Sandra Eberts (Former Employee)
Science and Products
USGS National Streamgaging Network
As of October 2024, the USGS Groundwater and Streamflow Information Program supports the collection and (or) delivery of both streamflow and water-level information at 8,705 sites and water-level information alone at 3,460 additional sites. The data are served online—most in near real-time—to meet many diverse needs including the protection of life, property, the environment, and our economy.
USGS Streamgages By the Numbers
Get the facts and figures about the USGS Streamgaging Network, one of the largest streamgaging enterprises in the world!
Web-Based Tool Developed through Multiagency Effort Allows Visualization of Cyanobacteria Blooms in Lakes and Reservoirs—Steps Toward Public Awareness and Exposure Prevention
A web-based application tool utilizing satellite data—CyANWeb—developed through collaborative interagency efforts was released as part of the Cyanobacteria Assessment Network (CyAN) to help Federal, State, Tribal, and local partners identify when cyanobacterial blooms may be forming. Available through a web browser or as an application, the tool can access, download, and provide data to notify...
Improving representation of groundwater in foundational Great Lakes hydrologic and hydrodynamic models and data sets
Groundwater plays a critical role in the water balance, however the groundwater component of the hydrologic cycle is frequently overlooked at basin scales because it is difficult to observe and quantify. We address this problem through a novel framework that combines existing hydrological models and data sets with groundwater flux estimates across Earth's largest system of lakes; the...
National Water-Quality Assessment (NAWQA)
Our surface water, groundwater, and aquatic ecosystems are priceless resources, used by people across the Nation for drinking, irrigation, industry, and recreation. The National Water-Quality Assessment (NAWQA) Project is a leading source of scientific data and knowledge for development of science-based policies and management strategies to improve and protect our water resources.
Factors Affecting Vulnerability of Public-Supply Wells to Contamination
More than 100 million people in the United States—about 35 percent of the population—receive their drinking water from public-supply wells. These systems can be vulnerable to contamination from naturally occurring constituents, such as radon, uranium and arsenic, and from commonly used manmade chemicals, such as fertilizers, pesticides, solvents, and gasoline hydrocarbons. Learn about the...
Public-Supply Well Pumping Regimes Influence Quality of Water Produced
U.S. Geological Survey (USGS) scientists studying the vulnerability of public-supply wells to contamination have identified ways in which the seasonal operation of public-supply wells can affect the quality of water that they produce. By incorporating historical water-quality data into models of fluid flow, USGS scientists were able to estimate the amount of contaminated groundwater reaching a...
Science and Products
USGS National Streamgaging Network
As of October 2024, the USGS Groundwater and Streamflow Information Program supports the collection and (or) delivery of both streamflow and water-level information at 8,705 sites and water-level information alone at 3,460 additional sites. The data are served online—most in near real-time—to meet many diverse needs including the protection of life, property, the environment, and our economy.
USGS Streamgages By the Numbers
Get the facts and figures about the USGS Streamgaging Network, one of the largest streamgaging enterprises in the world!
Web-Based Tool Developed through Multiagency Effort Allows Visualization of Cyanobacteria Blooms in Lakes and Reservoirs—Steps Toward Public Awareness and Exposure Prevention
A web-based application tool utilizing satellite data—CyANWeb—developed through collaborative interagency efforts was released as part of the Cyanobacteria Assessment Network (CyAN) to help Federal, State, Tribal, and local partners identify when cyanobacterial blooms may be forming. Available through a web browser or as an application, the tool can access, download, and provide data to notify...
Improving representation of groundwater in foundational Great Lakes hydrologic and hydrodynamic models and data sets
Groundwater plays a critical role in the water balance, however the groundwater component of the hydrologic cycle is frequently overlooked at basin scales because it is difficult to observe and quantify. We address this problem through a novel framework that combines existing hydrological models and data sets with groundwater flux estimates across Earth's largest system of lakes; the...
National Water-Quality Assessment (NAWQA)
Our surface water, groundwater, and aquatic ecosystems are priceless resources, used by people across the Nation for drinking, irrigation, industry, and recreation. The National Water-Quality Assessment (NAWQA) Project is a leading source of scientific data and knowledge for development of science-based policies and management strategies to improve and protect our water resources.
Factors Affecting Vulnerability of Public-Supply Wells to Contamination
More than 100 million people in the United States—about 35 percent of the population—receive their drinking water from public-supply wells. These systems can be vulnerable to contamination from naturally occurring constituents, such as radon, uranium and arsenic, and from commonly used manmade chemicals, such as fertilizers, pesticides, solvents, and gasoline hydrocarbons. Learn about the...
Public-Supply Well Pumping Regimes Influence Quality of Water Produced
U.S. Geological Survey (USGS) scientists studying the vulnerability of public-supply wells to contamination have identified ways in which the seasonal operation of public-supply wells can affect the quality of water that they produce. By incorporating historical water-quality data into models of fluid flow, USGS scientists were able to estimate the amount of contaminated groundwater reaching a...