Pamela Lombard
Biography
Pamela Lombard is a hydrologist with the USGS New England Water Science Center in Augusta, Maine where she has been employed since 1999. 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. She received a master's degree in hydrology from Oregon State University (1997) and a bachelor's degree from Dartmouth College (1990).
Science and Products
Applied Hydrology Program
The mission of the Applied Hydrology Program of the U.S. Geological Survey (USGS) New England Water Science Center (WSC) is to support water resource managers, stakeholders, and policy makers with the hydrologic data, interpretation, and tools they need to manage and make critical decisions about water resources throughout New England. This program is divided into two broad sections: the...
Development of Flood Insurance Maps in New England
FEMA has requested USGS expertise in hydraulics, hydrology, and mapping to generate flood insurance maps for New England.
Development of Regional Regression Equations to Estimate the Magnitude of Peak Flows for Selected Annual-Exceedance Probabilities in Maine
Knowledge of the magnitude and frequency of floods is needed for the effective and safe design of bridges, culverts, and other structures. This information is also important for flood-plain planning and management. The flood-frequency characteristics for streamgages and regression equations for estimating flood magnitudes at ungaged sites were last developed in 1999 (Hodgkins, 1999).
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...
Lombard, Pamela J.; Dudley, Robert; Collins, Matthias J.; Saunders, Rory; Atkinson, Ernie
2020 drought in New England
Below average and infrequent rainfall from May through September 2020 led to an extreme hydrologic drought across much of New England, with some areas experiencing a flash drought, reflecting its quick onset. The U.S. Geological Survey (USGS) recorded record-low streamflow and groundwater levels throughout the region. In September, the U.S....
Lombard, Pamela J.; Barclay, Janet R.; McCarthy, Dee-Ann E.
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-...
Lombard, Pamela J.; Hodgkins, Glenn A. A multi-model approach toward understanding iron fouling at rock-fill drainage sites along roadways in New Hampshire, USA
Factors affecting iron fouling in wet areas adjacent to roadways were investigated by collecting field rock cut and aqueous physicochemical data; developing exploratory predictive models; and developing geochemical models. Basic data included the identification of iron fouling from aerial imagery and field visits at 374 New Hampshire rock cut...
Lombard, Melissa; Lombard, Pamela J.; Brown, Craig J.; Degnan, James
Establishment of a vertical control network along the St. Croix River in New Brunswick and Maine
Consistent elevations at stable benchmarks, referenced to a common datum, are important for measuring and comparing water levels and for computing flows throughout a watershed. Elevations are presented for 38 control points within the St. Croix River watershed, mostly along the main stem of the St. Croix River. Vertical control points are located...
Lombard, Pamela J.
Flood-inundation maps for the lower Pawcatuck River in Westerly, Rhode Island, and Stonington and North Stonington, Connecticut
A series of 11 digital flood-inundation maps was developed for a 5.5-mile reach of the lower Pawcatuck River in Westerly, Rhode Island, and Stonington and North Stonington, Connecticut, by the U.S. Geological Survey (USGS) in cooperation with the Town of Westerly, Rhode Island, and the Rhode Island Office of Housing and Community Development. The...
Bent, Gardner C.; Lombard, Pamela J.
Flood-inundation maps for the Pawtuxet River in West Warwick, Warwick, and Cranston, Rhode Island
A series of 15 digital flood-inundation maps was developed for a 10.2-mile reach of the Pawtuxet River in the municipalities of West Warwick, Warwick, and Cranston, Rhode Island, by the U.S. Geological Survey (USGS), in cooperation with the Rhode Island Emergency Management Agency and the U.S. Army Corps of Engineers. The coverage of the maps...
Bent, Gardner C.; Lombard, Pamela J. Estimating lag to peak between rainfall and peak streamflow with a mixed-effects model
We test the use of a mixed-effects model for estimating lag to peak for small basins in Maine (drainage areas from 0.8 to 78 km2). Lag to peak is defined as the time between the center of volume of the excess rainfall during a storm event and the resulting peak streamflow. A mixed-effects model allows for multiple observations at sites without...
Lombard, Pamela J.; Holtschlag, David
Estimation of unregulated monthly, annual, and peak streamflows in Forest City Stream and lake levels in East Grand Lake, United States-Canada border between Maine and New Brunswick
The U.S. Geological Survey, in cooperation with the International Joint Commission, compiled historical data on regulated streamflows and lake levels and estimated unregulated streamflows and lake levels on Forest City Stream at Forest City, Maine, and East Grand Lake on the United States-Canada border between Maine and New Brunswick to study the...
Lombard, Pamela J.
Hydrologic and hydraulic analyses of Great Meadow wetland, Acadia National Park, Maine
The U.S. Geological Survey completed hydrologic and hydraulic analyses of Cromwell Brook and the Sieur de Monts tributary in Acadia National Park, Maine, to better understand causes of flooding in complex hydrologic and hydraulic environments, like those in the Great Meadow wetland and Sieur de Monts Spring area. Regional regression equations were...
Lombard, Pamela J.
Flood-inundation maps for the Hoosic River, North Adams and Williamstown, Massachusetts, from the confluence with the North Branch Hoosic River to the Vermont State line
A series of nine digital flood-inundation maps were developed for an 8-mile reach of the Hoosic River in North Adams and Williamstown, Massachusetts, by the U.S. Geological Survey (USGS) in cooperation with the Federal Emergency Management Agency. The coverage of the maps extends from the confluence with the North Branch Hoosic River to the...
Lombard, Pamela J.; Bent, Gardner C.
Peak flow regression equations For small, ungaged streams in Maine: Comparing map-based to field-based variables
Regression equations to estimate peak streamflows with 1- to 500-year recurrence intervals (annual exceedance probabilities from 99 to 0.2 percent, respectively) were developed for small, ungaged streams in Maine. Equations presented here are the best available equations for estimating peak flows at ungaged basins in Maine with drainage areas from...
Lombard, Pamela J.; Hodgkins, Glenn A.