Pamela Lombard
Pamela Lombard is a Supervisory Hydrologist in the New England Water Science Center.
She currently works on surface water hydrology issues such as streamflow statistics, hydraulic modeling, flood documentation and mapping, water availability/wateruse, and drought, and leads the hydraulic modeling team at the center.
Professional Experience
Supervisory Hydrologist, U.S. Geological Survey, New England Water Science Center, 2021 to Present
Hydrologist, U.S. Geological Survey, New England Water Science Center, 1999 to 2021
Education and Certifications
M.S. Hydrology, Oregon State University, 1997
B.S. Dartmouth College, 1990
Science and Products
Filter Total Items: 32
2022 drought in New England 2022 drought in New England
Introduction During April through September 2022, much of New England experienced a short but extreme hydrologic drought that was similar to the drought of 2020. By August 2022, Providence, Rhode Island, was declared a Federal disaster area, and New London and Windham counties in Connecticut were declared natural disaster areas. Mandatory water use restrictions were put in place in...
Authors
Dee-Ann E. Crozier, Jonathan Lenoir, Pamela J. Lombard
Estimating streamflow for base flow conditions at partial-record streamgaging stations at Acadia National Park, Maine Estimating streamflow for base flow conditions at partial-record streamgaging stations at Acadia National Park, Maine
The objective of the work presented in this report is to develop equations that can be used to extend the base flow record at multiple partial-record streamgaging stations at Acadia National Park in eastern coastal Maine based on nearby continuous-record streamgaging stations. Daily mean streamflow values at U.S. Geological Survey continuous-record streamgaging station Otter Creek near...
Authors
Pamela J. Lombard
Documentation and mapping of flooding from the January and March 2018 nor’easters in coastal New England Documentation and mapping of flooding from the January and March 2018 nor’easters in coastal New England
In January and March 2018, coastal Massachusetts experienced flooding from two separate nor’easters. To put the January and March floods into historical context, the USGS computed statistical stillwater elevations. Stillwater elevations recorded in January 2018 in Boston (9.66 feet relative to the North American Vertical Datum of 1988) have an annual exceedance probability of between 2...
Authors
Pamela J. Lombard, Scott A. Olson, Luke P. Sturtevant, Rena D. Kalmon
Model estimated baseflow for streams with endangered Atlantic Salmon in Maine, USA Model estimated baseflow for streams with endangered Atlantic Salmon in Maine, USA
We present a regression model for estimating mean August baseflow per square kilometer of drainage area to help resource managers assess relative amounts of baseflow in Maine streams with Atlantic Salmon habitat. The model was derived from mean August baseflows computed at 31 USGS streamflow gages in Maine. We use an ordinary least squares regression model to estimate mean August...
Authors
Pamela J. Lombard, Robert W. Dudley, Matthias J. Collins, Rory Saunders, Ernie Atkinson
Estimating flood magnitude and frequency on gaged and ungaged streams in Maine Estimating flood magnitude and frequency on gaged and ungaged streams in Maine
Accurate estimates of flood frequency and magnitude on rivers and streams in Maine are a key component of effective flood risk management, flood mitigation, and flood recovery programs for the State. Flood-frequency estimates are published here for 148 streamgages in and adjacent to Maine. Equations are provided for users to compute flood-frequency estimates at any location on a stream...
Authors
Pamela J. Lombard, Glenn A. Hodgkins
River channel response to dam removals on the lower Penobscot River, Maine, United States River channel response to dam removals on the lower Penobscot River, Maine, United States
Most geomorphology studies of dam removals have focused on sites with appreciable quantities of stored sediments. There is great interest in channel responses to sediment releases because of potential effects on aquatic and riparian habitats and human uses of these areas. Yet, behind many dams in the Northeast U.S. and other regions of the world only minor accumulations of sediment are...
Authors
Mathias J. Collins, Alice R. Kelley, Pamela J. Lombard
Filter Total Items: 13
December 2023 Flood in Maine
The U.S. Geological Survey (USGS) New England Water Science Center, in cooperation with the Federal Emergency Management Agency (FEMA), is conducting a study to characterize the magnitude and extent of the December 18-21, 2023 Flood in various portions of the State of Maine.
July 2023 Flood in Vermont
From July 9 through July 12, 2023, 3 to 9 inches of rain fell within 48 hours across the state of Vermont, causing catastrophic flooding and millions of dollars in damage. The high amount of rain caused several rivers to peak at record levels, in some cases exceeding records set during Tropical Storm Irene in 2011.
Stream Flood Vulnerability Assessment at Acadia National Park
The U.S. Geological Survey (USGS) New England Water Science Center, in cooperation with Acadia National Park, is assessing the vulnerability of the park’s streams, culverts, and bridges to flood damage and erosion using design flows for selected high streamflow recurrence intervals to inform management decisions on infrastructure upgrades.
Water Resources Inventory and Assessment at Katahdin Woods and Waters National Monument
The U.S. Geological Survey (USGS) New England Water Science Center, in cooperation with the National Park Service, is compiling and evaluating all known water resources, and documented infrastructure associated with these resources, within the Katahdin Woods and Waters National Monument and contributing associated watersheds.
Evaluation of Lakes and Impoundments Drought Index for the Massachusetts Drought Management Plan
Lake and impoundment levels are used for calculating a drought severity index.
Developing Synthetic Historical Record at Groundwater Wells Using Record Extension Techniques
The Groundwater Index in the Massachusetts Drought Management Plan provides a general overview of groundwater levels relative to long-term groundwater levels in Massachusetts. The methods used to compute the Groundwater Index were revised for the 2019 version of the Drought Management Plan. The 2019 plan aligns the drought categories and specifies the drought status from select percentile ranges...
Data for Models Estimating Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA Data for Models Estimating Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA
The U.S. Geological Survey (USGS) developed a regression model for estimating August mean baseflow per square mile of drainage area to help resource managers assess relative amounts of baseflow in streams with Maine Atlantic Salmon habitat. The model was derived from August mean baseflows computed at 31 USGS streamgages in and near the Gulf of Maine Atlantic Salmon Habitat Recovery Units...
Spatial Coverage for Estimated Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA (version 1.1, June 2022) Spatial Coverage for Estimated Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA (version 1.1, June 2022)
The U.S. Geological Survey (USGS) developed a regression model for estimating mean August baseflow per square mile of drainage area in cooperation with National Oceanic and Atmospheric Administration (NOAA) to help resource managers assess relative amounts of baseflow in streams with Maine Atlantic Salmon habitat (Lombard and others, 2021). The model was applied to each reach of a stream...
Spatial Coverage for Estimated Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA Spatial Coverage for Estimated Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA
The U.S. Geological Survey (USGS) developed a regression model for estimating mean August baseflow per square mile of drainage area in cooperation with National Oceanic and Atmospheric Administration (NOAA) to help resource managers assess relative amounts of baseflow in streams with Maine Atlantic Salmon habitat (Lombard and others, 2021). The model was applied to each reach of a stream...
Data and shapefiles used to document the floods associated with the January and March 2018 Nor'easters for Coastal Areas of New England (ver. 2.0, November 2021) Data and shapefiles used to document the floods associated with the January and March 2018 Nor'easters for Coastal Areas of New England (ver. 2.0, November 2021)
The U.S. Geological Survey (USGS) New England Water Science Center worked with the Federal Emergency Management Agency to document the floods of January 4, 2018 and March 2-4, 2018, in coastal Massachusetts. USGS conducted a frequency analysis of stillwater elevations at three National Oceanic and Atmospheric Administration coastal gages following the coastal floods of 2018. The data for...
Results of peak-flow frequency analysis and regionalization for selected streamgages in or near Maine, based on data through water year 2019 Results of peak-flow frequency analysis and regionalization for selected streamgages in or near Maine, based on data through water year 2019
The U.S. Geological Survey (USGS) recently completed a report documenting methods for peak-flow frequency analysis following implementation of the Bulletin 17C guidelines (https://doi.org/10.3133/tm4B5). The methods provide estimates of peak-flow quantiles for 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEPs) for selected streamgages operated by the...
Penobscot River Cross Section Data pre- and post-Dam Removal Penobscot River Cross Section Data pre- and post-Dam Removal
The Great Works (20 feet high) and Veazie (30 feet high) dams on the lower section of the Penobscot River in Maine were removed during the summers of 2012 and 2013, respectively. Channel cross sections upstream and downstream of these dams from just below the Milford Dam to the head‐of‐tide at Eddington Bend just below the former Veazie Dam were surveyed before and after the dams were...
Flood-inundation maps for the Wabash River at Terre Haute, Indiana Flood-inundation maps for the Wabash River at Terre Haute, Indiana
Digital flood-inundation maps for a 6.3-mi reach of the Wabash River from 0.1 mi downstream of the Interstate 70 bridge to 1.1 miles upstream of the Route 63 bridge, Terre Haute, Indiana, were created by the U.S. Geological Survey (USGS) in cooperation with the Indiana Department of Transportation. The inundation maps, which can be accessed through the USGS Flood Inundation Mapping...
Flood-inundation maps for the East Fork White River at Columbus, Indiana Flood-inundation maps for the East Fork White River at Columbus, Indiana
Digital flood-inundation maps for a 5.4-mile reach of the East Fork White River at Columbus, Indiana, from where the Flatrock and Driftwood Rivers combine to make up East Fork White River to just upstream of the confluence of Clifty Creek with the East Fork White River, were created by the U.S. Geological Survey (USGS) in cooperation with the Indiana Department of Transportation. The...
2018 Nor’easter Storm Events in Coastal New England 2018 Nor’easter Storm Events in Coastal New England
Dashboard presenting nor’easter storm events in coastal New England in January and March 2018.
January and March 2018 Nor'easters January and March 2018 Nor'easters
Geonarrative about flood documentation and mapping of two large storm events in coastal Massachusetts.
Science and Products
Filter Total Items: 32
2022 drought in New England 2022 drought in New England
Introduction During April through September 2022, much of New England experienced a short but extreme hydrologic drought that was similar to the drought of 2020. By August 2022, Providence, Rhode Island, was declared a Federal disaster area, and New London and Windham counties in Connecticut were declared natural disaster areas. Mandatory water use restrictions were put in place in...
Authors
Dee-Ann E. Crozier, Jonathan Lenoir, Pamela J. Lombard
Estimating streamflow for base flow conditions at partial-record streamgaging stations at Acadia National Park, Maine Estimating streamflow for base flow conditions at partial-record streamgaging stations at Acadia National Park, Maine
The objective of the work presented in this report is to develop equations that can be used to extend the base flow record at multiple partial-record streamgaging stations at Acadia National Park in eastern coastal Maine based on nearby continuous-record streamgaging stations. Daily mean streamflow values at U.S. Geological Survey continuous-record streamgaging station Otter Creek near...
Authors
Pamela J. Lombard
Documentation and mapping of flooding from the January and March 2018 nor’easters in coastal New England Documentation and mapping of flooding from the January and March 2018 nor’easters in coastal New England
In January and March 2018, coastal Massachusetts experienced flooding from two separate nor’easters. To put the January and March floods into historical context, the USGS computed statistical stillwater elevations. Stillwater elevations recorded in January 2018 in Boston (9.66 feet relative to the North American Vertical Datum of 1988) have an annual exceedance probability of between 2...
Authors
Pamela J. Lombard, Scott A. Olson, Luke P. Sturtevant, Rena D. Kalmon
Model estimated baseflow for streams with endangered Atlantic Salmon in Maine, USA Model estimated baseflow for streams with endangered Atlantic Salmon in Maine, USA
We present a regression model for estimating mean August baseflow per square kilometer of drainage area to help resource managers assess relative amounts of baseflow in Maine streams with Atlantic Salmon habitat. The model was derived from mean August baseflows computed at 31 USGS streamflow gages in Maine. We use an ordinary least squares regression model to estimate mean August...
Authors
Pamela J. Lombard, Robert W. Dudley, Matthias J. Collins, Rory Saunders, Ernie Atkinson
Estimating flood magnitude and frequency on gaged and ungaged streams in Maine Estimating flood magnitude and frequency on gaged and ungaged streams in Maine
Accurate estimates of flood frequency and magnitude on rivers and streams in Maine are a key component of effective flood risk management, flood mitigation, and flood recovery programs for the State. Flood-frequency estimates are published here for 148 streamgages in and adjacent to Maine. Equations are provided for users to compute flood-frequency estimates at any location on a stream...
Authors
Pamela J. Lombard, Glenn A. Hodgkins
River channel response to dam removals on the lower Penobscot River, Maine, United States River channel response to dam removals on the lower Penobscot River, Maine, United States
Most geomorphology studies of dam removals have focused on sites with appreciable quantities of stored sediments. There is great interest in channel responses to sediment releases because of potential effects on aquatic and riparian habitats and human uses of these areas. Yet, behind many dams in the Northeast U.S. and other regions of the world only minor accumulations of sediment are...
Authors
Mathias J. Collins, Alice R. Kelley, Pamela J. Lombard
Filter Total Items: 13
December 2023 Flood in Maine
The U.S. Geological Survey (USGS) New England Water Science Center, in cooperation with the Federal Emergency Management Agency (FEMA), is conducting a study to characterize the magnitude and extent of the December 18-21, 2023 Flood in various portions of the State of Maine.
July 2023 Flood in Vermont
From July 9 through July 12, 2023, 3 to 9 inches of rain fell within 48 hours across the state of Vermont, causing catastrophic flooding and millions of dollars in damage. The high amount of rain caused several rivers to peak at record levels, in some cases exceeding records set during Tropical Storm Irene in 2011.
Stream Flood Vulnerability Assessment at Acadia National Park
The U.S. Geological Survey (USGS) New England Water Science Center, in cooperation with Acadia National Park, is assessing the vulnerability of the park’s streams, culverts, and bridges to flood damage and erosion using design flows for selected high streamflow recurrence intervals to inform management decisions on infrastructure upgrades.
Water Resources Inventory and Assessment at Katahdin Woods and Waters National Monument
The U.S. Geological Survey (USGS) New England Water Science Center, in cooperation with the National Park Service, is compiling and evaluating all known water resources, and documented infrastructure associated with these resources, within the Katahdin Woods and Waters National Monument and contributing associated watersheds.
Evaluation of Lakes and Impoundments Drought Index for the Massachusetts Drought Management Plan
Lake and impoundment levels are used for calculating a drought severity index.
Developing Synthetic Historical Record at Groundwater Wells Using Record Extension Techniques
The Groundwater Index in the Massachusetts Drought Management Plan provides a general overview of groundwater levels relative to long-term groundwater levels in Massachusetts. The methods used to compute the Groundwater Index were revised for the 2019 version of the Drought Management Plan. The 2019 plan aligns the drought categories and specifies the drought status from select percentile ranges...
Data for Models Estimating Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA Data for Models Estimating Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA
The U.S. Geological Survey (USGS) developed a regression model for estimating August mean baseflow per square mile of drainage area to help resource managers assess relative amounts of baseflow in streams with Maine Atlantic Salmon habitat. The model was derived from August mean baseflows computed at 31 USGS streamgages in and near the Gulf of Maine Atlantic Salmon Habitat Recovery Units...
Spatial Coverage for Estimated Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA (version 1.1, June 2022) Spatial Coverage for Estimated Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA (version 1.1, June 2022)
The U.S. Geological Survey (USGS) developed a regression model for estimating mean August baseflow per square mile of drainage area in cooperation with National Oceanic and Atmospheric Administration (NOAA) to help resource managers assess relative amounts of baseflow in streams with Maine Atlantic Salmon habitat (Lombard and others, 2021). The model was applied to each reach of a stream...
Spatial Coverage for Estimated Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA Spatial Coverage for Estimated Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA
The U.S. Geological Survey (USGS) developed a regression model for estimating mean August baseflow per square mile of drainage area in cooperation with National Oceanic and Atmospheric Administration (NOAA) to help resource managers assess relative amounts of baseflow in streams with Maine Atlantic Salmon habitat (Lombard and others, 2021). The model was applied to each reach of a stream...
Data and shapefiles used to document the floods associated with the January and March 2018 Nor'easters for Coastal Areas of New England (ver. 2.0, November 2021) Data and shapefiles used to document the floods associated with the January and March 2018 Nor'easters for Coastal Areas of New England (ver. 2.0, November 2021)
The U.S. Geological Survey (USGS) New England Water Science Center worked with the Federal Emergency Management Agency to document the floods of January 4, 2018 and March 2-4, 2018, in coastal Massachusetts. USGS conducted a frequency analysis of stillwater elevations at three National Oceanic and Atmospheric Administration coastal gages following the coastal floods of 2018. The data for...
Results of peak-flow frequency analysis and regionalization for selected streamgages in or near Maine, based on data through water year 2019 Results of peak-flow frequency analysis and regionalization for selected streamgages in or near Maine, based on data through water year 2019
The U.S. Geological Survey (USGS) recently completed a report documenting methods for peak-flow frequency analysis following implementation of the Bulletin 17C guidelines (https://doi.org/10.3133/tm4B5). The methods provide estimates of peak-flow quantiles for 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEPs) for selected streamgages operated by the...
Penobscot River Cross Section Data pre- and post-Dam Removal Penobscot River Cross Section Data pre- and post-Dam Removal
The Great Works (20 feet high) and Veazie (30 feet high) dams on the lower section of the Penobscot River in Maine were removed during the summers of 2012 and 2013, respectively. Channel cross sections upstream and downstream of these dams from just below the Milford Dam to the head‐of‐tide at Eddington Bend just below the former Veazie Dam were surveyed before and after the dams were...
Flood-inundation maps for the Wabash River at Terre Haute, Indiana Flood-inundation maps for the Wabash River at Terre Haute, Indiana
Digital flood-inundation maps for a 6.3-mi reach of the Wabash River from 0.1 mi downstream of the Interstate 70 bridge to 1.1 miles upstream of the Route 63 bridge, Terre Haute, Indiana, were created by the U.S. Geological Survey (USGS) in cooperation with the Indiana Department of Transportation. The inundation maps, which can be accessed through the USGS Flood Inundation Mapping...
Flood-inundation maps for the East Fork White River at Columbus, Indiana Flood-inundation maps for the East Fork White River at Columbus, Indiana
Digital flood-inundation maps for a 5.4-mile reach of the East Fork White River at Columbus, Indiana, from where the Flatrock and Driftwood Rivers combine to make up East Fork White River to just upstream of the confluence of Clifty Creek with the East Fork White River, were created by the U.S. Geological Survey (USGS) in cooperation with the Indiana Department of Transportation. The...
2018 Nor’easter Storm Events in Coastal New England 2018 Nor’easter Storm Events in Coastal New England
Dashboard presenting nor’easter storm events in coastal New England in January and March 2018.
January and March 2018 Nor'easters January and March 2018 Nor'easters
Geonarrative about flood documentation and mapping of two large storm events in coastal Massachusetts.