Maryland
Ocean Resources for America's Needs
Our scientists conduct research studies focused on geologic mapping, sampling and understanding of mineral and energy resources and studies of the geologic setting and processes to inform renewable energy development offshore.
Coastal and Marine Ecosystem Science
We bring together multidisciplinary expertise focused on developing tools and models to improve understanding of how healthy ecosystems function as well as how they respond to environmental changes and human impacts including ecosystem restoration. Research studies address coral reef, coastal wetland, benthic habitat and groundwater resources.
Hurricane Sandy
Over 160 of our scientists, technicians, and specialists responded to Hurricane Sandy by deploying field equipment and capturing information both before and after the storm. Our Sandy Science Plan identifies major research themes that will guide research to continue the support of the recovery activities.
Chesapeake Bay Water-Quality Loads and Trends
Explore resources here describing water-quality load and trend results for nontidal rivers of the Chesapeake Bay watershed.
The health of the Chesapeake Bay is largely driven by changes in streamflow and the amount of pollution it contains. Runoff in the Chesapeake Bay watershed carries pollutants, such as nutrients and sediments, to rivers and streams that...
USGS Enhances Statistical Techniques to Assess Water-Quality Trends
The USGS has completed more enhancements to our innovative technique to assess water-quality trends. The WRTDS (Weighted Regressions on Time Discharge and Season) method was first published in 2010 as an exploratory data analysis technique for understanding trends in surface water. Subsequently, we published the EGRET (Exploration and Graphics for RivEr Trends) software which implements the...
USGS leads STAC report on Land Management Effects on Water-Quality Status and Trends
The Chesapeake Bay is a degraded eutrophic ecosystem with periodic hypoxia and anoxia, algal blooms, diminished submerged aquatic vegetation, and depleted stocks of finfish, crabs, and oysters (Kemp et al. 2005). Since 1983, the seven jurisdictions within the Chesapeake Bay watershed (Delaware, Maryland, New York, Pennsylvania, Virginia, West Virginia, and the District of Columbia) have...
USGS works with USDA and State Jurisdictions to Enhance Reporting of Agricultural Conservation Practices that Reduce Loss of Nutrients and Sediment in the Chesapeake Bay Watershed
The Chesapeake Bay Program (CBP) is working to enhance reporting of agricultural conservation practices being implemented to reduce the loss of nutrients and sediment from the watershed to Chesapeake Bay. Each year, the six State jurisdictions within the Chesapeake Bay watershed are required to report progress in conservation implementation to the CBP partnership at its Annual Progress Review...
USGS Works with Partners to Study and Summarize Health of Yellow Perch
The USGS works with U.S. Fish & Wildlife Service and Maryland Department of Natural Resources to summarize the effects of suburban lands and contaminants on the health of yellow perch in the Chesapeake Bay.
EPA, USGS, with USFWS Release New Report on the Extent and Severity of Toxic Contaminants in the Chesapeake Bay and its Watershed
Report summarizing existing information on the extent and severity of the occurrence of toxic contaminants in the Chesapeake Bay and its watershed.
Determining Nutrient and Sediment Loads and Trends in the Chesapeake Bay Watershed by Using An Enhanced Statistical Technique
As the largest and most productive estuary in North America, Chesapeake Bay is a vital ecological and economic resource. In recent decades, however, the bay and its tributaries have been degraded by excessive inputs of nutrients (nitrogen and phosphorus) and sediment from contributing watersheds, and in 1998, the Chesapeake Bay and its tidal tributaries were listed as “impaired” under the...
USGS summarizes information about the Chesapeake Bay and implications for ecosystem management (USGS Circular 1316)
The USGS released the Circular 1316: “Synthesis of U.S. Geological Survey Science for the Chesapeake Bay Ecosystem and Implications for Environmental Management”
Bacteriological quality of groundwater used for household supply
In fractured bedrock aquifers used for domestic supply conditions can exist where contaminants such as bacteria are not filtered out by the soil. Once in the fracture system, little additional filtration takes place.
The results of a synotic sampling of domestic wells in the Lower Susquehanna River basin, Pennsylvania and Maryland, showed that bacteria concentrations were higher in...