Paul Barlow

Science and Products

• Science
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  September 14, 2022

  Satellite-based Remote Sensing of River Discharge

  The U.S. Geological Survey and NASA are collaborating on a study to develop methods to estimate river flows from satellite observations.

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  Alaska Science Center, New England Water Science Center

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  September 14, 2022

  Satellite-based Remote Sensing of River Discharge

  The U.S. Geological Survey and NASA are collaborating on a study to develop methods to estimate river flows from satellite observations.

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  March 31, 2021

  Hydrologic Interpretive Program

  The mission of the Hydrologic Interpretive Program is to work with stakeholders to design, carry out, and publish scientific studies addressing critical water-resources issues facing New England and the Nation.

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  New England Water Science Center

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  March 31, 2021

  Hydrologic Interpretive Program

  The mission of the Hydrologic Interpretive Program is to work with stakeholders to design, carry out, and publish scientific studies addressing critical water-resources issues facing New England and the Nation.

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  March 8, 2021

  Assessment of Nutrient Transport and Discharge to Coastal Embayments, Wickford, Rhode Island

  In 2020 the USGS began a partnership with the U.S. Environmental Protection Agency (EPA) Region 1 Southeast New England Program for Coastal Watershed Restoration (SNEP) and EPA Office of Research and Development (ORD), Atlantic Coastal Sciences Division, Narragansett, RI in support of water-quality and ecological monitoring being conducted by ORD in the coastal waters around Wickford, RI. The USGS...

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  New England Water Science Center

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  March 8, 2021

  Assessment of Nutrient Transport and Discharge to Coastal Embayments, Wickford, Rhode Island

  In 2020 the USGS began a partnership with the U.S. Environmental Protection Agency (EPA) Region 1 Southeast New England Program for Coastal Watershed Restoration (SNEP) and EPA Office of Research and Development (ORD), Atlantic Coastal Sciences Division, Narragansett, RI in support of water-quality and ecological monitoring being conducted by ORD in the coastal waters around Wickford, RI. The USGS...

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  January 6, 2019

  USGS Publications on the Water Resources of Cape Cod and Southeastern Massachusetts

  The U.S. Geological Survey (USGS) has been investigating groundwater and surface-water resources on Cape Cod for more than 50 years. Recent studies have focused on the sources of water to public-supply wells, ponds, streams, and coastal areas; transport and discharge of nitrogen and contaminants of emerging concern derived from domestic and municipal wastewater disposal; fate and transport of...

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  New England Water Science Center

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  January 6, 2019

  USGS Publications on the Water Resources of Cape Cod and Southeastern Massachusetts

  The U.S. Geological Survey (USGS) has been investigating groundwater and surface-water resources on Cape Cod for more than 50 years. Recent studies have focused on the sources of water to public-supply wells, ponds, streams, and coastal areas; transport and discharge of nitrogen and contaminants of emerging concern derived from domestic and municipal wastewater disposal; fate and transport of...

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• Data
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  August 1, 2023

  MODFLOW-2000 and Management-Optimization Models Used to Evaluate Alternative Groundwater-Withdrawal Scenarios on Water Levels in Kingsbury Pond, Upper Charles River Basin, Eastern Massachusetts

  An existing, three-dimensional, transient groundwater-flow model of the Upper Charles River Basin, eastern Massachusetts, was modified to evaluate alternative groundwater-withdrawal scenarios on water levels in Kingsbury Pond. The pond is hydraulically connected to the groundwater-flow system, and water levels in the pond fluctuate in response to recharge to the aquifer from precipitation and wast

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  New England Water Science Center

  March 6, 2019

  Estimated and measured streamflow and groundwater-level data in the Mississippi Delta

  This data release provides the data that support the findings in "Characterizing groundwater and surface-water interaction using hydrograph-separation techniques and groundwater-level data throughout the Mississippi Delta" by Killian and others (2019). There are two child items below: (1) Estimated baseflow includes the baseflow_est data and metadata that contain daily mean streamflow data provid

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  Lower Mississippi-Gulf Water Science Center

  June 25, 2018

  National-Scale Grid to Support Regional Groundwater Availability Studies and a National Hydrogeologic Framework

  The National Hydrogeologic Grid (NHG) dataset includes a raster and vector representation of 1-km cells defining a uniform grid that encompasses the continental United States. The value of each cell of the raster dataset corresponds to the 1-km cell number defined as 'cellnum' in the attributes of the vector data. The NHG consists of 4,000 rows and 4,980 columns, numbered from the top left corner

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  Water Resources Mission Area, Groundwater and Streamflow Information Program
• Publications
  Filter Total Items: 46

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  Year20232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995

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  July 31, 2023

  Evaluation of alternative groundwater-withdrawal scenarios on water levels in Kingsbury Pond, upper Charles River Basin, eastern Massachusetts

  Kingsbury Pond is a glacial kettle pond in the town of Norfolk, Massachusetts, in the Mill River Basin, which is part of the Upper Charles River Basin in eastern Massachusetts. The pond is hydraulically connected to the surrounding groundwater-flow system, and water levels in the pond fluctuate in response to recharge to the aquifer from precipitation and wastewater return flows through septic sys

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  Paul M. Barlow, Paul J. Friesz, Jeffrey R. Barbaro

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  Water Resources Mission Area, New England Water Science Center

  May 4, 2022

  U.S. Geological Survey Hydrologic Toolbox — A graphical and mapping interface for analysis of hydrologic data

  The Hydrologic Toolbox is a Windows-based desktop software program that provides a graphical and mapping interface for analysis of hydrologic time-series data with a set of widely used and standardized computational methods. The software combines the analytical and statistical functionality provided in the U.S. Geological Survey Groundwater and Surface-Water Toolboxes and provides several enhancem

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  Paul M. Barlow, Amy R. McHugh, Julie E. Kiang, Tong Zhai, Paul Hummel, Paul Duda, Scott Hinz

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  Water Resources Mission Area, New England Water Science Center

  March 16, 2022

  GW/SW-MST: A groundwater/surface-water method selection tool

  Groundwater/surface-water (GW/SW) exchange and hyporheic processes are topics receiving increasing attention from the hydrologic community. Hydraulic, chemical, temperature, geophysical, and remote sensing methods are used to achieve various goals (e.g., inference of GW/SW exchange, mapping of bed materials, etc.), but the application of these methods is constrained by site conditions such as wate

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  Steven Hammett, Frederick Day-Lewis, Brett Russell Trottier, Paul M. Barlow, Martin A. Briggs, Geoffrey N. Delin, Judson Harvey, Carole D. Johnson, John W. Lane, D. O. Rosenberry, Dale D. Werkema

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  Water Resources Mission Area

  May 25, 2019

  Characterizing groundwater/surface-water interaction using hydrograph-separation techniques and groundwater-level data throughout the Mississippi Delta, USA

  The Mississippi Delta, located in northwest Mississippi, is an area dense with industrial-level agriculture sustained by groundwater-dependent irrigation supplied by the Mississippi River Valley Alluvial aquifer (alluvial aquifer). The Delta provides agricultural commodities across the United States and around the world. Observed declines in groundwater altitudes and streamflow contemporaneous wit

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  Courtney D. Killian, William H. Asquith, Jeannie R. B. Barlow, Gardner C. Bent, Wade Kress, Paul M. Barlow, Darrel W. Schmitz

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  Water Resources Mission Area, Groundwater and Streamflow Information Program, Oklahoma-Texas Water Science Center, New England Water Science Center, Lower Mississippi-Gulf Water Science Center

  September 12, 2018

  Continuing progress toward a national assessment of water availability and use

  Executive SummaryThe Omnibus Public Land Management Act of 2009 (Public Law 111—11) was passed into law on March 30, 2009. Subtitle F, also known as the SECURE Water Act, calls for the establishment of a “national water availability and use assessment program” within the U.S. Geological Survey (USGS). The USGS issued the first report on the program in 2013. Program progress over the period 2013–17

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  Eric J. Evenson, Sonya A. Jones, Nancy L. Barber, Paul M. Barlow, David L. Blodgett, Breton W. Bruce, Kyle R. Douglas-Mankin, William H. Farmer, Jeffrey M. Fischer, William B. Hughes, Jonathan Kennen, Julie E. Kiang, Molly A. Maupin, Howard W. Reeves, Gabriel B. Senay, Jennifer S. Stanton, Chad R. Wagner, Jennifer T. Wilson

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  Water Resources Mission Area, Water Availability and Use Science Program, Earth Resources Observation and Science (EROS) Center

  September 2, 2018

  Interstate water management of a “hidden” resource - Physical principles of groundwater hydrology

  Groundwater systems are dynamic geologic environments in which water continuously flows from recharge areas to discharge areas at streams, springs, wetlands, coastal waters, and wells. Natural, predevelopment conditions within groundwater systems are changed by the introduction of wells and other human stresses that modify existing groundwater levels, flow paths, and hydrologic budgets. Groundwate

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  Paul M. Barlow

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  Groundwater and Streamflow Information Program

  March 15, 2018

  Capture versus capture zones: Clarifying terminology related to sources of water to wells

  The term capture, related to the source of water derived from wells, has been used in two distinct yet related contexts by the hydrologic community. The first is a water‐budget context, in which capture refers to decreases in the rates of groundwater outflow and (or) increases in the rates of recharge along head‐dependent boundaries of an aquifer in response to pumping. The second is a transport c

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  Paul M. Barlow, Stanley A. Leake, Michael N. Fienen

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  Groundwater and Streamflow Information Program

  February 1, 2018

  A tool for efficient, model-independent management optimization under uncertainty

  To fill a need for risk-based environmental management optimization, we have developed PESTPP-OPT, a model-independent tool for resource management optimization under uncertainty. PESTPP-OPT solves a sequential linear programming (SLP) problem and also implements (optional) efficient, “on-the-fly” (without user intervention) first-order, second-moment (FOSM) uncertainty techniques to estimate mode

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  Jeremy T. White, Michael N. Fienen, Paul M. Barlow, Dave E. Welter

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  Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center

  June 7, 2017

  Depletion mapping and constrained optimization to support managing groundwater extraction

  Groundwater models often serve as management tools to evaluate competing water uses including ecosystems, irrigated agriculture, industry, municipal supply, and others. Depletion potential mapping—showing the model-calculated potential impacts that wells have on stream baseflow—can form the basis for multiple potential management approaches in an oversubscribed basin. Specific management approache

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  Michael N. Fienen, Kenneth R. Bradbury, Maribeth Kniffin, Paul M. Barlow

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  Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center

  April 11, 2017

  Groundwater flow model for the Little Plover River basin in Wisconsin’s Central Sands

  The Little Plover River is a groundwater-fed stream in the sand plains region of central Wisconsin. In this region, sandy sediment deposited during or soon after the last glaciation forms an important unconfined sand and gravel aquifer. This aquifer supplies water for numerous high-capacity irrigation, municipal, and industrial wells that support a thriving agricultural industry. In recent years t

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  Ken Bradbury, Michael N. Fienen, Maribeth Kniffin, Jacob Krause, Stephen M. Westenbroek, Andrew T. Leaf, Paul M. Barlow

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  Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center

  October 2, 2015

  Documentation of a restart option for the U.S. Geological Survey coupled Groundwater and Surface-Water Flow (GSFLOW) model

  A new option to write and read antecedent conditions (also referred to as initial conditions) has been developed for the U.S. Geological Survey (USGS) Groundwater and Surface-Water Flow (GSFLOW) numerical, hydrologic simulation code. GSFLOW is an integration of the USGS Precipitation-Runoff Modeling System (PRMS) and USGS Modular Groundwater-Flow Model (MODFLOW), and provides three simulation mode

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  R. Steve Regan, Richard G. Niswonger, Steven L. Markstrom, Paul M. Barlow

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  Water Resources Mission Area, Groundwater and Streamflow Information Program

  January 13, 2015

  U.S. Geological Survey groundwater toolbox, a graphical and mapping interface for analysis of hydrologic data (version 1.0): user guide for estimation of base flow, runoff, and groundwater recharge from streamflow data

  This report is a user guide for the streamflow-hydrograph analysis methods provided with version 1.0 of the U.S. Geological Survey (USGS) Groundwater Toolbox computer program. These include six hydrograph-separation methods to determine the groundwater-discharge (base-flow) and surface-runoff components of streamflow—the Base-Flow Index (BFI; Standard and Modified), HYSEP (Fixed Interval, Sliding

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  Paul M. Barlow, William L. Cunningham, Tong Zhai, Mark Gray

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  Water Resources Mission Area, Groundwater and Streamflow Information Program
• Software
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  May 19, 2022

  U.S. Geological Survey Hydrologic Toolbox Software Archive

  The U.S. Geological Survey Hydrologic Toolbox is a Windows-based desktop software program that provides a graphical and mapping interface for analysis of hydrologic time-series data with a set of widely used and standardized computational methods. The software combines the analytical and statistical functionality provided in the U.S. Geological Survey Groundwater and Surface-Water Toolboxes. The m

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  New England Water Science Center

  March 4, 2019

  The Groundwater Toolbox: A Graphical and Mapping Interface for Analysis of Hydrologic Data

  The Groundwater Toolbox is a graphical and mapping interface for analysis of hydrologic data. It provides methods to estimate many of the components of the water budget for a hydrologic basin, including precipitation, streamflow, base flow, runoff, groundwater recharge and evapotranspiration. As of May 2022, the Groundwater Toolbox has been superseded by the Hydrologic Toolbox.

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  Water Resources Mission Area

  September 11, 2015

  GWM: Groundwater Management Process for MODFLOW Using Optimization

  GWM is a Groundwater Management Process for the U.S. Geological Survey modular three-dimensional groundwater model, MODFLOW.

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  Water Resources Mission Area, Water Resources Mission Area
• News
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  September 24, 2021

  Science in Support of Aquatic-Ecosystem Conservation and Restoration

  Human land- and water-management practices have resulted in modifications to natural streamflow conditions and reduced the ecological health of...

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  January 22, 2015

  USGS Groundwater Toolbox: A New Way to Analyze Hydrologic Data

  The U.S. Geological Survey (USGS) has released a convenient and informative new method for the analysis of groundwater and surface-water hydrologic...

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