John C. Hammond, PhD
John Hammond is a Research Hydrologist for the U.S. Geological Survey, currently working at the MD-DE-DC Water Science Center in the Baltimore office.
John studies hydroclimatic variability and trends, seasonal snow dynamics, empirical streamflow relationships across scales, and incorporates satellite data into hydrologic models. Current projects include improving snow process representation in hydrologic models, characterizing hydrologic drought, developing drought early warning systems, and drivers of non-perennial flow, and DC StreamStats.
Research interests include:
- Runoff forecasting in snow-dominated watersheds
- Input partitioning through the critical zone
- Hydroclimatic and cryospheric trend detection
- Low-cost sensors for snow and streamflow monitoring
- Intermittent snow and streamflow occurrence and prediction
Consulting experience:
- Remote sensing of snow occurrence timing and distribution
- Flood innundation mapping
- Hydrologic and meteorologic equipment installation and maintenance
Professional Experience
Research Hydrologist, U.S. Geological Survey (USGS), November, 2022 to Present: Surface water hydrologist (Water Science Center, Water Mission Area)
Hydrologist, U.S. Geological Survey (USGS)
March, 2019 to November, 2022: Surface water hydrologist (Water Science Center, Water Mission Area)U.S. Geological Survey (USGS)
November, 2014 to December, 2015: Surface Water Research Contractor
Education and Certifications
2018. PhD, Geosciences: Watershed Science, Colorado State University. Dissertation: Effects of snow persistence on soil moisture and streamflow generation in mountain regions of the western U.S.
2014. M.S., Water Resources Science, Oregon State University. Thesis: Trends in streamflow above and below dams across the Columbia River Basin from 1950 to 2012: assessing sub-basin sensitivity.
2012. B.S., Environmental Science & Policy, University of Maryland, College Park. Concentration: Global Environmental Change. Citation: College Park Scholars – Environmental Studies. Cum Laude.
Science and Products
Filter Total Items: 34
Evaluating distributed snow model resolution and meteorology parameterizations against streamflow observations: Finer Is not always better Evaluating distributed snow model resolution and meteorology parameterizations against streamflow observations: Finer Is not always better
Estimating snow conditions is often done using numerical snowpack evolution models at spatial resolutions of 500 m and greater; however, snow depth in complex terrain often varies on sub-meter scales. This study investigated how the spatial distribution of simulated snow conditions varied across seven model spatial resolutions from 30 to 1,000 m and over two meteorological data sets...
Authors
Theodore B. Barnhart, Annie L. Putman, Aaron Joseph Heldmyer, David M. Rey, John C. Hammond, Jessica M. Driscoll, Graham A. Sexstone
Streamflow depletion caused by groundwater pumping: Fundamental research priorities for management-relevant science Streamflow depletion caused by groundwater pumping: Fundamental research priorities for management-relevant science
Reductions in streamflow caused by groundwater pumping, known as “streamflow depletion,” link the hydrologic process of stream-aquifer interactions to human modifications of the water cycle. Isolating the impacts of groundwater pumping on streamflow is challenging because other climate and human activities concurrently impact streamflow, making it difficult to separate individual drivers...
Authors
Samuel Zipper, Andrea E. Brookfield, Hoori Ajami, Jessica R. Ayers, Chris Beightel, Michael N. Fienen, Tom Gleeson, John C. Hammond, Mary C Hill, Anthony D Kendall, Benjamin Kerr, Dana A. Lapides, Misty Porter, S. Parimalarenganayaki, Melissa Rohde, Chloe Wardropper
Drought prediction and water availability: A report on the 2022 USGS-NIDIS National Listening Session Series Drought prediction and water availability: A report on the 2022 USGS-NIDIS National Listening Session Series
The U.S. Geological Survey (USGS) and NOAA’s National Integrated Drought Information System (NIDIS) conducted a series of four Listening Sessions in 2022 – each with a different application or topical focus – to seek input on priorities and needs related to predicting water availability changes under drought conditions at national and regional scales. This input was gathered to help...
Authors
Marina Skumanich, Erik Smith, Joel Lisonbee, John C. Hammond
Identifying hydrologic signatures associated with streamflow depletion caused by groundwater pumping Identifying hydrologic signatures associated with streamflow depletion caused by groundwater pumping
Groundwater pumping can reduce streamflow in nearby waterways (‘streamflow depletion’), a process which must be accounted for in integrated management of surface and groundwater resources. However, causal identification of streamflow depletion from hydrographs alone is challenging because pumping impacts are masked by other drivers of hydrologic variability. To identify potential...
Authors
Dana A. Lapides, Samuel Zipper, John C. Hammond
Regional streamflow drought forecasting in the Colorado River Basin using Deep Neural Network models Regional streamflow drought forecasting in the Colorado River Basin using Deep Neural Network models
Process-based, large-scale (e.g., conterminous United States [CONUS]) hydrologic models have struggled to achieve reliable streamflow drought performance in arid regions and for low-flow periods. Deep learning has recently seen broad implementation in streamflow prediction and forecasting research projects throughout the world with performance often equaling or exceeding that of process...
Authors
Scott Douglas Hamshaw, Phillip J. Goodling, Konrad Hafen, John C. Hammond, Ryan R. McShane, Roy Sando, Apoorva Ramesh Shastry, Caelan E. Simeone, David Watkins, Elaheh White, Michael Wieczorek
Groundwater recharge in northern New England: Meteorological drivers and relations with low streamflow Groundwater recharge in northern New England: Meteorological drivers and relations with low streamflow
Meteorological drivers of groundwater recharge for spring (February–June), fall (October–January), and recharge-year (October–June) recharge seasons were evaluated for northern New England and upstate New York from 1989 to 2018. Monthly groundwater recharge was computed at 21 observation wells by subtracting the water levels at the end of each month from the level of the previous month...
Authors
Caitlin Crossett, Glenn A. Hodgkins, Hadley Menk, Lesley-Ann L. Dupigny-Giroux, Robert W. Dudley, Mary D. Lemcke-Stampone, John C. Hammond
High resolution SnowModel simulations reveal future elevation-dependent snow loss and earlier, flashier surface water input for the Upper Colorado River Basin High resolution SnowModel simulations reveal future elevation-dependent snow loss and earlier, flashier surface water input for the Upper Colorado River Basin
Continued climate warming is reducing seasonal snowpacks in the western United States, where >50% of historical water supplies were snowmelt-derived. In the Upper Colorado River Basin, declining snow water equivalent (SWE) and altered surface water input (SWI, rainfall and snowmelt available to enter the soil) timing and magnitude affect streamflow generation and water availability. To...
Authors
John C. Hammond, Graham A. Sexstone, Annie L. Putman, Theodore B. Barnhart, David M. Rey, Jessica M. Driscoll, Glen Liston, Kristen L. Rasmussen, Daniel McGrath, Steven R. Fassnacht, Stephanie K. Kampf
Causes, responses, and implications of anthropogenic versus natural flow intermittence in river networks Causes, responses, and implications of anthropogenic versus natural flow intermittence in river networks
Rivers that do not flow year-round are the predominant type of running waters on Earth. Despite a burgeoning literature on natural flow intermittence (NFI), knowledge about the hydrological causes and ecological effects of human-induced, anthropogenic flow intermittence (AFI) remains limited. NFI and AFI could generate contrasting hydrological and biological responses in rivers because...
Authors
Thibault Datry, Amelie Truchy, Julian D. Olden, Michelle H. Busch, Rachel Stubbington, Walter K. Dodds, Sam Zipper, Songyan Yu, Mathis L. Messager, Jonathan D. Tonkin, Kendra E. Kaiser, John C. Hammond, E.K. Moody, Ryan Burrows, Romain Sarremejane, Amanda DelVecchia, Megan L. Fork, Chelsea Little, Richard H Walker, Annika W. Walters, Daniel C. Allen
Spatial patterns and seasonal timing of increasing riverine specific conductance from 1998 to 2018 suggest legacy contamination in the Delaware River Basin Spatial patterns and seasonal timing of increasing riverine specific conductance from 1998 to 2018 suggest legacy contamination in the Delaware River Basin
Increasing salinization of freshwater threatens water supplies that support a range of human and ecological uses. The latest assessments of Delaware River Basin (DRB) surface-water-quality changes indicate widespread salinization has occurred in recent decades, which may lead to meaningful degradation in water quality. To better understand how and when salinity transport occurs and...
Authors
Christine Rumsey, John C. Hammond, Jennifer C. Murphy, Megan E. Shoda, Alexander M. Soroka
Going beyond low flows: Streamflow drought deficit and duration illuminate distinct spatiotemporal drought patterns and trends in the U.S. during the last century Going beyond low flows: Streamflow drought deficit and duration illuminate distinct spatiotemporal drought patterns and trends in the U.S. during the last century
Streamflow drought is a recurring challenge, and understanding spatiotemporal patterns of past droughts is needed to manage future water resources. We examined regional patterns in streamflow drought metrics and compared these metrics to low flow timing and magnitude using long-term daily records for 555 minimally disturbed watersheds. For each streamgage, we calculated streamflow...
Authors
John C. Hammond, Caelan E. Simeone, Jory Seth Hecht, Glenn A. Hodgkins, Melissa A. Lombard, Gregory J. McCabe, David M. Wolock, Michael Wieczorek, Carolyn G Olson, Todd Caldwell, Robert W. Dudley, Adam N. Price
Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA
Building continental-scale hydrologic models in data-sparse regions requires an understanding of spatial variation in hydrologic processes. Extending these models to ungaged locations requires techniques to group ungaged locations with gaged ones to make process importance and model parameter transfer decisions to ungaged locations. This analysis (1) tested the utility of fundamental...
Authors
Theodore B. Barnhart, William H. Farmer, John C. Hammond, Graham A. Sexstone, Janet H. Curran, Joshua C. Koch, Jessica M. Driscoll
Assessing placement bias of the global river gauge network Assessing placement bias of the global river gauge network
Knowing where and when rivers flow is paramount to managing freshwater ecosystems. Yet stream gauging stations are distributed sparsely across rivers globally and may not capture the diversity of fluvial network properties and anthropogenic influences. Here we evaluate the placement bias of a global stream gauge dataset on its representation of socioecological, hydrologic, climatic and
Authors
Corey Krabbenhoft, George H. Allen, Peirong Lin, Sarah E Godsey, Daniel C. Allen, Ryan Burrows, Amanda DelVecchia, Ken M. Fritz, Margaret Shanafield, Amy J. Burgin, Margaret Zimmer, Thibault Datry, Walter K. Dodds, C. Nathan Jones, Meryl Mimms, Catherin Franklin, John C. Hammond, Samuel Zipper, Adam S Ward, Katie H. Costigan, Hylke Beck, Julian D. Olden
Filter Total Items: 25
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 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
This data release makes available three data tables supporting a spatiotemporal analysis of riverine conductivity and streamflow trends within the Delaware River Basin. The listed datasets include baseflow and total flow time series for selected gaged basins, watershed attributes, water quality information and trend analysis results.
High Resolution Current and Future Climate SnowModel Simulations in the Upper Colorado River Basin High Resolution Current and Future Climate SnowModel Simulations in the Upper Colorado River Basin
This data release contains SnowModel snow evolution simulation output on a 100-meter (m) geospatial grid for a 311 kilometer (km) × 300 km model domain in Colorado, United States, encompassing the Colorado and Gunnison River Basin headwaters in the Upper Colorado River Basin. Weather Research and Forecasting (WRF) Model convection-permitting and orography-resolving (4-km grid spacing)...
U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-, 1951- and 1981-2020 (ver. 1.1, August 2025) U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-, 1951- and 1981-2020 (ver. 1.1, August 2025)
This dataset contains annual flow metrics quantifying drought and low streamflows for USGS GAGES-2 gages in the contiguous U.S. satisfying data completeness checks for the periods 1921-2020, 1951-2020, and 1981-2020. The dataset also contains annual climate variables from the USGS Monthly Water Balance Model (MWBM). The dataset provides trend analysis outputs for annual drought and low...
Basin Characteristics and Streamflow Statistics for Selected Gages, Alaska, USA (ver. 2.0, September, 2022) Basin Characteristics and Streamflow Statistics for Selected Gages, Alaska, USA (ver. 2.0, September, 2022)
This data release documents the data used for the associated publication "Evaluating hydrologic region assignment techniques for ungaged watersheds in Alaska, USA" (Barnhart and others, 2022) The data sets within this release are stored in 14 files: (1) Streamflow observations and sites used. (2) Statistically estimated streamflow values computed for each site. (3) Streamflow statistics...
PeakFQ inputs and selected outputs for selected gages in or near Delaware PeakFQ inputs and selected outputs for selected gages in or near Delaware
This data release contains input and output files for PeakFQ models for 122 selected streamgages in or near Delaware. For each PeakFQ model, we provide the input peak flow file (.txt), peak flow specification file (.psf), model outputs in the form of .PRT and .EXP files, and a plot of peak flow estimates with fit relationship (.EMF). The PeakFQ models provided are for the weighted skew...
Magnitude and Frequency of Peak Flows and Low Flows on Nontidal Streams in Delaware: peak and low flow estimates and basin characteristics Magnitude and Frequency of Peak Flows and Low Flows on Nontidal Streams in Delaware: peak and low flow estimates and basin characteristics
This dataset contains four tables: (1) site, regression and weighted peak flow estimates (peak_flow_estimates.csv) (2) site, regression and weighted low flow estimates (low_flow_estimates.csv) (3) basin characteristics for peak flow sites (peak_basin_stats.csv) (4) basin characteristics for low flow sites (low_basin_stats.csv). These tables support the USGS report "Magnitude and...
Contiguous U.S. annual snow persistence and trends from 2001-2020 Contiguous U.S. annual snow persistence and trends from 2001-2020
Snow persistence (SP) or the snow cover index (SCI), is the fraction of time that snow is present on the ground for a defined period. Cloud covered index (CCI) is the fraction of time that there is no data, cloud, or sensor saturation for the same period. SP and CCI were calculated on a pixel by pixel basis using MODIS/Terra Snow Cover 8-Day L3 Global 500m Grid, Collection 6 obtained...
National Hydrologic Model Alaska Domain parameter database, version 1 National Hydrologic Model Alaska Domain parameter database, version 1
This data release contains input data for hydrologic simulations of the Alaska Domain application of the U.S. Geological Survey (USGS) Precipitation Runoff Modelling System (PRMS) as implemented in the National Hydrologic Model (NHM) infrastructure (Regan and others, 2018). The NHM Alaska Domain parameter database consists of 114 parameter files in ASCII format (CSV), two files needed to...
Annual low flow, climate and watershed properties for 325 USGS gages in and near the Delaware River Basin Annual low flow, climate and watershed properties for 325 USGS gages in and near the Delaware River Basin
This dataset contains annual metrics quantifying low streamflows, climate, topography, land cover and geology for 325 USGS GAGES-2 watersheds within the Delaware River Basin boundary or with watershed centroids within a 25-mile buffer of the Delaware River Basin boundary.
Mean annual no flow, climate and watershed properties for 540 non-perennial USGS gages in the contiguous U.S. Mean annual no flow, climate and watershed properties for 540 non-perennial USGS gages in the contiguous U.S.
This dataset contains mean-annual metrics quantifying intermittent streamflow, climate, topography, land cover and geology for 540 USGS GAGES-2 watersheds experiencing non-perennial flow.
Geospatial Fabric for the National Hydrologic Model Alaska Domain, version 1 Geospatial Fabric for the National Hydrologic Model Alaska Domain, version 1
This metadata record documents a geospatial dataset for the U.S. Geological Survey Precipitation Runoff Modeling System (PRMS) used to drive the National Hydrologic Model (NHM). The Alaska Geospatial Fabric v1 is the spatial representation of the hydrologic response units (HRUs) used for the PRMS NHM Alaska domain. These HRUs were generated using the twelve-digit Hydrologic Unit Code...
Sub-annual streamflow responses to rainfall and snowmelt inputs in snow-dominated watersheds of the western U.S. Sub-annual streamflow responses to rainfall and snowmelt inputs in snow-dominated watersheds of the western U.S.
The data presented here contain quasi-event hydrologic response characteristics for quickflow response intervals (QRIs) calculated at 57 USGS GAGES-II reference watersheds in the western US. Each row in the attached csv contains characteristics for an individual QRI at one site. QRI characteristics include duration, antecedent flow, input, input rate,peak flow, potential...
Science and Products
Filter Total Items: 34
Evaluating distributed snow model resolution and meteorology parameterizations against streamflow observations: Finer Is not always better Evaluating distributed snow model resolution and meteorology parameterizations against streamflow observations: Finer Is not always better
Estimating snow conditions is often done using numerical snowpack evolution models at spatial resolutions of 500 m and greater; however, snow depth in complex terrain often varies on sub-meter scales. This study investigated how the spatial distribution of simulated snow conditions varied across seven model spatial resolutions from 30 to 1,000 m and over two meteorological data sets...
Authors
Theodore B. Barnhart, Annie L. Putman, Aaron Joseph Heldmyer, David M. Rey, John C. Hammond, Jessica M. Driscoll, Graham A. Sexstone
Streamflow depletion caused by groundwater pumping: Fundamental research priorities for management-relevant science Streamflow depletion caused by groundwater pumping: Fundamental research priorities for management-relevant science
Reductions in streamflow caused by groundwater pumping, known as “streamflow depletion,” link the hydrologic process of stream-aquifer interactions to human modifications of the water cycle. Isolating the impacts of groundwater pumping on streamflow is challenging because other climate and human activities concurrently impact streamflow, making it difficult to separate individual drivers...
Authors
Samuel Zipper, Andrea E. Brookfield, Hoori Ajami, Jessica R. Ayers, Chris Beightel, Michael N. Fienen, Tom Gleeson, John C. Hammond, Mary C Hill, Anthony D Kendall, Benjamin Kerr, Dana A. Lapides, Misty Porter, S. Parimalarenganayaki, Melissa Rohde, Chloe Wardropper
Drought prediction and water availability: A report on the 2022 USGS-NIDIS National Listening Session Series Drought prediction and water availability: A report on the 2022 USGS-NIDIS National Listening Session Series
The U.S. Geological Survey (USGS) and NOAA’s National Integrated Drought Information System (NIDIS) conducted a series of four Listening Sessions in 2022 – each with a different application or topical focus – to seek input on priorities and needs related to predicting water availability changes under drought conditions at national and regional scales. This input was gathered to help...
Authors
Marina Skumanich, Erik Smith, Joel Lisonbee, John C. Hammond
Identifying hydrologic signatures associated with streamflow depletion caused by groundwater pumping Identifying hydrologic signatures associated with streamflow depletion caused by groundwater pumping
Groundwater pumping can reduce streamflow in nearby waterways (‘streamflow depletion’), a process which must be accounted for in integrated management of surface and groundwater resources. However, causal identification of streamflow depletion from hydrographs alone is challenging because pumping impacts are masked by other drivers of hydrologic variability. To identify potential...
Authors
Dana A. Lapides, Samuel Zipper, John C. Hammond
Regional streamflow drought forecasting in the Colorado River Basin using Deep Neural Network models Regional streamflow drought forecasting in the Colorado River Basin using Deep Neural Network models
Process-based, large-scale (e.g., conterminous United States [CONUS]) hydrologic models have struggled to achieve reliable streamflow drought performance in arid regions and for low-flow periods. Deep learning has recently seen broad implementation in streamflow prediction and forecasting research projects throughout the world with performance often equaling or exceeding that of process...
Authors
Scott Douglas Hamshaw, Phillip J. Goodling, Konrad Hafen, John C. Hammond, Ryan R. McShane, Roy Sando, Apoorva Ramesh Shastry, Caelan E. Simeone, David Watkins, Elaheh White, Michael Wieczorek
Groundwater recharge in northern New England: Meteorological drivers and relations with low streamflow Groundwater recharge in northern New England: Meteorological drivers and relations with low streamflow
Meteorological drivers of groundwater recharge for spring (February–June), fall (October–January), and recharge-year (October–June) recharge seasons were evaluated for northern New England and upstate New York from 1989 to 2018. Monthly groundwater recharge was computed at 21 observation wells by subtracting the water levels at the end of each month from the level of the previous month...
Authors
Caitlin Crossett, Glenn A. Hodgkins, Hadley Menk, Lesley-Ann L. Dupigny-Giroux, Robert W. Dudley, Mary D. Lemcke-Stampone, John C. Hammond
High resolution SnowModel simulations reveal future elevation-dependent snow loss and earlier, flashier surface water input for the Upper Colorado River Basin High resolution SnowModel simulations reveal future elevation-dependent snow loss and earlier, flashier surface water input for the Upper Colorado River Basin
Continued climate warming is reducing seasonal snowpacks in the western United States, where >50% of historical water supplies were snowmelt-derived. In the Upper Colorado River Basin, declining snow water equivalent (SWE) and altered surface water input (SWI, rainfall and snowmelt available to enter the soil) timing and magnitude affect streamflow generation and water availability. To...
Authors
John C. Hammond, Graham A. Sexstone, Annie L. Putman, Theodore B. Barnhart, David M. Rey, Jessica M. Driscoll, Glen Liston, Kristen L. Rasmussen, Daniel McGrath, Steven R. Fassnacht, Stephanie K. Kampf
Causes, responses, and implications of anthropogenic versus natural flow intermittence in river networks Causes, responses, and implications of anthropogenic versus natural flow intermittence in river networks
Rivers that do not flow year-round are the predominant type of running waters on Earth. Despite a burgeoning literature on natural flow intermittence (NFI), knowledge about the hydrological causes and ecological effects of human-induced, anthropogenic flow intermittence (AFI) remains limited. NFI and AFI could generate contrasting hydrological and biological responses in rivers because...
Authors
Thibault Datry, Amelie Truchy, Julian D. Olden, Michelle H. Busch, Rachel Stubbington, Walter K. Dodds, Sam Zipper, Songyan Yu, Mathis L. Messager, Jonathan D. Tonkin, Kendra E. Kaiser, John C. Hammond, E.K. Moody, Ryan Burrows, Romain Sarremejane, Amanda DelVecchia, Megan L. Fork, Chelsea Little, Richard H Walker, Annika W. Walters, Daniel C. Allen
Spatial patterns and seasonal timing of increasing riverine specific conductance from 1998 to 2018 suggest legacy contamination in the Delaware River Basin Spatial patterns and seasonal timing of increasing riverine specific conductance from 1998 to 2018 suggest legacy contamination in the Delaware River Basin
Increasing salinization of freshwater threatens water supplies that support a range of human and ecological uses. The latest assessments of Delaware River Basin (DRB) surface-water-quality changes indicate widespread salinization has occurred in recent decades, which may lead to meaningful degradation in water quality. To better understand how and when salinity transport occurs and...
Authors
Christine Rumsey, John C. Hammond, Jennifer C. Murphy, Megan E. Shoda, Alexander M. Soroka
Going beyond low flows: Streamflow drought deficit and duration illuminate distinct spatiotemporal drought patterns and trends in the U.S. during the last century Going beyond low flows: Streamflow drought deficit and duration illuminate distinct spatiotemporal drought patterns and trends in the U.S. during the last century
Streamflow drought is a recurring challenge, and understanding spatiotemporal patterns of past droughts is needed to manage future water resources. We examined regional patterns in streamflow drought metrics and compared these metrics to low flow timing and magnitude using long-term daily records for 555 minimally disturbed watersheds. For each streamgage, we calculated streamflow...
Authors
John C. Hammond, Caelan E. Simeone, Jory Seth Hecht, Glenn A. Hodgkins, Melissa A. Lombard, Gregory J. McCabe, David M. Wolock, Michael Wieczorek, Carolyn G Olson, Todd Caldwell, Robert W. Dudley, Adam N. Price
Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA
Building continental-scale hydrologic models in data-sparse regions requires an understanding of spatial variation in hydrologic processes. Extending these models to ungaged locations requires techniques to group ungaged locations with gaged ones to make process importance and model parameter transfer decisions to ungaged locations. This analysis (1) tested the utility of fundamental...
Authors
Theodore B. Barnhart, William H. Farmer, John C. Hammond, Graham A. Sexstone, Janet H. Curran, Joshua C. Koch, Jessica M. Driscoll
Assessing placement bias of the global river gauge network Assessing placement bias of the global river gauge network
Knowing where and when rivers flow is paramount to managing freshwater ecosystems. Yet stream gauging stations are distributed sparsely across rivers globally and may not capture the diversity of fluvial network properties and anthropogenic influences. Here we evaluate the placement bias of a global stream gauge dataset on its representation of socioecological, hydrologic, climatic and
Authors
Corey Krabbenhoft, George H. Allen, Peirong Lin, Sarah E Godsey, Daniel C. Allen, Ryan Burrows, Amanda DelVecchia, Ken M. Fritz, Margaret Shanafield, Amy J. Burgin, Margaret Zimmer, Thibault Datry, Walter K. Dodds, C. Nathan Jones, Meryl Mimms, Catherin Franklin, John C. Hammond, Samuel Zipper, Adam S Ward, Katie H. Costigan, Hylke Beck, Julian D. Olden
Filter Total Items: 25
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 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
This data release makes available three data tables supporting a spatiotemporal analysis of riverine conductivity and streamflow trends within the Delaware River Basin. The listed datasets include baseflow and total flow time series for selected gaged basins, watershed attributes, water quality information and trend analysis results.
High Resolution Current and Future Climate SnowModel Simulations in the Upper Colorado River Basin High Resolution Current and Future Climate SnowModel Simulations in the Upper Colorado River Basin
This data release contains SnowModel snow evolution simulation output on a 100-meter (m) geospatial grid for a 311 kilometer (km) × 300 km model domain in Colorado, United States, encompassing the Colorado and Gunnison River Basin headwaters in the Upper Colorado River Basin. Weather Research and Forecasting (WRF) Model convection-permitting and orography-resolving (4-km grid spacing)...
U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-, 1951- and 1981-2020 (ver. 1.1, August 2025) U.S. Streamflow Drought During the Last Century: annual drought and low flow metrics, annual climate, and trends for the periods 1921-, 1951- and 1981-2020 (ver. 1.1, August 2025)
This dataset contains annual flow metrics quantifying drought and low streamflows for USGS GAGES-2 gages in the contiguous U.S. satisfying data completeness checks for the periods 1921-2020, 1951-2020, and 1981-2020. The dataset also contains annual climate variables from the USGS Monthly Water Balance Model (MWBM). The dataset provides trend analysis outputs for annual drought and low...
Basin Characteristics and Streamflow Statistics for Selected Gages, Alaska, USA (ver. 2.0, September, 2022) Basin Characteristics and Streamflow Statistics for Selected Gages, Alaska, USA (ver. 2.0, September, 2022)
This data release documents the data used for the associated publication "Evaluating hydrologic region assignment techniques for ungaged watersheds in Alaska, USA" (Barnhart and others, 2022) The data sets within this release are stored in 14 files: (1) Streamflow observations and sites used. (2) Statistically estimated streamflow values computed for each site. (3) Streamflow statistics...
PeakFQ inputs and selected outputs for selected gages in or near Delaware PeakFQ inputs and selected outputs for selected gages in or near Delaware
This data release contains input and output files for PeakFQ models for 122 selected streamgages in or near Delaware. For each PeakFQ model, we provide the input peak flow file (.txt), peak flow specification file (.psf), model outputs in the form of .PRT and .EXP files, and a plot of peak flow estimates with fit relationship (.EMF). The PeakFQ models provided are for the weighted skew...
Magnitude and Frequency of Peak Flows and Low Flows on Nontidal Streams in Delaware: peak and low flow estimates and basin characteristics Magnitude and Frequency of Peak Flows and Low Flows on Nontidal Streams in Delaware: peak and low flow estimates and basin characteristics
This dataset contains four tables: (1) site, regression and weighted peak flow estimates (peak_flow_estimates.csv) (2) site, regression and weighted low flow estimates (low_flow_estimates.csv) (3) basin characteristics for peak flow sites (peak_basin_stats.csv) (4) basin characteristics for low flow sites (low_basin_stats.csv). These tables support the USGS report "Magnitude and...
Contiguous U.S. annual snow persistence and trends from 2001-2020 Contiguous U.S. annual snow persistence and trends from 2001-2020
Snow persistence (SP) or the snow cover index (SCI), is the fraction of time that snow is present on the ground for a defined period. Cloud covered index (CCI) is the fraction of time that there is no data, cloud, or sensor saturation for the same period. SP and CCI were calculated on a pixel by pixel basis using MODIS/Terra Snow Cover 8-Day L3 Global 500m Grid, Collection 6 obtained...
National Hydrologic Model Alaska Domain parameter database, version 1 National Hydrologic Model Alaska Domain parameter database, version 1
This data release contains input data for hydrologic simulations of the Alaska Domain application of the U.S. Geological Survey (USGS) Precipitation Runoff Modelling System (PRMS) as implemented in the National Hydrologic Model (NHM) infrastructure (Regan and others, 2018). The NHM Alaska Domain parameter database consists of 114 parameter files in ASCII format (CSV), two files needed to...
Annual low flow, climate and watershed properties for 325 USGS gages in and near the Delaware River Basin Annual low flow, climate and watershed properties for 325 USGS gages in and near the Delaware River Basin
This dataset contains annual metrics quantifying low streamflows, climate, topography, land cover and geology for 325 USGS GAGES-2 watersheds within the Delaware River Basin boundary or with watershed centroids within a 25-mile buffer of the Delaware River Basin boundary.
Mean annual no flow, climate and watershed properties for 540 non-perennial USGS gages in the contiguous U.S. Mean annual no flow, climate and watershed properties for 540 non-perennial USGS gages in the contiguous U.S.
This dataset contains mean-annual metrics quantifying intermittent streamflow, climate, topography, land cover and geology for 540 USGS GAGES-2 watersheds experiencing non-perennial flow.
Geospatial Fabric for the National Hydrologic Model Alaska Domain, version 1 Geospatial Fabric for the National Hydrologic Model Alaska Domain, version 1
This metadata record documents a geospatial dataset for the U.S. Geological Survey Precipitation Runoff Modeling System (PRMS) used to drive the National Hydrologic Model (NHM). The Alaska Geospatial Fabric v1 is the spatial representation of the hydrologic response units (HRUs) used for the PRMS NHM Alaska domain. These HRUs were generated using the twelve-digit Hydrologic Unit Code...
Sub-annual streamflow responses to rainfall and snowmelt inputs in snow-dominated watersheds of the western U.S. Sub-annual streamflow responses to rainfall and snowmelt inputs in snow-dominated watersheds of the western U.S.
The data presented here contain quasi-event hydrologic response characteristics for quickflow response intervals (QRIs) calculated at 57 USGS GAGES-II reference watersheds in the western US. Each row in the attached csv contains characteristics for an individual QRI at one site. QRI characteristics include duration, antecedent flow, input, input rate,peak flow, potential...