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Mark R Nardi

Mark Nardi is a Supervisory Geographer at the USGS MD-DE-DC Water Science Center.

I’m interested in many things related to geospatial and temporal analysis, especially as those topics relate to water quality and quantity.  My work has been mostly focused on water issues but also incudes using lidar to identify and map phragmites as well as lidar application to runway obstructions.  Other past work includes authorship of computer a program to calculate stream metabolism parameters from continuous water quality data.  More recent science work has included using a soil water balance model to estimate potential shallow groundwater recharge in support of regional groundwater flow models and field scale nutrient transport studies.  I’m also an Associate Director of the MD-DE-DC Water Science Center and manage the Delaware Office.

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Corn field in front of barn, silo, and houses

Data-sharing agreement renewed to evaluate conservations practices and water quality in the Chesapeake Watershed

Issue: The U.S. Geological Survey (USGS) and the Natural Resources Conservation Service (NRCS) have a mutual interest in meeting the goals of the Chesapeake Bay Watershed Agreement, and in determining the benefits and challenges of agricultural conservation practices on water-quality patterns. Understanding the sources of nutrients and sediment and how these nutrients move into streams and...
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Core Science Systems Mission Area, Chesapeake Bay Activities
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Data-sharing agreement renewed to evaluate conservations practices and water quality in the Chesapeake Watershed

Issue: The U.S. Geological Survey (USGS) and the Natural Resources Conservation Service (NRCS) have a mutual interest in meeting the goals of the Chesapeake Bay Watershed Agreement, and in determining the benefits and challenges of agricultural conservation practices on water-quality patterns. Understanding the sources of nutrients and sediment and how these nutrients move into streams and...
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Gridded South Carolina StreamStats Runoff Curve Numbers by NLCD Landcover and SSURGO Soils Class

This dataset was produced by the US Geological Survey as a supporting dataset to be used for the purpose of calculating stream gage basin characteristics in preparation for the South Carolina StreamStats application. This integer raster dataset represents runoff curve numbers for the combinations of hydrological soils groupings and land cover types within the South Carolina StreamStats study area.
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Maryland-Delaware-D.C. Water Science Center, StreamStats

Basin Characteristics Rasters for Delaware StreamStats 2020

This dataset was produced in by the Delaware Geological survey in cooperation with the US Geological Survey and Delaware Department of Transportation for the purpose of calculating stream gage basin characteristics in preparation for the Delaware 2020 StreamStats application. These datasets are raster representations of various environmental, geological, and land use attributes within the Delaware
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Maryland-Delaware-D.C. Water Science Center, StreamStats

Fundamental Dataset Rasters for Delaware StreamStats 2020

This dataset was produced in by the Delaware Geological survey in cooperation with the US Geological Survey and Delaware Department of Transportation for the purpose of delineating gage basins and performing hydrologic analysis in the Delaware 2020 StreamStats application. These datasets are raster representations of the fundamental dataset layers necessary for the functionality of StreamStats app
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Maryland-Delaware-D.C. Water Science Center, StreamStats

Soil-Water Balance model datasets used to estimate groundwater recharge in parts of North Carolina, South Carolina, and Georgia under 2015 conditions and future conditions using three downscaled climate models paired with two land cover scenarios

Groundwater recharge is an important part of water budget estimation and is a critical data component used in creating and calibrating groundwater flow models such as MODFLOW. Soil Water Balance Models (SWB) can be used to estimate potential groundwater recharge across spatial domains and through time. This metadata record describes an SWB archive for parts of the Coastal Plain of North Carolina,
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Maryland-Delaware-D.C. Water Science Center

Soil Water Balance Model datasets and models used to evaluate potential recharge to the Floridan Aquifer System, 1895 through 2010

A soil-water balance model (SWB) was developed to estimate potential recharge and irrigation water demand from the groundwater flow system in Florida and parts of Georgia, Alabama, and South Carolina for the period 1895 through 2010. This SWB model executable code detailed in the report SWB A Modified Thornthwaite-Mather Soil-Water-Balance Code for Estimating Groundwater Recharge; Chapter
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Water Resources Mission Area, Maryland-Delaware-D.C. Water Science Center

Soil-Water Balance model and datasets used to estimate groundwater recharge Brunswick, New Hanover, and Pender counties North Carolina 1980 through 2016

Soil water balance model archive for portions of North Carolina. The model was created to estimate recharge to the groundwater flow system in Brunswick, New Hanover, and Pender counties in North Carolina. The development of the model input and output files included in this model archive were created to support a regional groundwater flow model being produced for the surficial, Castle Hayne, and P
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Water Resources Mission Area, Maryland-Delaware-D.C. Water Science Center

Thickness of the Surficial Aquifer, Delmarva Peninsula, Maryland and Delaware

This map is a digital map of the thickness of the surficial unconfined aquifer and was produced to improve understanding of the hydrologic system and the potential for transport of soluble nutrients and other chemicals from groundwater to streams in the Maryland and Delaware portions of the Delmarva Peninsula. The map is intended to be used in conjunction with other environmental coverages (such
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Maryland-Delaware-D.C. Water Science Center
Image: SWaTH Bracket GPS survey, Assateague Island
SWaTH Bracket GPS survey, Assateague Island
SWaTH Bracket GPS survey, Assateague Island
Image: SWaTH Bracket GPS survey, Assateague Island

SWaTH Bracket GPS survey, Assateague Island

SWaTH Bracket GPS survey, Assateague Island

NPS employee operating GPS to establish elevation on sensor bracket for Sandy Theme 3 (SWaTH), Assateague Island at the Maryland Virginia State Line.

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Natural Hazards, Communications and Publishing
Image: SWaTH Bracket GPS survey, Assateague Island

SWaTH Bracket GPS survey, Assateague Island

SWaTH Bracket GPS survey, Assateague Island

NPS employee operating GPS to establish elevation on sensor bracket for Sandy Theme 3 (SWaTH), Assateague Island at the Maryland Virginia State Line.

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Natural Hazards, Communications and Publishing
Image: SWaTH Bracket Installation, Assateague Island Maryland
SWaTH Bracket Installation, Assateague Island Maryland
SWaTH Bracket Installation, Assateague Island Maryland
Image: SWaTH Bracket Installation, Assateague Island Maryland

SWaTH Bracket Installation, Assateague Island Maryland

SWaTH Bracket Installation, Assateague Island Maryland

USGS employee installing sensor bracket for Sandy Theme 3 (SWaTH), Assateague Island at the Maryland Virginia State Line.

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Natural Hazards, Communications and Publishing
Image: SWaTH Bracket Installation, Assateague Island Maryland

SWaTH Bracket Installation, Assateague Island Maryland

SWaTH Bracket Installation, Assateague Island Maryland

USGS employee installing sensor bracket for Sandy Theme 3 (SWaTH), Assateague Island at the Maryland Virginia State Line.

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Natural Hazards, Communications and Publishing
Filter Total Items: 18

Peak-flow and low-flow magnitude estimates at defined frequencies and durations for nontidal streams in Delaware

Reliable estimates of the magnitude of peak flows in streams are required for the economical and safe design of transportation and water conveyance structures. In addition, reliable estimates of the magnitude of low flows at defined frequencies and durations are needed for meeting regulatory requirements, quantifying base flows in streams and rivers, and evaluating time of travel and dilution of t
Authors
John C. Hammond, Edward J. Doheny, Jonathan J.A. Dillow, Mark R. Nardi, Peter A. Steeves, Daniel L. Warner
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StreamStats

Water quality in the surficial aquifer near agricultural areas in the Delaware Coastal Plain, 2014

The U.S. Geological Survey, in cooperation with the Delaware Department of Agriculture, developed a network of wells to monitor groundwater quality in the surficial aquifer of the Delaware Coastal Plain. Well-drained soils, a flat landscape, and accessible water in the Delaware Coastal Plain make for a productive agricultural setting. As such, agriculture is one of the largest industries in the St
Authors
Brandon J. Fleming, Laura L. Mensch, Judith M. Denver, Roberto M. Cruz, Mark R. Nardi
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Water Resources Mission Area, Chesapeake Bay Activities, Maryland-Delaware-D.C. Water Science Center

The Surge, Wave, and Tide Hydrodynamics (SWaTH) network of the U.S. Geological Survey—Past and future implementation of storm-response monitoring, data collection, and data delivery

After Hurricane Sandy made landfall along the northeastern Atlantic coast of the United States on October 29, 2012, the U.S. Geological Survey (USGS) carried out scientific investigations to assist with protecting coastal communities and resources from future flooding. The work included development and implementation of the Surge, Wave, and Tide Hydrodynamics (SWaTH) network consisting of more tha
Authors
Richard J. Verdi, R. Russell Lotspeich, Jeanne C. Robbins, Ronald Busciolano, John R. Mullaney, Andrew J. Massey, William S. Banks, Mark A. Roland, Harry L. Jenter, Marie C. Peppler, Thomas P. Suro, Christopher E. Schubert, Mark R. Nardi
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Water Resources Mission Area, Groundwater and Streamflow Information Program, Water Science School

Assessment of groundwater availability in the Northern Atlantic Coastal Plain aquifer system From Long Island, New York, to North Carolina

Executive SummaryThe U.S. Geological Survey began a multiyear regional assessment of groundwater availability in the Northern Atlantic Coastal Plain (NACP) aquifer system in 2010 as part of its ongoing regional assessments of groundwater availability of the principal aquifers of the Nation. The goals of this national assessment are to document effects of human activities on water levels and ground
Authors
John P. Masterson, Jason P. Pope, Michael N. Fienen, Jack Monti, Jr., Mark R. Nardi, Jason S. Finkelstein
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Water Resources Mission Area, South Atlantic Water Science Center (SAWSC), New England Water Science Center

Documentation of a groundwater flow model developed to assess groundwater availability in the Northern Atlantic Coastal Plain aquifer system from Long Island, New York, to North Carolina

The U.S. Geological Survey developed a groundwater flow model for the Northern Atlantic Coastal Plain aquifer system from Long Island, New York, to northeastern North Carolina as part of a detailed assessment of the groundwater availability of the area and included an evaluation of how these resources have changed over time from stresses related to human uses and climate trends. The assessment was
Authors
John P. Masterson, Jason P. Pope, Michael N. Fienen, Jack Monti, Jr., Mark R. Nardi, Jason S. Finkelstein
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Water Resources Mission Area, South Atlantic Water Science Center (SAWSC), New England Water Science Center

The Maryland Coastal Plain Aquifer Information System: A GIS-based tool for assessing groundwater resources

Groundwater is the source of drinking water for ∼1.4 million people in the Coastal Plain Province of Maryland (USA). In addition, groundwater is essential for commercial, industrial, and agricultural uses. Approximately 0.757 × 109 L d–1 (200 million gallons/d) were withdrawn in 2010. As a result of decades of withdrawals from the coastal plain confined aquifers, groundwater levels have declined b
Authors
David C. Andreasen, Mark R. Nardi, Andrew W. Staley, Grufron Achmad, John W. Grace
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Water Resources Mission Area, Maryland-Delaware-D.C. Water Science Center

Estimation of upstream water use with Ohio’s StreamStats application

This report describes the analytical methods and results of a pilot study to enhance the Ohio StreamStats application by adding the ability to obtain water-use information for selected areas in the northeast quadrant of Ohio. Water-use estimates are determined in StreamStats through a simple multistep process.  Water-use data used to develop the Ohio StreamStats water-use application were obtained
Authors
G. F. Koltun, Mark R. Nardi, Kimberly H. Shaffer
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Water Resources Mission Area, Ohio-Kentucky-Indiana Water Science Center

Geospatial compilation and digital map of centerpivot irrigated areas in the mid-Atlantic region, United States

To evaluate water availability within the Northern Atlantic Coastal Plain, the U.S. Geological Survey, in cooperation with the University of Delaware Agricultural Extension, created a dataset that maps the number of acres under center-pivot irrigation in the Northern Atlantic Coastal Plain study area. For this study, the extent of the Northern Atlantic Coastal Plain falls within areas of the State
Authors
Jason S. Finkelstein, Mark R. Nardi
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Water Resources Mission Area, New York Water Science Center

Hydrogeology and hydrologic conditions of the Northern Atlantic Coastal Plain aquifer System from Long Island, New York, to North Carolina

The seaward-dipping sedimentary wedge that underlies the Northern Atlantic Coastal Plain forms a complex groundwater system. This major source of water provides for public and domestic supply and serves as a vital source of freshwater for industrial and agricultural uses throughout the region. Population increases and land-use and climate changes, however, have led to competing demands for water.
Authors
John P. Masterson, Jason P. Pope, Jack Monti, Mark R. Nardi, Jason S. Finkelstein, Kurt J. McCoy
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Water Resources Mission Area, Water Availability and Use Science Program, South Atlantic Water Science Center (SAWSC)

Assessing groundwater availability in the Northern Atlantic Coastal Plain aquifer system

The U.S. Geological Survey's Groundwater Resources Program is conducting an assessment of groundwater availability throughout the United States to gain a better understanding of the status of the Nation's groundwater resources and how changes in land use, water use, and climate may affect those resources. The goal of this National assessment is to improve our ability to forecast water availability
Authors
John P. Masterson, Jason P. Pope, Jack Monti, Mark R. Nardi
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Water Resources Mission Area, Groundwater and Streamflow Information Program, Water Availability and Use Science Program, New England Water Science Center, USGS Science in Long Island Sound and its Watershed

Simulation of groundwater flow to assess future withdrawals associated with Base Realignment and Closure (BRAC) at Fort George G. Meade, Maryland

Increased groundwater withdrawals from confined aquifers in the Maryland Coastal Plain to supply anticipated growth at Fort George G. Meade (Fort Meade) and surrounding areas resulting from the Department of Defense Base Realignment and Closure Program may have adverse effects in the outcrop or near-outcrop areas. Specifically, increased pumping from the Potomac Group aquifers (principally the Pat
Authors
Jeff P. Raffensperger, Brandon J. Fleming, William S.L. Banks, Marilee A. Horn, Mark R. Nardi, David C. Andreasen
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Water Resources Mission Area, Maryland-Delaware-D.C. Water Science Center

Incorporation of water-use summaries into the StreamStats web application for Maryland

Approximately 25,000 new households and thousands of new jobs will be established in an area that extends from southwest to northeast of Baltimore, Maryland, as a result of the Federal Base Realignment and Closure (BRAC) process, with consequent new demands on the water resources of the area. The U.S. Geological Survey, in cooperation with the Maryland Department of the Environment, has extended t
Authors
Kernell G. Ries, Marilee A. Horn, Mark R. Nardi, Steven Tessler
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Water Resources Mission Area, Maryland-Delaware-D.C. Water Science Center, StreamStats
MD-DE-DC WSC Capabilities Sites

MD-DE-DC WSC Capabilities Sites

We’ve created a series of websites, thematically named to characterize our work as our “Capabilities”, working interdependently with a diverse array...

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