Dudley, R.W., Panchang, V.G., and Newell, C.R., 2000. Application of a comprehensive modeling strategy for the management of net-pen aquaculture waste transport: Aquaculture, Elsevier Science, (187) 3-4 (2000) p. 319-349.
Robert Dudley
Biography
My work experience with the USGS includes investigation of climate-related hydrologic trends, watershed rainfall-runoff modeling, hydraulic modeling, statistical modeling, eco-hydrologic assessments, riverine and lacustrine sediment mapping, and public-water-supply water budgets. Ongoing and recent work includes: documenting historical long-term trends and modeling of future climate-related changes in streamflow and groundwater; development of national streamflow and groundwater climate change indicators in cooperation with USEPA; investigation of statistical methods for forecasting groundwater levels in the U.S.; investigation of trends in low flows and flood flows across the U.S.; and researching methods for computing river flows using satellite imagery and altimetry data.
Science and Products
Date published: May 17, 2018
Status: Active Trend Reproduction
As part of the National Water Budget Project, our objective is to quantify how well observed trends are simulated.
Date published: May 17, 2018
Status: Active HBMI PRMS Project
This project will provide a deterministic watershed model of the Meduxnekeag River watershed with a capacity to model water-temperatures capable of simulating future hydrologic and temperature changes based on projected climate estimates.
Contacts: Robert Dudley
Date published: May 16, 2018
Status: Active EPA National Low Flows
Low streamflow has great ecological importance as it defines the minimum extent (and carrying capacity) of in-stream habitat and affects biota composition and distribution, and species trophic structure.
Contacts: Robert Dudley, Julie Kiang
Date published: October 1, 2015
Status: Active Hydrologic Climate Change Indicators
Background Streams and rivers are an important environmental resource and provide water for many human needs. Streamflow is a measure of the volume of water carried by rivers and streams. Changes in streamflow can directly influence the supply of water available for human consumption, irrigation, generating electricity, and other needs. In addition, many plants and animals depend on...
Date published: November 7, 2013
Status: Active Webinar: Historical Trends in Summer Precipitation, Baseflows, and Stormflows in New England and Projections of Seasonal Streamflows for Coastal Streams in Maine
Check out this webinar for more information on influencing water flow in Maine rivers and streams.
Contacts: Robert Dudley, Glenn A Hodgkins
Attribution: Climate Adaptation Science Centers
Date published: January 1, 2008
Status: Completed Impact of Changes in Streamflow and Temperature on Endangered Atlantic Salmon
Coastal rivers draining into the Gulf of Maine are home to the endangered Gulf of Maine Distinct Population Segment of Atlantic salmon. The Gulf of Maine population began to decline significantly by the late 19th century, leading to the closure of the commercial Atlantic salmon fishery in 1948. In recent years, populations have again begun to decrease again. State and federal fisheries...
Contacts: Robert Dudley, Glenn A Hodgkins
Attribution: Climate Adaptation Science Centers
Year Published: 2020
Comparing trends in modeled and observed streamflows at minimally altered basins in the United States
We compared modeled and observed streamflow trends from 1984–2016 using five statistical transfer models and one deterministic, distributed-parameter, process-based model, for 26 flow metrics at 502 basins in the United States that are minimally influenced by development. We also looked at a measure of overall model fit and average bias. A higher...
Hodgkins, Glenn A.; Dudley, Robert; Russell, Amy M.; LaFontaine, Jacob H.
Year Published: 2020
Change points in annual peak streamflows: Method comparisons and historical change points in the United States
Change-point, or step-trend, detection is an active area of research in statistics and an area of great interest in hydrology because change points may be evidence of natural or anthropogenic changes in climatic, hydrologic, or landscape processes. A common change-point technique is the Pettitt test; however, many change-point methods are now...
Ryberg, Karen R.; Hodgkins, Glenn A.; Dudley, RobertAttribution: Water Resources
Year Published: 2020
Low streamflow trends at human-impacted and reference basins in the United States
We present a continent-scale exploration of trends in annual 7-day low streamflows at 2482 U.S. Geological Survey streamgages across the conterminous United States over the past 100, 75, and 50 years (1916–2015, 1941–2015 and 1966–2015). We used basin characteristics to identify subsets of study basins representative of reference basins with...
Dudley, Robert; Hirsch, Robert M.; Archfield, Stacey A.; Blum, Annalise G.; Renard, Benjamin
Year Published: 2019
Drought forecasting for streams and groundwaters in northeastern United States
BackgroundWhen rainfall is lower than normal over an extended period, streamflows decline, groundwater levels fall, and hydrological drought can occur. Droughts can reduce the water available for societal needs, such as public and private drinking-water supplies, farming, and industry, and for ecological health, such as maintenance of water...
Austin, Samuel H.; Dudley, Robert W.Attribution: Water, Maryland-Delaware-D.C. Water Science Center, New England Water Science Center, New Jersey Water Science Center, New York Water Science Center, Pennsylvania Water Science Center, Virginia and West Virginia Water Science Center, Water Resources, United States of America
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Austin, S.H., and Dudley, R.W., 2019, Drought forecasting for streams and groundwaters in northeastern United States: U.S. Geological Survey Fact Sheet 2019–3015, 4 p., https://doi.org/10.3133/fs20193015.
Year Published: 2017
Generalized hydrogeologic framework and groundwater budget for a groundwater availability study for the glacial aquifer system of the United States
The glacial aquifer system groundwater availability study seeks to quantify (1) the status of groundwater resources in the glacial aquifer system, (2) how these resources have changed over time, and (3) likely system response to future changes in anthropogenic and environmental conditions. The glacial aquifer system extends from Maine to Alaska,...
Reeves, Howard W.; Bayless, E. Randall; Dudley, Robert W.; Feinstein, Daniel T.; Fienen, Michael N.; Hoard, Christopher J.; Hodgkins, Glenn A.; Qi, Sharon L.; Roth, Jason L.; Trost, Jared J.Attribution: Geology, Water, Colorado Water Science Center, Michigan Water Science Center, Michigan-Ohio Water Science Center, Minnesota Water Science Center, New England Water Science Center, Ohio-Kentucky-Indiana Water Science Center, Upper Midwest Water Science Center, , Upper Midwest Environmental Sciences Center, Water Resources, , Region 4: Mississippi Basin, Region 7: Upper Colorado Basin, Region 1: North Atlantic-Appalachian, Ohio, United States of America
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Reeves, H.W., Bayless, E.R., Dudley, R.W., Feinstein, D.T., Fienen, M.N., Hoard, C.J., Hodgkins, G.A., Qi, S.L., Roth, J.L., and Trost, J.J., 2017, Generalized hydrogeologic framework and groundwater budget for a groundwater availability study for the glacial aquifer system of the United States: U.S. Geological Survey Scientific Investigations Report 2017–5015, 49 p., https://doi.org/10.3133/sir20175015.
Year Published: 2017
Groundwater-level trends in the U.S. glacial aquifer system, 1964-2013
The glacial aquifer system in the United States is a major source of water supply but previous work on historical groundwater trends across the system is lacking. Trends in annual minimum, mean, and maximum groundwater levels for 205 monitoring wells were analyzed across three regions of the system (East, Central, West Central) for four time...
Hodgkins, Glenn A.; Dudley, Robert W.; Nielsen, Martha G.; Renard, Benjamin; Qi, Sharon L.Attribution: New England Water Science Center, Water Resources, , Region 4: Mississippi Basin, Region 1: North Atlantic-Appalachian
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Hodgkins, G.A., Dudley, R.W., Nielsen, M.G., Renard, B. and Qi, S.L., 2017, Groundwater-level trends in the US glacial aquifer system, 1964-2013: Journal of Hydrology, v. 553, p. 289-303.
Year Published: 2017
Forecasting the probability of future groundwater levels declining below specified low thresholds in the conterminous U.S.
We present a logistic regression approach for forecasting the probability of future groundwater levels declining or maintaining below specific groundwater-level thresholds. We tested our approach on 102 groundwater wells in different climatic regions and aquifers of the United States that are part of the U.S. Geological Survey Groundwater Climate...
Dudley, Robert W.; Hodgkins, Glenn A.; Dickinson, Jesse E.Attribution: New England Water Science Center, Water Resources, Groundwater and Streamflow Information Program, , Region 4: Mississippi Basin, Region 1: North Atlantic-Appalachian, United States of America
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Dudley, Robert W., Glenn A. Hodgkins, and Jesse E. Dickinson, 2017. Forecasting the Probability of Future Groundwater Levels Declining Below Specified Low Thresholds in the Conterminous U.S. Journal of the American Water Resources Association (JAWRA) 1-13.
Year Published: 2017
Trends in snowmelt-related streamflow timing in the conterminous United States
Changes in snowmelt-related streamflow timing have implications for water availability and use as well as ecologically relevant shifts in streamflow. Historical trends in snowmelt-related streamflow timing (winter-spring center volume date, WSCVD) were computed for minimally disturbed river basins in the conterminous United States. WSCVD was...
Dudley, Robert W.; Hodgkins, Glenn A.; McHale, Michael; Kolian, Michael J.; Renard, BenjaminAttribution: New England Water Science Center, Water Resources, , Region 4: Mississippi Basin, Region 1: North Atlantic-Appalachian
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Dudley, R.W., Hodgkins, G.A., McHale, M.R., Kolian, M.J., and Renard, B., 2017, Trends in snowmelt-related streamflow timing in the conterminous United States: Journal of Hydrology, v. 547, p. 208-221. http://dx.doi.org/10.1016/j.jhydrol.2017.01.051
Year Published: 2016
Winter-spring streamflow volume and timing data for 75 Hydroclimatic Data Network-2009 basins in the conterminous United States 1920-2014
This dataset contains gage information for 75 Hydroclimatic Data Network-2009 basins in the conterminous United States and associated annual runoff volume, winter-spring runoff volume, and winter-spring runoff timing data 1920-2014, as well as trend results for WSCVD and WSV for periods 1920-2014, 1940-2014, and 1960-2014.
Dudley, Robert W.; Hodgkins, Glenn A.; McHale, Michael; Kolian, Michael J.; Renard, BenjaminAttribution: New England Water Science Center
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Dudley, R.W., Hodgkins, G.A., McHale, M.R., Kolian, M.J., and Renard, Benjamin, 2016, Winter-spring streamflow volume and timing data for 75 Hydroclimatic Data Network-2009 basins in the conterminous United States 1920-2014: U.S. Geological Survey data release, https://doi.org/10.5066/F7R78CBX.
Year Published: 2016
Streamflow
This indicator describes trends in the amount of water carried by streams across the United States, as well as the timing of runoff associated with snowmelt.
McHale, Michael; Dudley, Robert W.; Hodgkins, Glenn A.Attribution: New York Water Science Center, Water Resources
Year Published: 2015
Regression Equations for Monthly and Annual Mean and Selected Percentile Streamflows for Ungaged Rivers in Maine
In an effort to delineate hydrologic conditions in Maine, the U.S. Geological Survey, in cooperation with the Maine Department of Transportation, used streamflow data to develop dependent variables for 130 regression equations for estimating monthly and annual mean and 1, 5, 10, 25, 50, 75, 90, 95, and 99 percentile streamflows for ungaged,...
Dudley, Robert W.Attribution: , New England Water Science Center, Water Resources, , Region 1: North Atlantic-Appalachian
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Dudley, R.W., 2015, Regression equations for monthly and annual mean and selected percentile streamflows for ungaged rivers in Maine (ver. 1.1, December 21, 2015): U.S. Geological Survey Scientific Investigations Report 2015–5151, 35 p., http://dx.doi.org/10.3133/sir20155151.
Year Published: 2015
Flood-Inundation Maps for the North River in Colrain, Charlemont, and Shelburne, Massachusetts, From the Confluence of the East and West Branch North Rivers to the Deerfield River
A series of 10 digital flood-inundation maps were developed for a 3.3-mile reach of the North River in Colrain, Charlemont, and Shelburne, Massachusetts, by the U.S. Geological Survey in cooperation with the Federal Emergency Management Agency. The coverage of the maps extends from the confluence of the East and West Branch North Rivers to the...
Bent, Gardner C.; Lombard, Pamela J.; Dudley, Robert W.Attribution: New England Water Science Center, Water Resources, , Region 1: North Atlantic-Appalachian
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Bent, G.C., Lombard, P.J., and Dudley, R.W., 2015, Flood-inundation maps for the North River in Colrain, Charlemont, and Shelburne, Massachusetts, from the confluence of the East and West Branch North Rivers to the Deerfield River: U.S. Geological Survey Scientific Investigations Report 2015–5108, 16 p., appendixes, http://dx.doi.org/10.3133/sir20155108.
Pre-USGS Publications
AWATS: A Net-Pen Aquaculture Waste Transport Simulator for Management Purposes
Dudley, R.W., Panchang, V.G., Newell, C.R., 1998. AWATS: A Net-Pen Aquaculture Waste Transport Simulator for Management Purposes: Proceedings of the twenty-sixth US-Japan Aquaculture Symposium, Durham, New Hampshire, September 16-18, 1997, US-Japan Cooperative Program in Natural Resources (UJNR) Technical Report no. 26, Ed. W. H. Howell et al., NOAA Central Library Call Number: SH3 .U5 1998, pp 215-228.