Jennifer Murphy
Jenny is a hydrologist with the USGS, Central Midwest Water Science Center. Much of her work focuses on characterizing and understanding water-quality trends in the Nation's streams and rivers. Jenny also leads a team of scientists working to develop a proxy for harmful algal blooms in rivers.
Jenny has played an important role in characterizing water-quality trends with the Weighted Regressions on Time, Season and Discharge (WRTDS) model at >1,000 sites across the country using an extensive multi-agency dataset. Jenny's additional trends work includes looking at nitrate in the Mississippi River Basin, sediment in the lowermost Mississippi and Atchafalaya Rivers, and water quality in streams and rivers in the Delaware River Basin. Additionally, she has worked on projects ranging from the evaluation of best management practices in small agricultural drainages, to characterizing and understanding ecological flows, estimating water use at thermoelectric powerplants, and harmonizing multisource data. Her current interests are in trend studies, causal attribution of these trends, and exploring the influence of streamflow on water quality.
CURRENT & PAST PROJECTS
- Co-lead of multisource surface water-quality trends task as part of the IWAAs Delaware River Basin Regional Pilot
- NAWQA Surface Water Status and Trends team (Causal Analysis team lead)
- Evaluating agricultural best management practices in northwestern MS
- Ecological flows in the Cumberland and Tennessee River Basins
- Water-quality trends in the Mississippi River Basin
- Water use at thermoelectric powerplants
- Water quality in the lowermost Mississippi and Atchafalaya Rivers
Professional Experience
2020-Present, Hydrologist, USGS, Central Midwest Water Science Center, DeKalb, Illinois
2010-2020, Hydrologist, USGS, Lower Mississippi-Gulf Water Science Center, Nashville, TN
2007-2009, Project Geologist, ECS Limited, Nashville, TN
Summer 2007, Field Geologist, US Forest Service, Lewis and Clark National Forest, Great Falls, MT
2006-2007, Research Assistant, USGS, Eastern Mineral Resources, Reston, VA
Education and Certifications
M.S., Earth and Environmental Science, Vanderbilt University, Nashville, Tennessee, 2011
B.A., Geology, Lawrence University, Appleton, Wisconsin, 2006
Science and Products
Regional Water Availability Assessment: Delaware River Basin
Harmful Algal Bloom Research and Monitoring - CMWSC
Water-Quality Trends
Environmental Flow Research in the Tennessee River Basin
Modeled transport components of daily chlorophyll-a in the Illinois River, 2018 through 2020 (version 1.1, April 2024)
Data to support Leveraging machine learning to automate regression model evaluations for large multi-site water-quality trend studies
Data supporting a spatiotemporal trend analysis of specific conductivity, streamflow, and landscape attributes of selected sub-basins within the Delaware River watershed, 1980 to 2018
A national harmonized dataset of discrete chlorophyll from lakes and streams (2005-2022)
Compilation of State-Level Freshwater Harmful Algal Bloom Recreational and Drinking Water Guidelines for the Conterminous United States as of 2022
Harmonized discrete and continuous water quality data in support of modeling harmful algal blooms in the Illinois River Basin, 2005 - 2020
Datasets of Suspended Sediment Concentration and Percent Fines (1973–2021), Sampling Information (1973–2021), and Daily Streamflow (1928–2021) for Sites in the Lower Mississippi and Atchafalaya Rivers to Support Analyses of Sediment Tran
Water-quality and streamflow datasets used in Weighted Regressions on Time, Discharge, and Season (WRTDS) models to determine trends in the Nation’s rivers and streams, 1972-2017
Data to Incorporate Water Quality Analysis into Navigation Assessments as Demonstrated in the Mississippi River Basin
Water-quality trends for rivers and streams in the Delaware River Basin using Weighted Regressions on Time, Discharge, and Season (WRTDS) models, Seasonal Kendall Trend (SKT) tests, and multisource data, Water Year 1978-2018
Multi-source surface-water-quality data and U.S. Geological Survey streamgage match for the Delaware River Basin
Hydrologic event-based water-quality and streamflow data for three oxbow tributaries in northwestern Mississippi, 2007-2016
Chlorophyll a in lakes and streams of the United States (2005–2022)
Evaluation of metrics and thresholds for use in national-scale river harmful algal bloom assessments
River control points for algal productivity revealed by transport analysis
Leveraging machine learning to automate regression model evaluations for large multi-site water-quality trend studies
Differing field methods and site conditions lead to varying bias in suspended sediment concentrations in the Lower Mississippi and Atchafalaya Rivers
The "H," "A," and "B" of a HAB: A definitional framework
River water quality in the Delaware River Basin—Concentrations and trends through 2018
Water-quality trends in the Delaware River Basin calculated using multisource data and two methods for trend periods ending in 2018
Water quality of sand and gravel aquifers in McHenry County, Illinois, 2020 and comparisons to conditions in 2010
Spatial patterns and seasonal timing of increasing riverine specific conductance from 1998 to 2018 suggest legacy contamination in the Delaware River Basin
Incorporating water quality analysis into navigation assessments as demonstrated in the Mississippi River Basin
Landscape drivers of dynamic change in water quality of US rivers
Non-USGS Publications**
DOI: 10.1021/es103230n.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Tracking Water Quality in U.S. Streams and Rivers
This online graphical data tool provides USGS National Water Quality Network data, water-quality loads, and trends.
WRTDSplus: Extensions to the WRTDS method.
EGRET
Science and Products
Regional Water Availability Assessment: Delaware River Basin
Harmful Algal Bloom Research and Monitoring - CMWSC
Water-Quality Trends
Environmental Flow Research in the Tennessee River Basin
Modeled transport components of daily chlorophyll-a in the Illinois River, 2018 through 2020 (version 1.1, April 2024)
Data to support Leveraging machine learning to automate regression model evaluations for large multi-site water-quality trend studies
Data supporting a spatiotemporal trend analysis of specific conductivity, streamflow, and landscape attributes of selected sub-basins within the Delaware River watershed, 1980 to 2018
A national harmonized dataset of discrete chlorophyll from lakes and streams (2005-2022)
Compilation of State-Level Freshwater Harmful Algal Bloom Recreational and Drinking Water Guidelines for the Conterminous United States as of 2022
Harmonized discrete and continuous water quality data in support of modeling harmful algal blooms in the Illinois River Basin, 2005 - 2020
Datasets of Suspended Sediment Concentration and Percent Fines (1973–2021), Sampling Information (1973–2021), and Daily Streamflow (1928–2021) for Sites in the Lower Mississippi and Atchafalaya Rivers to Support Analyses of Sediment Tran
Water-quality and streamflow datasets used in Weighted Regressions on Time, Discharge, and Season (WRTDS) models to determine trends in the Nation’s rivers and streams, 1972-2017
Data to Incorporate Water Quality Analysis into Navigation Assessments as Demonstrated in the Mississippi River Basin
Water-quality trends for rivers and streams in the Delaware River Basin using Weighted Regressions on Time, Discharge, and Season (WRTDS) models, Seasonal Kendall Trend (SKT) tests, and multisource data, Water Year 1978-2018
Multi-source surface-water-quality data and U.S. Geological Survey streamgage match for the Delaware River Basin
Hydrologic event-based water-quality and streamflow data for three oxbow tributaries in northwestern Mississippi, 2007-2016
Chlorophyll a in lakes and streams of the United States (2005–2022)
Evaluation of metrics and thresholds for use in national-scale river harmful algal bloom assessments
River control points for algal productivity revealed by transport analysis
Leveraging machine learning to automate regression model evaluations for large multi-site water-quality trend studies
Differing field methods and site conditions lead to varying bias in suspended sediment concentrations in the Lower Mississippi and Atchafalaya Rivers
The "H," "A," and "B" of a HAB: A definitional framework
River water quality in the Delaware River Basin—Concentrations and trends through 2018
Water-quality trends in the Delaware River Basin calculated using multisource data and two methods for trend periods ending in 2018
Water quality of sand and gravel aquifers in McHenry County, Illinois, 2020 and comparisons to conditions in 2010
Spatial patterns and seasonal timing of increasing riverine specific conductance from 1998 to 2018 suggest legacy contamination in the Delaware River Basin
Incorporating water quality analysis into navigation assessments as demonstrated in the Mississippi River Basin
Landscape drivers of dynamic change in water quality of US rivers
Non-USGS Publications**
DOI: 10.1021/es103230n.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Tracking Water Quality in U.S. Streams and Rivers
This online graphical data tool provides USGS National Water Quality Network data, water-quality loads, and trends.