter Total Items: 180

Denitrification Only Removes Minor Amounts of Nitrate in Eastern San Joaquin Valley Groundwater

Nitrate is a major concern to water-resource managers in the eastern San Joaquin Valley, and there are extensive regulatory programs in place that seek to reduce nonpoint-source loading and eventually reduce concentrations in groundwater. 

Nothing Happens Right Away—Predicting Decreases in Nitrate Concentrations After Zero Loading is Achieved

This focuses on how we use groundwater age to predict changes in nitrate concentrations over time. Typically, deep public supply wells draw from deeper parts of the aquifer where water is decades, centuries, or even millenia old.

Irrigation Causes Naturally Occurring Uranium to Dissolve into Groundwater in the Eastern San Joaquin Valley

The USGS first identified uranium as a potential issue in California's groundwater during studies conducted in the Modesto area funded by the USGS National Water Quality Assessment Program. Subsequently, the GAMA program undertook a broader analysis of uranium concentrations across the State.

Trends in Arsenic Concentrations in the San Joaquin Valley

Arsenic is known to be a problem in groundwater used for drinking water supplies in the San Joaquin Valley. About 10% of the are of groundwater resources used for public supply contain more than the USEPA MCL of 10 µg/L. Most public-supply and domestic wells currently yield groundwater with arsenic levels below 3 µg/L and do not exhibit trends in concentration.

Geonarrative: Water-Use Data-Gap Analysis

This water-use data-gap analysis analyzed the differences between the current state of the Nation's water-use data and the data needed to achieve the long-term goals of the USGS Water Availability and Use Science Program.

Natural Gas Compositional Analyses Dataset of Gases from United States Wells - Viewer

The purpose of this database is to provide a publicly available and spatially referenced national dataset of natural gas geochemistry.

North American Breeding Bird Survey Results and Analysis

This website provides visualizations of population change for North American birds using data from the North American Breeding Bird Survey (BBS). The BBS is analyzed for a "core" area (contiguous United States and southern Canada, results available from 1966-present), and for an "expanded" survey area (including portions of Alaska and northern Canada with results from 1993-present).

USGS Gulf Coast Source Rock Database (GCSRD)

The database is designed to be a convenient resource for any member of the public to easily access source rock data from across the Gulf Coast region, circumventing the need for extensive, time-consuming literature searches.

Spectral Characteristics Viewer

The Spectral Characteristics Viewer allows users to determine which satellite bands are best suited for research applications. 

United States Documented Unplugged Orphaned Oil and Gas Well (DOW) Dataset Viewer

The dataset was created to provide documented orphaned well data to decision makers, as well as researchers, and other interested parties in a publicly available online format.

Amphibian and Reptile Species Distribution Explorer

The Amphibian and Reptile Species Distribution Explorer provides information about herptile distributions and species richness in an easy-to-understand and accessible format for scientists and natural resource managers, interested landowners, citizen scientists, and anyone interested in amphibians and reptiles.

Interactive Supplement - When and How Often do Seedings Experience a Wildfire?

Interactive Tableau supplement to the paper “Protecting Restoration Investments from the Cheatgrass-fire Cycle in Sagebrush Steppe.”