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Filter Total Items: 95
Flowing groundwater site in Indiana
Date Published: August 30, 2017
Status: Active

MD-DE-DC WSC Groundwater Studies Team

The U.S. Geological Survey provides unbiased, timely, and relevant information, studies, and data about groundwater resources of the Nation. The USGS monitors groundwater levels in thousands of wells across the U.S.  Hundreds of these wells are located in MAryland, Delaware, and the District of Columbia.  The MD-DE-DC Water Science Center logs data on approximately 370 groundwater wells...

Severn River, Annapolis, Maryland, a tributary to Chesapeake Bay, showing high sediment
Date Published: May 12, 2017
Status: Active

Climate Change in the Chesapeake Bay Watershed: Effects on Riverine Discharge, Ecosystems, and Water Quality

The 64,000-square mile watershed that drains to the Chesapeake Bay is highly populated and has diverse land use, including forested, agricultural, and urbanized areas. Increased precipitation in the eastern United States over the last 100 years has affected stream flow and thus the loading of pollutants delivered to the bay. Such pollutants as suspended sediment and dissolved phosphorus and...

Contacts: Karen C Rice
East down the Susquehanna River
Date Published: April 27, 2017
Status: Active

Summary of Nutrient and Sediment Loads and Trends in the Cheseapeake Watershed

Changes in nitrogen, phosphorus, and suspended-sediment loads in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal Water-Quality Monitoring Network (NTN). These results are used to help assess efforts to decrease nutrient and sediment loads being delivered to the bay. Additional information for each monitoring station is...

Image shows a map of the Chesapeake Bay watershed.
Date Published: April 27, 2017
Status: Completed

Load and Trends Results Through Water Year 2015

Changes in nitrogen, phosphorus, and suspended-sediment loads in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the nine Chesapeake Bay River Input Monitoring (RIM) stations.  

Halictus ligatus
Date Published: March 20, 2017
Status: Active

DNA Barcoding for Identifying Native Bee Species

The Challenge: Traditionally, bee identification has relied on taxonomic methods centered on descriptions of morphological differences between species. However, for many species, separate keys are required for identifying adult males and females and immature life stages. These keys are commonly unavailable. The lack of distinguishing morphological characters useful for separating closely...

Dye deposition in yolk over time
Date Published: March 17, 2017
Status: Completed

Assessing Toxicogenomics Effects of a Synthetic Androgen on Japanese Quail and the Development of an Avian Vitellogenesis Model

The Challenge: Endocrine active chemicals (EAC) are known to interfere with hormonally regulated physiological processes, thereby affecting signaling in the hypothalamic-pituitary-gonadal-liver (HPGL) axis and commonly resulting in reproductive dysfunction. Computational models that relate hormonal and genomic biomarkers within the HPGL axis to the reproductive cycle and ecologically relevant...

Subadult Japanese quail
Date Published: March 16, 2017
Status: Completed

The Role of Japanese Quail in Ecotoxicology

The Challenge: Wild birds are exposed throughout their lives to natural and synthetic chemicals that are present in the environment, many of which interfere with the animal’s physiological and developmental systems. Relative concentrations, routes, frequency, and the environment in which chemical exposure occurs will determine to a large extent the bird’s response. Well-designed avian field...

Laughing gull (Larus atricilla)
Date Published: March 15, 2017
Status: Active

Identifying the Genetic Basis of Avian Susceptibility to Mercury

The Challenge: Mercury is a highly toxic element found throughout our environment. Although it occurs naturally in some environments, human industrial pollution has greatly increased the amount of mercury and the range of environments in which mercury is found. Recent studies have confirmed clear differences in the sensitivity of various bird species to methylmercury. Because the causes of...

Avian egg injection
Date Published: March 13, 2017
Status: Completed

Assessing Adverse Outcomes Associated with Exposure of Birds to Flame Retardants

The Challenge: The use of flame retardants (FRs) as additives in a variety of consumer use products, including plastics, textiles, and electronics, is projected to continue and increase for the foreseeable future. Because of unanticipated environmental problems, some FRs have either been banned, restricted, or are being phased-out and replaced by other new and presumably safer FRs. Regrettably...

Point of Rocks, Potomac River, MD
Date Published: March 2, 2017
Status: Active

Northeast Region Capability Teams

The USGS Northeast Region (NER) began a process of integrating its scientific expertise and technical staff around issues of societal concern. These Regional Capability Teams (CTs) are intended to encourage interdisciplinary scientist-to- scientist collaboration and communication across the NER’s 11 Science Centers and promote the use of best methods on specific science focus areas to produce...

An adult female surf scoter resting in the water
Date Published: February 16, 2017

Seabird Research Program

The Seabird Research Program at PWRC is focused on studying the ecology of species present across the Atlantic Coast. This program was a natural progression of PWRC's historic work studying the coastal ecology of wildlife in and around the Chesapeake Bay. We now focus on the three key areas on a variety of species: physiology, avoided bycatch, and movement ecology.

USGS staff working in Chesapeake Bay Watershed
Date Published: January 24, 2017
Status: Active

USGS contributes to new STAC report on designing sustainable coastal habitats

The purpose of the Designing Sustainable Coastal Habitats workshop and the approach the workshop steering committee used to bring together scientists, habitat restoration partners, and policy makers to address three goals.  The three workshop goals or themes were to:  

1. Assess the current status and trending condition of coastal ecosystems in the Chesapeake Bay watershed; 


The "Best Report" for 2014 is "Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas, Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2009-12"

Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas
Filter Total Items: 198
June 25, 2014

On the one-year anniversary of President Obama’s Climate Action Plan, Secretary of the Interior Sally Jewell today released a new report showing that forests, wetlands and farms in the eastern United States naturally store 300 million tons of carbon a year (1,100 million tons of CO2 equivalent).

2014 US Topo map of the Keedysville, Maryland area.
May 22, 2014

US Topo maps now have a crisper, cleaner design - enhancing readability of maps for online and printed use. Map symbols are easier to read over the digital aerial photograph layer whether the imagery is turned on or off.

Lidar image showing the upper parts of the landslide that occurred in northwest Washington on March 22, 2014.
May 14, 2014

Want to know how elevation will benefit your state? The USGS National Geospatial Program is advancing the 3D Elevation Program, known as 3DEP, in response to the growing need for high-quality three-dimensional representations of the Nation’s natural and constructed features.

April 9, 2014

Oyster aquaculture in the Potomac River estuary could result in significant improvements to water quality, according to a new NOAA and U.S. Geological Survey study published in the journal Aquatic Geochemistry.

August 13, 2013

A virus that can cause disease in largemouth bass has now been identified in otherwise apparently healthy northern snakeheads taken from two Potomac River tributaries in Virginia, the U.S. Geological Survey announced today. 

January 25, 2013

The construction and subsequent use of the Pearce Creek Dredge Material Containment Area – combined with pre-existing natural conditions – has degraded the quality of groundwater close to the facility, according to a recent U.S. Geological Survey study.

December 4, 2012

Reston, Va. – Offshore wind energy development and migratory birds is the topic of a free public lecture Wednesday, December 5, at 7 p.m. at the U.S. Geological Survey National Center in Reston, Va. 


October 15, 2012

Reston, Va.—Are you prepared for future earthquakes? Earthquake experts from the USGS and FEMA will be with students at Langston Hughes Middle School as they participate in the Great ShakeOut earthquake drill on October 18, 2012.

September 24, 2012

Imagine if doctors had time to stop delicate procedures before an earthquake. And if emergency responders had a few extra moments to gear up, airplane landings could be postponed, trains slowed, and people could move to safer locations. Come learn how the USGS and its partners are helping provide critical seconds of notification through an earthquake early warning system in the United States.

June 20, 2012

Using a geology-based assessment method, the U.S. Geological Survey estimated a mean undiscovered natural gas resource of 3.9 trillion cubic feet and a mean undiscovered natural gas liquids resource of 135 million barrels in continuous accumulations within five East Coast Mesozoic basins, according to a new USGS report.  

June 4, 2012

RESTON, Va.— Mount Katmai's 1912 eruption in Alaska, which was 30 times larger than the eruption of Mt. St. Helens in 1980, is the topic of a free public lecture Wednesday, June 6, at 7:00 p.m. at the U.S. Geological Survey National Center in Reston, Va. 

Maryland - Delaware - Washington D.C. Water Science Center

Maryland -  Delaware - Washington D.C. Water Science Center

5522 Research Park Drive
Catonsville, MD 21228

Phone: 443-498-5500
Fax: 442-498-5510

MD-DE-DC Water

Patuxent Wildlife Research Center

Patuxent Wildlife Research Center

12100 Beech Forest Road
Laurel, MD 20708-4039

Phone: 301-497-5000

Patuxent Research