Unified Interior Regions

Delaware

Located in the northeastern portion of the Delmarva Peninsula of the United States, Delaware is divided into three counties and is on a level plain, with the lowest mean elevation of any state in the nation with its highest elevation not rising fully 450 feet above sea level. An 80 foot ridge extends along the western boundary of the state separating watersheds that feed Delaware River and Bay.

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

States L2 Landing Page Tabs

Located in the northeastern portion of the Delmarva Peninsula of the United States, Delaware is divided into three counties and is on a level plain, with the lowest mean elevation of any state in the nation with its highest elevation not rising fully 450 feet above sea level. An 80 foot ridge extends along the western boundary of the state separating watersheds that feed Delaware River and Bay.

News

Date published: July 21, 2020

Assessment of Mercury Bioaccumulation in US National Parks Using Citizen Science

A team of federal, academic, and NGO researchers conducted a national-scale assessment of mercury bioaccumulation in aquatic ecosystems using dragonfly larvae as biosentinels.

Date published: July 1, 2020

MD-DE-DC WSC Capabilities Sites

There's a lot of talent at the Maryland, Delaware, Washington, DC Water Science Center!

We’ve created a series of websites, thematically named to characterize our work as our “Capabilities”, working interdependently with a diverse array of cooperative partners, the scientists, technicians, and support staff work tirelessly to produce the high-quality output for which...

Filter Total Items: 48
Date published: August 25, 2020
Status: Active

MD-DE-DC Sample for Topic Page

This is a sample page to test for "TOPIC" type

Date published: June 28, 2020
Status: Active

MD-DE-DC WSC Water Use & Water Supply Capabilities

In Maryland, public supply water is delivered to users for domestic, commercial, and industrial purposes. Most is used for public services, such as public pools, parks, firefighting, water and wastewater treatment, and municipal buildings, and some is unaccounted for because of leaks, flushing, tower maintenance, and other system losses. 5.7 million Marylanders get their water from the public...

Date published: June 27, 2020
Status: Active

MD-DE-DC WSC Geomorphology and Sediment Studies Capabilities

Geomorphology is classified as the study of the origin and evolution of topographic and bathymetric features created by physical, chemical or biological processes operating at or near the Earth's surface. Adding water creates a whole new dynamic known as Fluvial Morphology. Rivers and streams act as conduits of water along with sediment. As water flows over the channel bed, it is able to...

Date published: June 26, 2020
Status: Active

MD-DE-DC WSC Modeling Capabilities

USGS models are widely used to predict responses of hydrologic systems to changing stresses, such as increases in precipitation or ground-water pumping rates, as well as to predict the fate and movement of solutes and contaminants in water.

The USGS is at the forefront of devising new techniques and computer software to solve practical problems in the study of water resources....

Date published: June 23, 2020
Status: Active

MD-DE-DC WSC Laboratory Capabilities

The labs at the MD-DE-DC WSC are clean, well-stocked, and appointed with modern equipment and a highly talented staff.  The three labs analyze samples, conduct controlled-environment chemical tests with GCMS in the Water Qualty lab. Scientists and technicians work with core samples and analyze soils in the Sediment Lab.

Our labs assure reliability, reproducibility, and high quality of...

Date published: June 22, 2020
Status: Active

MD-DE-DC Coding and Statistical Data Capabilities

This site is dedicated to Coding and Statistical Data that is produced and analyzed by scientists at the MD-DE-DC WSC. We use many tools at the USGS including software exclusively developed for, sometimes written by the USGS. 

Date published: June 12, 2020
Status: Active

MD-DE-DC WSC Water Quality Capabilities

Water quality is a measure of the suitability of water for a particular use based on selected physical, chemical, and biological characteristics. Water-quality monitoring is used to help water-resource managers understand and avert potential negative effects of man-made and natural stresses on water resources, evaluate trends, and compare to water-quality criteria.

One of our primary...

Date published: May 15, 2020
Status: Active

MD-DE-DC WSC Surface Water Capabilities

As an integrated part of the WSC, the Surface Water Team monitors and conducts investigative research to describe and improve our region's understanding of extreme hydrologic events - droughts, floods and flood hazards, and coastal or bay storm surge and inundation. They also facilitate measurement stream stages, streamflow, and computes daily streamflow at locations in Maryland, Delaware, and...

Date published: April 17, 2020
Status: Active

The Response of Coastal Wetlands to Sea-level Rise: Understanding how Macroscale Drivers Influence Local Processes and Feedbacks

The purpose of this work is to advance our understanding of how coastal wetland responses to sea-level rise (SLR) within the conterminous United States are likely to vary as a function of local, regional, and macroscale drivers, including climate. Based on our interactions with managers and decision makers, as well as our knowledge of the current state of the science, we propose to: (a)...

Date published: September 4, 2019
Status: Active

Real-Time Storm Response

Coastal change forecasts and pre- and post-storm photos documenting coastal change for landfalling storms. Currently responding to Hurricane Dorian.

Contacts: Kara Doran
Date published: June 26, 2019
Status: Active

Information by Region- Delaware

  

Filter Total Items: 22
Date published: August 28, 2020

Daily-timestep and monthly-timestep estimates of baseflow at 49 reference stream gages located within 25 miles of the Delaware River basin watershed boundary for the years 1950 through 2015

This USGS data release contains daily-timestep and monthly-timestep estimates of baseflow at 49 reference stream gages located within 25 miles of the Delaware River basin watershed boundary. Estimates are provided for the available period of record of streamflow data at each site between 1950 and 2015. A two-parameter recursive digital filter was used to estimate baseflow at the selected...

Date published: July 27, 2020

Loads and trends in the Chesapeake Bay nontidal monitoring network: results through Water Year 2018

The U.S. Geological Survey (USGS) has developed the nontidal network mapper to share the short-term (2009-2018) water-year nutrient and suspended-sediment load and trend results for the Chesapeake Bay Program’s (CBP) non-tidal network (NTN). The mapper provides the primary findings for nitrogen, phosphorus and suspended-sediment trends, and gives the user tools to further examine the results...

Date published: April 23, 2020

Domestic Wells in the United States

Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater. 

Date published: August 28, 2018

USGS Domestic Continuous (Unconventional) Oil & Gas Assessments, 2000-Present

Interactively explore assessment summary information for continuous (unconventional) assessments conducted at the USGS from 2000-2018. The assessment results data used to generate this visualization can be downloaded here in Excel Format.  These data represent all assessment results...

Date published: January 19, 2018

Oblique Aerial Photography Viewer

Obique photos offer a unique perspective of the coast. Features such as beach erosion or accretion, dune erosion and overwash can all be clearly characterized in this imagery. It also documents coastal infrastructure, as well as the damage that infrastructure may incur as the result of an impacting hurricane. 

Date published: October 19, 2017

Pharmaceuticals in water, fish, and ospreys nesting in Delaware River and Bay

Exposure of wildlife to Active Pharmaceutical Ingredients (APIs) is likely to occur but evidence of hazard and risk is limited. One exposure pathway that has received attention is trophic transfer of APIs in a water-fish-osprey food chain. 

Date published: September 1, 2017

National Water Information System web interface (NWISweb)

The National Water Information System (NWIS) web application provides access to real-time and historical surface-water, groundwater, water-quality, and water-use data collected at approximately 1.5 million sites across all 50 states.

Date published: August 24, 2017

Coastal Change Hazards Portal

Interactive access to coastal change science and data for our Nation’s coasts. Information and products are organized within three coastal change hazard themes: 1) extreme storms, 2) shoreline change, and 3) sea-level rise. Displays probabilities of coastal erosion.

Date published: September 29, 2016

Surface-Water Data for Delaware

Real-time, daily, peak-flow, field measurements, and statistics of current and historical data that describe stream levels, streamflow (discharge), reservoir and lake levels, surface-water quality, and rainfall in Maryland. 

Filter Total Items: 6
Floodplain Ecosystem Service Mapper
September 10, 2020

Healthy floodplains and wetlands provide critical ecosystem services to local and downstream communities by retaining sediments, nutrients, and floodwaters. Land conversion and degradation diminish floodplain functionality and services.

Black and grey map of the contiguous 48 states shaded by the number of people using domestic wells per square kilometer (2010)
April 23, 2020

Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater. 

Digital Elevation Model in the Atchafalaya Basin, LA
April 19, 2016

The 3DEP products and services available through The National Map consist of standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

USGS Storm-Tide Mapper and Data Services
March 8, 2016

The USGS Storm Tide Mapper is a tool for viewing, analyzing, and accessing storm tide data collected during and after hurricanes and Nor’easters. The USGS Storm Tide Mapper will continue to provide a unified and consistent source of real-time and archived storm-tide data.

Filter Total Items: 27
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Year Published: 2020

Hurricane Sandy effects on coastal marsh elevation change

High-magnitude storm events such as Hurricane Sandy are powerful agents of geomorphic change in coastal marshes, potentially altering their surface elevation trajectories. But how do a storm’s impacts vary across a large region spanning a variety of wetland settings and storm exposures and intensities. We determined the short-term impacts of...

Yeates, Alice G.; Grace, James; Olker, Jennifer H.; Guntenspergen, Glenn R.; Cahoon, Donald; Adamowicz, Susan C.; Anisfeld, Shimon C.; Barrett, Nels; Benzecry, Alice; Blum, Linda K.; Christian, Rober T; Grzyb, Joseph; Kracauer Hartig, Ellen; Hines Leo, Kelly; Lerberg, Scott; Lynch, James C.; Maher, Nicole; Megonigal, J Patrick; Reay, William G.; Siok, Drexel; Starke, Adam; Turner, Vincent; Warren, Scott

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Year Published: 2020

Report of the River Master of the Delaware River for the period December 1, 2010–November 30, 2011

A Decree of the Supreme Court of the United States, entered June 7, 1954, established the position of Delaware River Master within the U.S. Geological Survey. In addition, the Decree authorizes diversion of water from the Delaware River Basin and requires compensating releases from certain reservoirs, owned by New York City, to be made under the...

DiFrenna, Vincent J.; Andrews, William J.; Russell, Kendra L.; Norris, J. Michael; Mason,, Robert R.
DiFrenna, V.J., Andrews, W.J., Russell, K.L., Norris, J.M., and Mason, R.R., Jr., 2020, Report of the River Master of the Delaware River for the period December 1, 2010–November 30, 2011: U.S. Geological Survey Open-File Report 2020–1020, 127 p., https://doi.org/10.3133/ofr20201020.

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Year Published: 2020

The relation of geogenic contaminants to groundwater age, aquifer hydrologic position, water type, and redox conditions in Atlantic and Gulf Coastal Plain aquifers, eastern and south-central USA

Groundwater age distributions developed from carbon-14 (14C), tritium (3H), and helium-4 (4He) concentrations, along with aquifer hydrologic position, water type, and redox conditions, were compared to geogenic contaminants of concern (GCOC) from 252 public-supply wells in six Atlantic and Gulf Coastal Plain unconsolidated-sediment aquifers....

Degnan, James R.; Lindsey, Bruce D.; Levitt, Joseph Patrick; Szabo, Zoltan

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Year Published: 2020

A historical look at changing water quality in the Delaware River Basin

In 2019 the U.S. Geological Survey (USGS) launched a pilot regional Integrated Water Availability Assessment (IWAA) in the Delaware River Basin (fig. 1). IWAA is intended to explore, test, and refine systems and processes for assessing water availability for human and ecological uses and understanding their underlying controls. Water quality plays...

Murphy, Jennifer C.; Shoda, Megan E.
Murphy, J.C., and Shoda, M.E., 2020, A historical look at changing water quality in the Delaware River Basin: U.S. Geological Survey Fact Sheet 2020–3007, 2 p., https://doi.org/10.3133/fs20203007.

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Year Published: 2020

Pooling resources across organizations—Multisource water-quality data for the Delaware River Basin

The U.S. Geological Survey (USGS) recently launched a pilot Integrated Water Availability Assessment (IWAA) in the Delaware River Basin to explore, test, and refine systems and processes for assessing water availability for human and ecological uses based on water monitoring data. Water-quality monitoring provides citizens, managers, and...

Murphy, Jennifer C.; Shoda, Megan E.
Murphy, J.C., and Shoda, M.E., 2020, Pooling resources across organizations—Multisource water-quality data for the Delaware River Basin: U.S. Geological Survey Fact Sheet 2020–3006, 2 p., https://doi.org/10.3133/fs20203006.

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Year Published: 2019

Report of the River Master of the Delaware River for the period December 1, 2009–November 30, 2010

A Decree of the Supreme Court of the United States, entered June 7, 1954, established the position of Delaware River Master within the U.S. Geological Survey. In addition, the Decree authorizes diversion of water from the Delaware River Basin and requires compensating releases from certain reservoirs, owned by New York City, to be made under the...

Russell, Kendra L.; Ockerman, Darwin; Krejmas, Bruce E.; Paulachok, Gary N.; Mason,, Robert R.
Russell, K.L., Ockerman, D., Krejmas, B.E., Paulachok, G.N., and Mason, R.R., Jr., 2019, Report of the River Master of the Delaware River for the period December 1, 2009–November 30, 2010: U.S. Geological Survey Open-File Report 2019–1093, 128 p., https://doi.org/10.3133/ofr20191093.

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Year Published: 2019

Response of nitrogen loading to the Chesapeake Bay to source reduction and land use change scenarios: A SPARROW‐informed analysis

In response to concerns regarding the health of streams and receiving waters, the United States Environmental Protection Agency established a total maximum daily load for nitrogen in the Chesapeake Bay watershed for which practices must be in place by 2025 resulting in an expected 25% reduction in load from 2009 levels. The response of total...

Miller, Matthew; Capel, Paul D.; Garcia, Ana M.; Ator, Scott W.

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Year Published: 2019

Mw 4.2 Delaware Earthquake of 30 November 2017

The 30 November 2017 Delaware earthquake with magnitude MW 4.2 occurred beneath the northeastern tip of the Delmarva Peninsula near Dover, Delaware. The earthquake and its aftershocks provide an opportunity to evaluate seismicity in a passive margin setting using much improved coverage by high-quality permanent broadband seismometers at regional...

Kim, Won-Young; Gold, Mitchell; Ramsay, Joseph; Meltzer, Anne; Wunsch, David; Baxter, Stefanie; Lekic, Vedran; Goodling, Phillip; Pearson, Karen; Wagner, Lara S.; Roman, Diana C.; Golden, Steven; Pratt, Thomas L.

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Year Published: 2016

High-resolution geophysical data collected along the Delmarva Peninsula, 2014, USGS Field Activity 2014-002-FA

The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy. A U.S. Geological Survey cruise was conducted in the summer of 2014 to map the inner continental shelf of the Delmarva Peninsula using geophysical and sampling techniques to define the geologic framework...

Pendleton, Elizabeth; Ackerman, Seth D.; Baldwin, Wayne E.; Danforth, William W.; Foster, David S.; Thieler, E. Robert; Brothers, Laura L.
Pendleton, E.A., Ackerman, S.D., Baldwin, W.E., Danforth, W.W., Foster, D.S., Thieler, E.R., and Brothers, L.L. 2015, High-resolution geophysical data collected along the Delmarva Peninsula, 2014, USGS Field Activity 2014-002-FA (ver. 2.0, March 2015): U.S. Geological Survey data release. http://dx.doi.org/10.5066/F7MW2F60

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Year Published: 2016

Sensitivity of the projected hydroclimatic environment of the Delaware River basin to formulation of potential evapotranspiration

The Delaware River Basin (DRB) encompasses approximately 0.4 % of the area of the United States (U.S.), but supplies water to 5 % of the population. We studied three forested tributaries to quantify the potential climate-driven change in hydrologic budget for two 25-year time periods centered on 2030 and 2060, focusing on sensitivity to...

Williamson, Tanja N.; Nystrom, Elizabeth A.; Milly, Paul C.D.
Williamson T.N., Nystrom E.A., Milly P.C.D. 2016. Sensitivity of the projected hydroclimatic environment of the Delaware River basin to formulation of potential evapotranspiration. Climatic Change 139:215-228. DOI: 10.1007/s10584-016-1782-2.

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Year Published: 2016

User’s guide for the Delaware River Basin Streamflow Estimator Tool (DRB-SET)

IntroductionThe Delaware River Basin Streamflow Estimator Tool (DRB-SET) is a tool for the simulation of streamflow at a daily time step for an ungaged stream location in the Delaware River Basin. DRB-SET was developed by the U.S. Geological Survey (USGS) and funded through WaterSMART as part of the National Water Census, a USGS research program...

Stuckey, Marla H.; Ulrich, James E.
Stuckey, M.H., and Ulrich, J.E., 2016, User’s Guide for the Delaware River Basin Streamflow Estimator Tool (DRB-SET): U.S. Geological Survey Open-File Report 2015–1192, 6 p., http://dx.doi.org/10.3133/ofr20151192.

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Year Published: 2015

Summary of hydrologic modeling for the Delaware River Basin using the Water Availability Tool for Environmental Resources (WATER)

The Water Availability Tool for Environmental Resources (WATER) is a decision support system for the nontidal part of the Delaware River Basin that provides a consistent and objective method of simulating streamflow under historical, forecasted, and managed conditions. In order to quantify the uncertainty associated with these simulations, however...

Williamson, Tanja N.; Lant, Jeremiah G.; Claggett, Peter R.; Nystrom, Elizabeth A.; Milly, Paul C.D.; Nelson, Hugh L.; Hoffman, Scott A.; Colarullo, Susan J.; Fischer, Jeffrey M.
Williamson, T.N., Lant, J.G., Claggett, P.R., Nystrom, E.A., Milly, P.C.D., Nelson, H.L., Hoffman, S.A., Colarullo, S.J., and Fischer, J.M., 2015, Summary of hydrologic modeling for the Delaware River Basin using the Water Availability Tool for Environmental Resources (WATER): U.S. Geological Survey Scientific Investigations Report 2015–5143, 68 p., http://dx.doi.org/10.3133/sir20155143.

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Floodplain and Channel Evaluation Tool (FACET)
December 4, 2019

The Floodplain and Evaluation Tool (FACET) is an open-source python tool that maps the floodplain extent and derives reach-scale summaries of stream and floodplain geomorphic measurements from high-resolution digital elevation models (DEMs).

Filter Total Items: 18
USGS Baltimore Office
September 8, 2020

USGS Baltimore Office

USGS Baltimore Office

Image from an application that navigates users through USGS National Oil and Gas Assessment Provinces
November 14, 2018

National Oil and Gas Assessment Provinces

This is a graphic from the USGS National Oil and Gas Assessment Explorer application, which allows user to drill into 70 oil and gas assessment provinces throughout the United States.

Image shows USGS scientists in PFDs collecting a seismic airgun while at sea
September 6, 2018

Retrieving Seismic Airguns

USGS personnel on the deck of the R/V Hugh R. Sharp during retrieval of seismic airguns.  The streamer that receives the seismic signals generated by the airguns is towed behind the ship and is here shown

...
September 30, 2017

USGS Hurricane Preparedness

Before a hurricane, USGS Scientists undertake a data collection effort of a grand scale. They install a temporary mobile network of sensors along the coasts to collect additional data on the intensity of storm surge, one of the most dangerous elements of a hurricane. This effort provides critical information that allows various USGS partners and emergency responders to

Satellite image showing the Delaware Bay and Chesapeake Bay region
January 25, 2017

Satellite Image of the Delaware Bay and Chesapeake Bay Region

This Indian Space Research Organization LISS-3 image of the Delaware Bay and Chesapeake Bay region, acquired on January 25, 2017, shows the landscape along the densely populated U.S. East coast. Ecosystems and sea-level rise are among the regional landscape changes that satellite imagery helps to monitor. 

Three osprey (Pandion haliaetus) nestlings
June 10, 2015

Three osprey (Pandion haliaetus) nestlings in Coastal Inland Bays

Three osprey (Pandion haliaetus) nestlings in Coastal Inland Bays, Rehoboth, Delaware in 2015.

Two osprey (Pandion haliaetus) nestlings
June 10, 2015

Two osprey (Pandion haliaetus) nestlings in Coastal Inland Bays

Two osprey (Pandion haliaetus) nestlings in Coastal Inland Bays, Rehoboth, Delaware in 2015.

Image: Thousands of Horseshoe Crabs on Slaughter Beach, Delaware
May 1, 2009

Thousands of Horseshoe Crabs on Slaughter Beach, Delaware

The morning after a full moon high tide spawn, thousands of horseshoe crabs wait on the mud flats for the high tide to return.

Attribution: Ecosystems
Image: Spawing Horshoe Crabs at Delaware Bay
May 1, 2009

Spawing Horshoe Crabs at Delaware Bay

Spawning horseshoe crabs at twilight in the Delaware Bay.

Attribution: Ecosystems
Image: Red Knots Forage for Horseshoe Crab Eggs at Delaware Bay
May 1, 2009

Red Knots Forage for Horseshoe Crab Eggs at Delaware Bay

Red knots forage for horseshoe crab eggs and other invertebrates on the beaches of Delaware Bay.  The bird on the left has a white leg flag marked with an "EX." It was initially capture in Canada in the fall of 2008.

Attribution: Ecosystems
Image: Red Knots Forage for Horseshoe Crab Eggs at Delaware Bay
May 1, 2009

Red Knots Forage for Horseshoe Crab Eggs at Delaware Bay

Red knots forage for horseshoe crab eggs and other invertebrates on the beaches of Delaware Bay. The bird in the center has an orange leg flag indicating it was captured and flagged in the past in Argentina.

Attribution: Ecosystems
Image: Horseshoe Crabs at Delaware Bay
May 19, 2006

Horseshoe Crabs at Delaware Bay

Horseshoe crabs congregate annually at Delaware Bay.

Attribution: Ecosystems
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Dragonfly larvae being held in an open hand
July 21, 2020

A team of federal, academic, and NGO researchers conducted a national-scale assessment of mercury bioaccumulation in aquatic ecosystems using dragonfly larvae as biosentinels.

Gage at LaVale, MD
July 1, 2020

There's a lot of talent at the Maryland, Delaware, Washington, DC Water Science Center!

We’ve created a series of websites, thematically named to characterize our work as our “Capabilities”, working interdependently with a diverse array of cooperative partners, the scientists, technicians, and support staff work tirelessly to produce the high-quality output for which the USGS is world renown.

Two people, wearing safety gear, stand on board a ship and retrieve an instrument, attached to heavy cable, from the water..
November 1, 2018

In August 2018, the USGS Coastal/Marine Hazards and Resources Program (CMHRP) completed the Mid-Atlantic Resource Imaging Experiment (MATRIX), a three-week cruise that acquired more than 2,000 kilometers of multichannel seismic data between Hudson Canyon and Cape Hatteras on the U.S. Atlantic margin.

Photograph of a sonobuoy launch
September 20, 2018

Data acquired by the U.S. Geological Survey on the U.S. Atlantic Margin in August 2018 reveal new information about the distribution of gas hydrates in the sector stretching from the upper continental slope to deep water areas offshore New Jersey to North Carolina.

Two osprey nestlings in the Delaware Estuary
July 10, 2018

Lower levels of environmental contaminants—including pesticides, flame retardants and other pollutants—were recently found in osprey eggs in the Delaware Estuary compared to those tested from the 1970s through the early 2000s. 

Nor'easter
March 1, 2018

USGS field crews are deploying storm-tide and wave sensors today from Maine to Delaware to track and study a Nor’easter forecasted to begin tomorrow.

Map showing the M4.1 earthquake epicenter near Dover, DE
November 30, 2017

The USGS has up-to-date details on the November 30, 2017 event.

Filter Total Items: 6

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