Data

Groundwater recharge potential was mapped using airborne electromagnetic (AEM) survey data collected over the glaciated part of eastern Nebraska. Groundwater recharge potential was mapped by calculating the Vertically integrated connectivity (VIC) for each AEM sounding along 18,000 line-miles of survey data. VIC values were interpolated to produce two versions of groundwater recharge...

This data release contains model inputs and outputs for an investigation of temporal changes of selected Little Arkansas River pesticides by Stone and Klager (2026). Continuous streamflow, specific conductance, and turbidity and discrete atrazine data were collected from two Little Arkansas River study sites (USGS stations 07143672 [L Arkansas R at Hwy 50 NR Halstead, KS] and 07144100 [L...

The U.S. Geological Survey (USGS) Water Availability Impacts of Extreme Events, Building Wildfire Capacity project, which aims to enhance the ability to assess and predict the impacts of wildfires on water supplies, monitored water quality in selected basins in the Western U.S, including California, Colorado, Montana, Oregon, and New Mexico, that were affected by wildfire in 2020–2022...

The U.S. Geological Survey (USGS), in cooperation with the Nebraska Department of Transportation, initiated a flow-frequency study for the Elkhorn River basin in Nebraska for flow data for water years 1881-2022. Estimates of the magnitudes of peak flow were determined using the USGS PeakFQ flood-frequency program, version 7.5.1 at the 50, 20, 10, 4, 2, 1, 0.5, and 0.2 percent chance...

The National Water Quality Network (NWQN) for Rivers and Streams includes 105 sites monitored by the U.S. Geological Survey (USGS) National Water Quality Program (https://www.usgs.gov/mission-areas/water-resources/science/usgs-national-water-quality-network). This data release provides streamflow, nutrient, and sediment data collected and analyzed by USGS for one Mississippi River site...

This data release provides details on a turbidity-derived suspended-sediment concentration (SSC) model for USGS site 06887000, the Big Blue River near Manhattan, Kansas. This includes a model archival summary for SSC, developed to compute 5- to 15-minute, hourly, or daily SSC from July 26, 2018, onward. This model is specific to USGS site 06887000, the Big Blue River near Manhattan...

Note that this data release has been modified from its original version. This data release was originally published as a geodatabase in 2015, and is still available, but the data are considered outdated. In 2025, the following changes were made to the data release: 1. All of the data files were extracted from the original geodatabase as either Tiff or shapefiles. This was completed...

Toxic harmful algal blooms are caused by cyanobacteria and can pose a threat to freshwater ecosystems, including the western basin of Lake Erie. Bloom toxicity can be influenced by variation of biosynthetic repertoires of toxic cyanobacteria but is not well studied beyond microcystins. Water samples collected by the National Oceanic and Atmospheric Administration from July 2016 through...

The U.S. Geological Survey (USGS), in cooperation with the Mississippi Department of Environmental Quality (MDEQ), have developed a high-resolution inset groundwater flow model for the Mississippi River delta as part of an interdisciplinary collaboration, coordinated by the Mississippi Alluvial Plain (MAP) project to provide a tool that stakeholders can use to support water resources...

This U.S. Geological Survey (USGS) data release provides phytoplankton data collected from the Kansas River and tributaries, during July 2012 through June 2023. All data are reported as raw calculated values and are not rounded to USGS significant figures. This data release was produced in compliance with the open data requirements as a way to make scientific products associated with...

Microcystin-LR (MC-LR), a cyanotoxin produced during some harmful algal blooms (HABs), can have negative impacts on water ecosystems. Current treatment methods have potential drawbacks: physical removal can cause cell lysis and toxin release, and chemical treatment can cause disinfection byproducts (DBPs). Ultraviolet C (UV-C) treatment can degrade cyanotoxins without producing...

Coastal communities are uniquely vulnerable to sea-level rise and severe storms such as hurricanes. These events enhance the dispersion and concentration of natural and anthropogenic chemicals and pathogenic microorganisms that could adversely affect the health and resilience of coastal communities and ecosystems in subsequent years. The U.S. Geological Survey has developed the Sediment...