Data Analysis Tools
Data Analysis Tools include models and other specific data analyses.
BatTool
The BatTool R package provides functions implementing a demographic matrix model with associated Shiny graphical user interface.
REmote Aquatic Chlorophyll-a Tracker (REACT)
This tool shows the presence of aquatic chlorophyll-a in select waterbodies. Note: This tool indicates the presence of aquatic chlorophyll-a and should not be used to determine if a toxic cyanobacterial bloom (harmful algal bloom) is present.
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.