Samantha Sullivan
Samantha is a Statistician working with the New Jersey Water Science Center Water-Quality Processes Investigation Team.
Samantha analyzes a variety of environmental data to support scientific research and decision making. Her current work involves RShiny application development, maintaining R scripts that perform low-flow estimation, flood frequency analysis, machine learning modeling, creating/maintaining data visualizations in Tableau, and a variety of statistical analyses on streamflow data. She is committed to make data-driven science clear and reliable in order to support the USGS mission to study and protect natural resources.
Professional Experience
Wrote the Code to Download and Harmonize Discrete Metals and Ancillary Data in Three Hydrologic Basins (Delaware River, Illinois River and Upper Colorado River) R script
Education and Certifications
B.S. (2017), Mathematics/Statistics, The College of New Jersey.
Science and Products
Streamflow characteristics and trends at 97 continuous-record and 719 partial-record streamflow gaging stations in New Jersey surface water during water years 1903-2017 Streamflow characteristics and trends at 97 continuous-record and 719 partial-record streamflow gaging stations in New Jersey surface water during water years 1903-2017
This U.S. Geological Survey (USGS) data release contains a geodatabase, shapefiles, and datasets that describe streamflow characteristics and trends in New Jersey surface water during water years 1903-2017. High-flow, low-flow, and durations statistics and trend results at 97 continuous-record gages are presented. Low-flow statistics at 719 partial-record gages with sufficient data for...
Concentration Data for 12 Elements of Concern Used in the Development of Surrogate Models for Estimating Elemental Concentrations in Surface Water of Three Hydrologic Basins (Delaware River, Illinois River and Upper Colorado River) Concentration Data for 12 Elements of Concern Used in the Development of Surrogate Models for Estimating Elemental Concentrations in Surface Water of Three Hydrologic Basins (Delaware River, Illinois River and Upper Colorado River)
The release of metals (or metalloids) to surface water can involve both natural and anthropogenic sources. Elevated metals concentrations can pose a risk to human health, wildlife, and ecosystem health, with the modes of toxicity and extent of risk varying as a function of the specific metal, its chemical form and the matrix with which it is associated (for example, dissolved versus...
Public supply, self-supplied domestic, irrigation, and thermoelectric water-use data from 5-year compilation datasets from 1985 to 2015 used to assess data variability and uncertainty Public supply, self-supplied domestic, irrigation, and thermoelectric water-use data from 5-year compilation datasets from 1985 to 2015 used to assess data variability and uncertainty
The U.S. Geological Survey (USGS) National Water Use Program is responsible for compiling and disseminating the Nation's water-use data. Working in cooperation with local, State, and Federal agencies, the USGS has published an estimate of water use in the United States every 5 years, beginning in 1950. These 5-year compilations contain water-use estimates that are aggregated to the...
Statistical streamflow comparison of current and historical 30-year periods for selected streams in New Jersey Statistical streamflow comparison of current and historical 30-year periods for selected streams in New Jersey
As the population of New Jersey increases, supplying adequate drinking water to meet demand remains a high priority. To better understand potential streamflow trends over time, the U.S. Geological Survey completed a study comparing low flows at continuous- and partial-record streamgages in New Jersey between a historical period (1950–79) and a current period (1990–2019). Fourteen...
Authors
Brianna Williams, Samantha Sullivan, Thomas Suro, Jerilyn V. Collenburg, Amy R. McHugh, Jennifer Shourds
Select elements of concern in surface water of three hydrologic basins (Delaware River, Illinois River, and Upper Colorado River)—Data screening for the development of spatial and temporal models Select elements of concern in surface water of three hydrologic basins (Delaware River, Illinois River, and Upper Colorado River)—Data screening for the development of spatial and temporal models
The report focuses on the screening of previously published concentration data associated with 12 elements of concern (aluminum, arsenic, cadmium, chromium, copper, iron, mercury, manganese, lead, selenium, uranium, and zinc) measured in stream surface waters of three hydrologic basins (Delaware River Basin, Illinois River Basin, and the Upper Colorado River Basin). The purpose of this...
Authors
Mark Marvin-DiPasquale, R. Blaine McCleskey, Samantha Sullivan, Jonathan Root, Serena M. Seawolf, Katherine Ransom, Susan Wherry, Evangelos Kakouros, Shaun Baesman
Streamflow characteristics and trends in New Jersey, water years 1903–2017 Streamflow characteristics and trends in New Jersey, water years 1903–2017
As New Jersey’s population density remains high, so does its requirements for water management. Understanding the streamflow conditions throughout the state and how they may have changed over time is an important part of managing the water resources within the state. The New Jersey Department of Environmental Protection has many responsibilities related to protecting the environment and...
Authors
Amy R. McHugh, Thomas Suro, Samantha Sullivan, Brianna Williams
Factors affecting uncertainty of public supply, self-supplied domestic, irrigation, and thermoelectric water-use data, 1985–2015—Evaluation of information sources, estimation methods, and data variability Factors affecting uncertainty of public supply, self-supplied domestic, irrigation, and thermoelectric water-use data, 1985–2015—Evaluation of information sources, estimation methods, and data variability
The U.S. Geological Survey (USGS) Water-Use Program is responsible for compiling and disseminating the Nation's water-use data. Working in cooperation with local, State, and Federal agencies, the USGS has collected and published national water-use estimates every 5 years, beginning in 1950. These water-use data may vary because of actual changes in water use, because of changes in...
Authors
Carol Luukkonen, Kenneth Belitz, Samantha Sullivan, Pierre Sargent
Implementation of MOVE.1, censored MOVE.1, and piecewise MOVE.1 low-flow regressions with applications at partial-record streamgaging stations in New Jersey Implementation of MOVE.1, censored MOVE.1, and piecewise MOVE.1 low-flow regressions with applications at partial-record streamgaging stations in New Jersey
The U.S. Geological Survey (USGS) uses Maintenance of Variance Extension Type 1 (MOVE.1) regression to transfer streamflows measured at long-term continuous-record streamgaging stations to partial-record (PR) streamgaging stations where intermittent base-flow measurements are available. MOVE.1 regression is used widely throughout the hydrologic community to extend historic low flows and...
Authors
Susan Colarullo, Samantha Sullivan, Amy McHugh
Concentration data for 12 elements of concern in surface water of three hydrologic basins (Delaware River, Illinois River and Upper Colorado River) – A data visualization tool Concentration data for 12 elements of concern in surface water of three hydrologic basins (Delaware River, Illinois River and Upper Colorado River) – A data visualization tool
This data visualization and exploration tool was designed as part of the USGS WMA Proxies Project. It provides surface water concentration data associated with 12 elements of concern (Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Pb, Se, U, Zn) in a geospatial framework spanning three hydrologic basins (Delaware River, Illinois River, and the Upper Colorado River).
Science and Products
Streamflow characteristics and trends at 97 continuous-record and 719 partial-record streamflow gaging stations in New Jersey surface water during water years 1903-2017 Streamflow characteristics and trends at 97 continuous-record and 719 partial-record streamflow gaging stations in New Jersey surface water during water years 1903-2017
This U.S. Geological Survey (USGS) data release contains a geodatabase, shapefiles, and datasets that describe streamflow characteristics and trends in New Jersey surface water during water years 1903-2017. High-flow, low-flow, and durations statistics and trend results at 97 continuous-record gages are presented. Low-flow statistics at 719 partial-record gages with sufficient data for...
Concentration Data for 12 Elements of Concern Used in the Development of Surrogate Models for Estimating Elemental Concentrations in Surface Water of Three Hydrologic Basins (Delaware River, Illinois River and Upper Colorado River) Concentration Data for 12 Elements of Concern Used in the Development of Surrogate Models for Estimating Elemental Concentrations in Surface Water of Three Hydrologic Basins (Delaware River, Illinois River and Upper Colorado River)
The release of metals (or metalloids) to surface water can involve both natural and anthropogenic sources. Elevated metals concentrations can pose a risk to human health, wildlife, and ecosystem health, with the modes of toxicity and extent of risk varying as a function of the specific metal, its chemical form and the matrix with which it is associated (for example, dissolved versus...
Public supply, self-supplied domestic, irrigation, and thermoelectric water-use data from 5-year compilation datasets from 1985 to 2015 used to assess data variability and uncertainty Public supply, self-supplied domestic, irrigation, and thermoelectric water-use data from 5-year compilation datasets from 1985 to 2015 used to assess data variability and uncertainty
The U.S. Geological Survey (USGS) National Water Use Program is responsible for compiling and disseminating the Nation's water-use data. Working in cooperation with local, State, and Federal agencies, the USGS has published an estimate of water use in the United States every 5 years, beginning in 1950. These 5-year compilations contain water-use estimates that are aggregated to the...
Statistical streamflow comparison of current and historical 30-year periods for selected streams in New Jersey Statistical streamflow comparison of current and historical 30-year periods for selected streams in New Jersey
As the population of New Jersey increases, supplying adequate drinking water to meet demand remains a high priority. To better understand potential streamflow trends over time, the U.S. Geological Survey completed a study comparing low flows at continuous- and partial-record streamgages in New Jersey between a historical period (1950–79) and a current period (1990–2019). Fourteen...
Authors
Brianna Williams, Samantha Sullivan, Thomas Suro, Jerilyn V. Collenburg, Amy R. McHugh, Jennifer Shourds
Select elements of concern in surface water of three hydrologic basins (Delaware River, Illinois River, and Upper Colorado River)—Data screening for the development of spatial and temporal models Select elements of concern in surface water of three hydrologic basins (Delaware River, Illinois River, and Upper Colorado River)—Data screening for the development of spatial and temporal models
The report focuses on the screening of previously published concentration data associated with 12 elements of concern (aluminum, arsenic, cadmium, chromium, copper, iron, mercury, manganese, lead, selenium, uranium, and zinc) measured in stream surface waters of three hydrologic basins (Delaware River Basin, Illinois River Basin, and the Upper Colorado River Basin). The purpose of this...
Authors
Mark Marvin-DiPasquale, R. Blaine McCleskey, Samantha Sullivan, Jonathan Root, Serena M. Seawolf, Katherine Ransom, Susan Wherry, Evangelos Kakouros, Shaun Baesman
Streamflow characteristics and trends in New Jersey, water years 1903–2017 Streamflow characteristics and trends in New Jersey, water years 1903–2017
As New Jersey’s population density remains high, so does its requirements for water management. Understanding the streamflow conditions throughout the state and how they may have changed over time is an important part of managing the water resources within the state. The New Jersey Department of Environmental Protection has many responsibilities related to protecting the environment and...
Authors
Amy R. McHugh, Thomas Suro, Samantha Sullivan, Brianna Williams
Factors affecting uncertainty of public supply, self-supplied domestic, irrigation, and thermoelectric water-use data, 1985–2015—Evaluation of information sources, estimation methods, and data variability Factors affecting uncertainty of public supply, self-supplied domestic, irrigation, and thermoelectric water-use data, 1985–2015—Evaluation of information sources, estimation methods, and data variability
The U.S. Geological Survey (USGS) Water-Use Program is responsible for compiling and disseminating the Nation's water-use data. Working in cooperation with local, State, and Federal agencies, the USGS has collected and published national water-use estimates every 5 years, beginning in 1950. These water-use data may vary because of actual changes in water use, because of changes in...
Authors
Carol Luukkonen, Kenneth Belitz, Samantha Sullivan, Pierre Sargent
Implementation of MOVE.1, censored MOVE.1, and piecewise MOVE.1 low-flow regressions with applications at partial-record streamgaging stations in New Jersey Implementation of MOVE.1, censored MOVE.1, and piecewise MOVE.1 low-flow regressions with applications at partial-record streamgaging stations in New Jersey
The U.S. Geological Survey (USGS) uses Maintenance of Variance Extension Type 1 (MOVE.1) regression to transfer streamflows measured at long-term continuous-record streamgaging stations to partial-record (PR) streamgaging stations where intermittent base-flow measurements are available. MOVE.1 regression is used widely throughout the hydrologic community to extend historic low flows and...
Authors
Susan Colarullo, Samantha Sullivan, Amy McHugh
Concentration data for 12 elements of concern in surface water of three hydrologic basins (Delaware River, Illinois River and Upper Colorado River) – A data visualization tool Concentration data for 12 elements of concern in surface water of three hydrologic basins (Delaware River, Illinois River and Upper Colorado River) – A data visualization tool
This data visualization and exploration tool was designed as part of the USGS WMA Proxies Project. It provides surface water concentration data associated with 12 elements of concern (Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Pb, Se, U, Zn) in a geospatial framework spanning three hydrologic basins (Delaware River, Illinois River, and the Upper Colorado River).