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Christopher Allen Mason

Chris Mason is a physical scientist at the Virginia and West Virginia Water Science Center.

Science and Products

Potomac Tributary Summary: A summary of trends in tidal water quality and associated factors, 1985 - 2022 Potomac Tributary Summary: A summary of trends in tidal water quality and associated factors, 1985 - 2022

The Potomac Tributary Summary outlines change over time for a suite of monitored tidal water quality parameters and associated potential drivers of those trends for the period of 1985 to 2022, and provides a brief description of the current state of knowledge explaining these observed changes. Water quality parameters described include surface (above pycnocline) total nitrogen (TN)...
Authors
Breck Sullivan, Kaylyn Gootman, Alex Gunnerson, Sarah Betts, Gabriel Duran, Cindy Johnson, Christopher Mason, Elgin Perry, Gopal Bhatt, Jennifer Keisman, James Webber, Jon Harcum, Michael Lane, Olivia Devereux, Qian Zhang, Rebecca Murphy, Renee Karrh, Thomas Butler, Zhaoying Wei
By
Chesapeake Bay Activities, Maryland-Delaware-D.C. Water Science Center, Virginia and West Virginia Water Science Center

Tracking status and trends in seven key indicators of river and stream condition in the Chesapeake Bay watershed Tracking status and trends in seven key indicators of river and stream condition in the Chesapeake Bay watershed

Freshwater streams and rivers are recognized as vital habitats within the Chesapeake Bay watershed, which has been undergoing extensive restoration efforts for more than 30 years. Resource managers need to understand stream and river condition and how these conditions are changing over time to determine whether regional long-term restoration and conservation goals are being met. The...
Authors
Lindsey Boyle, Samuel Austin, Matthew Cashman, Zachary Clifton, John Clune, James Colgin, Kaitlyn Elliott, Rosemary Fanelli, Ellie Foss, Nathaniel Hitt, Elizabeth Hittle, Coral Howe, Emily Majcher, Kelly Maloney, Christopher Mason, Marina Metes, Douglas Moyer, Trevor Needham, Karli Rogers, Joshua Thompson, Guoxiang Yang, Tammy Zimmerman
By
Chesapeake Bay Activities, Pennsylvania Water Science Center, Virginia and West Virginia Water Science Center

Rappahannock tributary summary: A summary of trends in tidal water quality and associated factors, 1985-2022 Rappahannock tributary summary: A summary of trends in tidal water quality and associated factors, 1985-2022

The Rappahannock Tributary Summary outlines change over time for a suite of monitored tidal water quality parameters and associated potential drivers of those trends for the period of 1985 to 2022, and provides a brief description of the current state of knowledge explaining these observed changes. Water quality parameters described include surface (above pycnocline) total nitrogen (TN)...
Authors
Breck Sullivan, Kaylyn Gootman, Alex Gunnerson, Sarah Betts, Cindy Johnson, Christopher Mason, Elgin Perry, Gopal Bhatt, Jennifer Keisman, James Webber, Jon Harcum, Michael Lane, Olivia Devereux, Qian Zhang, Rebecca Murphy, Renee Karrh, Thomas Butler, Vanessa Van Note, Angie Wei
By
Maryland-Delaware-D.C. Water Science Center

Siting considerations for satellite observation of river discharge Siting considerations for satellite observation of river discharge

With growing global capability for satellite measurement of river discharge (flow) comes a need to understand and reduce error in satellite-based discharge measurements. Satellite-based discharge estimates are based on measurements of water surface width, elevation, slope, and potentially velocity. Site selection is important for reducing error and uncertainty in both conventional and...
Authors
Jack R. Eggleston, Christopher Mason, David Bjerklie, Michael Durand, Robert W. Dudley, Merritt Harlan
By
Water Resources Mission Area, New England Water Science Center

Examining the complex relations between climate and streamflow in the mid-atlantic region of the United States Examining the complex relations between climate and streamflow in the mid-atlantic region of the United States

We explored the complex relations between climate and streamflow in the Mid-Atlantic region of the United States. In 124 watersheds across this region, we quantified spatial and temporal variation in air temperature (AT), precipitation (P), and streamflow (Q) from 1981 through 2020. Upward directional trends in monthly values of AT, P, and Q indicated an increase of 0.27–1.9 degrees...
Authors
Karen Rice, Christopher Mason, Aaron L. Mills
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

James Tributary summary: A summary of trends in tidal water quality and associated factors, 1985-2021 James Tributary summary: A summary of trends in tidal water quality and associated factors, 1985-2021

The James Tributary Summary outlines change over time for a suite of monitored tidal water quality parameters and associated potential drivers of those trends for the period 1985 – 2021 and provides a brief description of the current state of knowledge explaining these observed changes. Water quality parameters described include surface (above pycnocline) total nitrogen (TN), surface...
Authors
Breck Sullivan, Kaylyn Gootman, Alex Gunnerson, Cindy Johnson, Christopher Mason, Elgin Perry, Gopal Bhatt, Jennifer Keisman, James Webber, Jon Harcum, Mike Lane, Olivia Devereux, Qian Zhang, Rebecca Murphy, Renee Karrh, Tom Butler, Vanessa Van Note, Zhaoying Wei
By
Maryland-Delaware-D.C. Water Science Center, Virginia and West Virginia Water Science Center

Tracking status and trends in seven key indicators of stream health in the Chesapeake Bay watershed Tracking status and trends in seven key indicators of stream health in the Chesapeake Bay watershed

“The Bay Connects us, the Bay reflects us” writes Tom Horton in the book “Turning the Tide—Saving the Chesapeake Bay”. The Chesapeake Bay watershed contains the largest estuary in the United States. The watershed stretches north to Cooperstown, New York, south to Lynchburg and Virginia Beach, Virginia, west to Pendleton County, West Virginia, and east to Seaford, Delaware, and Scranton...
Authors
Samuel Austin, Matthew Cashman, John W. Clune, James Colgin, Rosemary M. Fanelli, Kevin Krause, Emily Majcher, Kelly Maloney, Christopher Mason, Douglas Moyer, Tammy M. Zimmerman
By
Ecosystems Mission Area, Water Resources Mission Area, Environmental Health Program, Chesapeake Bay Activities, Eastern Ecological Science Center, Maryland-Delaware-D.C. Water Science Center, Pennsylvania Water Science Center, South Atlantic Water Science Center (SAWSC), Virginia and West Virginia Water Science Center

Prioritizing river basins for intensive monitoring and assessment by the US Geological Survey Prioritizing river basins for intensive monitoring and assessment by the US Geological Survey

The US Geological Survey (USGS) is currently (2020) integrating its water science programs to better address the nation’s greatest water resource challenges now and into the future. This integration will rely, in part, on data from 10 or more intensively monitored river basins from across the USA. A team of USGS scientists was convened to develop a systematic, quantitative approach to...
Authors
Peter Van Metre, Sharon Qi, Jeffrey Deacon, Cheryl A. Dieter, Jessica Driscoll, Michael Fienen, Terry Kenney, Patrick Lambert, David Lesmes, Christopher Allen Mason, Anke Mueller-Solger, MaryLynn Musgrove, Jaime Painter, Donald Rosenberry, Lori Sprague, Anthony Tesoriero, Lisamarie Windham-Myers, David Wolock
By
Water Resources Mission Area, Integrated Water Availability Assessments, Wildland Fire Science

Near-field remote sensing of surface velocity and river discharge using radars and the probability concept at 10 USGS streamgages Near-field remote sensing of surface velocity and river discharge using radars and the probability concept at 10 USGS streamgages

Near-field remote sensing of surface velocity and river discharge (discharge) were measured using coherent, continuous wave Doppler and pulsed radars. Traditional streamgaging requires sensors be deployed in the water column; however, near-field remote sensing has the potential to transform streamgaging operations through non-contact methods in the U.S. Geological Survey (USGS) and other...
Authors
John Fulton, Christopher Mason, Jack R. Eggleston, Matthew Nicotra, C.-L. Chiu, Mark Henneberg, Heather Best, Jay Cederberg, Stephen Holnbeck, R. Lotspeich, Christopher Laveau, Tommaso Moramarco, Mark Jones, Jonathan Gourley, Danny Wasielewski
By
Water Resources Mission Area, Colorado Water Science Center, National Innovation Center, Pennsylvania Water Science Center

Non-USGS Publications**

McGarvey, D.J. and Mason, C.A. 2015. Re-Envisioning the Communication of our Science. Limnology and Oceanography Bulletin, 24: 1-4. https://doi.org/10.1002/lob.10007.

**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.

Hydrologic technician Fisseha Mengistu reels in a sampling bottle.

Informing Chesapeake Bay Watershed Management by Monitoring Trends in River Nutrient and Sediment Loads

The USGS has computed nutrient and suspended-sediment loads and trends through water year 2023 in Chesapeake Bay rivers. These monitoring-based estimates help federal, state, and local managers evaluate and plan water-quality restoration strategies.
By
Chesapeake Bay Activities, Maryland-Delaware-D.C. Water Science Center, Pennsylvania Water Science Center, Virginia and West Virginia Water Science Center
Informing Chesapeake Bay Watershed Management by Monitoring Trends in River Nutrient and Sediment Loads

Informing Chesapeake Bay Watershed Management by Monitoring Trends in River Nutrient and Sediment Loads

The USGS has computed nutrient and suspended-sediment loads and trends through water year 2023 in Chesapeake Bay rivers. These monitoring-based estimates help federal, state, and local managers evaluate and plan water-quality restoration strategies.
Learn More
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

USGS revises 2020 nontidal load and trend results

Issue: The USGS has revised loads and trends through 2020 from monitoring stations in the Chesapeake Bay Program (CBP) Nontidal Network (NTN). The original release of the results was in July 2022. During a process to implement a new software package for the next update of NTN data, the USGS discovered some questionable data values. Most of the questionable values were related to a coding...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center
USGS revises 2020 nontidal load and trend results

USGS revises 2020 nontidal load and trend results

Issue: The USGS has revised loads and trends through 2020 from monitoring stations in the Chesapeake Bay Program (CBP) Nontidal Network (NTN). The original release of the results was in July 2022. During a process to implement a new software package for the next update of NTN data, the USGS discovered some questionable data values. Most of the questionable values were related to a coding...
Learn More
Table of Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

USGS calculates loads and trends through 2021 for the nine major rivers entering Chesapeake Bay

Issue: The amount of nutrients and suspended sediment entering the Chesapeake Bay affect water-quality conditions in tidal waters. Excess nutrients contribute to algal blooms that lower the oxygen levels in tidal waters that are important for fish and shellfish. The algal blooms, along with suspended sediment, also decrease visibility in shallow waters for submerged aquatic grasses. The grasses...
By
Chesapeake Bay Activities, Maryland-Delaware-D.C. Water Science Center, Virginia and West Virginia Water Science Center
USGS calculates loads and trends through 2021 for the nine major rivers entering Chesapeake Bay

USGS calculates loads and trends through 2021 for the nine major rivers entering Chesapeake Bay

Issue: The amount of nutrients and suspended sediment entering the Chesapeake Bay affect water-quality conditions in tidal waters. Excess nutrients contribute to algal blooms that lower the oxygen levels in tidal waters that are important for fish and shellfish. The algal blooms, along with suspended sediment, also decrease visibility in shallow waters for submerged aquatic grasses. The grasses...
Learn More
White Heron in Marsh

Tracking Status and Trends in Seven Key Indicators of River and Stream Condition in the Chesapeake Bay Watershed

Identifying and tracking the status of, and trends in, stream health within the Chesapeake Bay watershed is essential to understanding the past, present, and future trajectory of the watershed’s resources and ecological condition. A team of USGS scientists is meeting this need with an initiative to track the status of, and trends in, key indicators of the health of non-tidal freshwater streams...
By
Chesapeake Bay Activities, Eastern Ecological Science Center, Maryland-Delaware-D.C. Water Science Center, Pennsylvania Water Science Center, South Atlantic Water Science Center (SAWSC), Virginia and West Virginia Water Science Center
Tracking Status and Trends in Seven Key Indicators of River and Stream Condition in the Chesapeake Bay Watershed

Tracking Status and Trends in Seven Key Indicators of River and Stream Condition in the Chesapeake Bay Watershed

Identifying and tracking the status of, and trends in, stream health within the Chesapeake Bay watershed is essential to understanding the past, present, and future trajectory of the watershed’s resources and ecological condition. A team of USGS scientists is meeting this need with an initiative to track the status of, and trends in, key indicators of the health of non-tidal freshwater streams...
Learn More
Photograph of Pequea Creek, Pennsylvania

Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay

Issue: The amount of nutrients and suspended sediment entering the Chesapeake Bay affect water-quality conditions in tidal waters. Excess nutrients contribute to algal blooms that lower the oxygen levels in tidal waters that are important for fish and shellfish. The algal blooms, along with suspended sediment, also decrease visibility in shallow waters for submerged aquatic grasses. The grasses...
By
Core Science Systems Mission Area, Chesapeake Bay Activities, Virginia and West Virginia Water Science Center
Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay

Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay

Issue: The amount of nutrients and suspended sediment entering the Chesapeake Bay affect water-quality conditions in tidal waters. Excess nutrients contribute to algal blooms that lower the oxygen levels in tidal waters that are important for fish and shellfish. The algal blooms, along with suspended sediment, also decrease visibility in shallow waters for submerged aquatic grasses. The grasses...
Learn More
A bluegill visits submerged aquatic vegetation

Chesapeake Bay Water-Quality Loads and Trends

Access the most recent data gathered from the Chesapeake Bay Nontidal Monitoring Network, learn about the techniques used to collect this data, and read about the history of the Chesapeake Bay Nontidal Monitoring Program. Nontidal Network (NTN) data refers to data from the 123 monitoring stations where nutrients and sediment are collected monthly and during storms. River Input Monitoring (RIM)...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center
Chesapeake Bay Water-Quality Loads and Trends

Chesapeake Bay Water-Quality Loads and Trends

Access the most recent data gathered from the Chesapeake Bay Nontidal Monitoring Network, learn about the techniques used to collect this data, and read about the history of the Chesapeake Bay Nontidal Monitoring Program. Nontidal Network (NTN) data refers to data from the 123 monitoring stations where nutrients and sediment are collected monthly and during storms. River Input Monitoring (RIM)...
Learn More
Filter Total Items: 14

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2024 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2024

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed were calculated using monitoring data from the Chesapeake Bay River Input Monitoring (RIM) Network stations for the period 1985 through 2024. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2023 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2023

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed were calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations for the period 1985 through 2023. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2023 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2023

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay River Input Monitoring (RIM) Network stations for the period 1985 through 2023. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Data used to prioritize the selection of river basins for intensive monitoring and assessment by the U.S. Geological Survey Data used to prioritize the selection of river basins for intensive monitoring and assessment by the U.S. Geological Survey

The U.S. Geological Survey (USGS) developed a systematic, quantitative approach to prioritize candidate basins that can support the assessment and forecasting objectives of the major USGS water science programs. Candidate basins were the level-4 hydrologic units (HUC4) with some of the smaller HUC4s being combined (hereafter referred to as modified HUC4 basins). Candidate basins for the...
By
Colorado Water Science Center

Selected inputs for examining the complex relations between climate and streamflow in the Mid-Atlantic region of the United States Selected inputs for examining the complex relations between climate and streamflow in the Mid-Atlantic region of the United States

Streams provide water for human activities and consumption in much of the world. Streamflow is largely controlled by climate forces, therefore it is likely sensitive to climate changes. We analyzed daily air temperature (AT), precipitation (P), and stream discharge (Q) metrics for 124 watersheds in Maryland, Virginia, and North Carolina, United States, from 1981 through 2020. Spatial...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2022 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2022

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay River Input Monitoring (RIM) Network stations for the period 1985 through 2022. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Selected Inputs of Siting Considerations for Satellite Observation of River Discharge Selected Inputs of Siting Considerations for Satellite Observation of River Discharge

Uncertainty of satellite discharge estimates is affected by choice of satellite sensor, hydraulic variable for observation, and discharge estimation algorithm, as well as the availability of ground-calibration data. Site selection is very important for reducing error and uncertainty in both conventional and satellite-based discharge measurements because geomorphic river characteristics...
By
Virginia and West Virginia Water Science Center

Environmental Sampling of Per- and Polyfluoroalkyl Substances in the Middle Chickahominy River Watershed, Virginia, 2021-2022 (ver. 2.0, September 2023) Environmental Sampling of Per- and Polyfluoroalkyl Substances in the Middle Chickahominy River Watershed, Virginia, 2021-2022 (ver. 2.0, September 2023)

These data were collected to understand the occurrence of Per- and Polyfluoroalkyl Substances (PFAS) in the middle Chickahominy River watershed. Specifically, this effort was initiated to: 1. Determine concentrations of PFAS in surface water at select locations in the middle Chickahominy River watershed; 2. Determine concentrations of PFAS in edible portions of fish at select locations...
By
Virginia and West Virginia Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2021 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2021

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay River Input Monitoring (RIM) Network stations for the period 1985 through 2021. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Computed Streamflow Using Satellite Data for Selected Rivers in Alaska Computed Streamflow Using Satellite Data for Selected Rivers in Alaska

This dataset provides computed remotely-sensed streamflows (RSQ) at river reaches of selected rivers in Alaska. We used the relation between water-surface elevation data derived from satellite altimetry and dynamic surface water extent data derived from LANDSAT and Sentinel imagery data with the Modified Optimized Manning Method Algorithm (MOMMA) to compute remotely sensed streamflows...
By
Alaska Science Center, New England Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2020 (ver. 2.0, January 2023) Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2020 (ver. 2.0, January 2023)

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations stations for the period 1985 through 2020. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Radar-based field measurements of surface velocity and discharge from 10 U.S. Geological Survey streamgages for various locations in the United States, 2002-19 Radar-based field measurements of surface velocity and discharge from 10 U.S. Geological Survey streamgages for various locations in the United States, 2002-19

Near-field remote sensing methods were used to collect Doppler velocity and pulsed stage radar data at 10 conventional U.S. Geological Survey streamgages in river reaches with varying hydrologic and hydraulic characteristics. Basin sizes ranged from 381 to 66,200 square kilometers and included agricultural, desert, forest, mixed, and high-gradient mountain environments. During the siting...
By
Colorado Water Science Center
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

An illustration of updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

By
Chesapeake Bay Activities
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

An illustration of updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

By
Chesapeake Bay Activities
Table of Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)
Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)
Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)
Table of Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Summary of long-term (1985-2021) and short-term (2012-2021) trends in nitrogen, phosphorus, and suspended-sediment loads for the River Input Monitoring stations. “Improving” or “Degrading” trends are classified as likelihood estimates greater than or equal to 67 percent, whereas “No trend” estimates are greater than 33 and less than 67 percent.

By
Chesapeake Bay Activities
Table of Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Summary of long-term (1985-2021) and short-term (2012-2021) trends in nitrogen, phosphorus, and suspended-sediment loads for the River Input Monitoring stations. “Improving” or “Degrading” trends are classified as likelihood estimates greater than or equal to 67 percent, whereas “No trend” estimates are greater than 33 and less than 67 percent.

By
Chesapeake Bay Activities

Geonarrative: Nontidal Network Mapper Geonarrative: Nontidal Network Mapper

The Nontidal Network Mapper is a data-driven, interactive narrative that shares the short-term nutrient and suspended-sediment load and trend results for the Chesapeake Bay Program’s non-tidal network (NTN) and provides interactive tools to further examine results.
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Science and Products

Potomac Tributary Summary: A summary of trends in tidal water quality and associated factors, 1985 - 2022 Potomac Tributary Summary: A summary of trends in tidal water quality and associated factors, 1985 - 2022

The Potomac Tributary Summary outlines change over time for a suite of monitored tidal water quality parameters and associated potential drivers of those trends for the period of 1985 to 2022, and provides a brief description of the current state of knowledge explaining these observed changes. Water quality parameters described include surface (above pycnocline) total nitrogen (TN)...
Authors
Breck Sullivan, Kaylyn Gootman, Alex Gunnerson, Sarah Betts, Gabriel Duran, Cindy Johnson, Christopher Mason, Elgin Perry, Gopal Bhatt, Jennifer Keisman, James Webber, Jon Harcum, Michael Lane, Olivia Devereux, Qian Zhang, Rebecca Murphy, Renee Karrh, Thomas Butler, Zhaoying Wei
By
Chesapeake Bay Activities, Maryland-Delaware-D.C. Water Science Center, Virginia and West Virginia Water Science Center

Tracking status and trends in seven key indicators of river and stream condition in the Chesapeake Bay watershed Tracking status and trends in seven key indicators of river and stream condition in the Chesapeake Bay watershed

Freshwater streams and rivers are recognized as vital habitats within the Chesapeake Bay watershed, which has been undergoing extensive restoration efforts for more than 30 years. Resource managers need to understand stream and river condition and how these conditions are changing over time to determine whether regional long-term restoration and conservation goals are being met. The...
Authors
Lindsey Boyle, Samuel Austin, Matthew Cashman, Zachary Clifton, John Clune, James Colgin, Kaitlyn Elliott, Rosemary Fanelli, Ellie Foss, Nathaniel Hitt, Elizabeth Hittle, Coral Howe, Emily Majcher, Kelly Maloney, Christopher Mason, Marina Metes, Douglas Moyer, Trevor Needham, Karli Rogers, Joshua Thompson, Guoxiang Yang, Tammy Zimmerman
By
Chesapeake Bay Activities, Pennsylvania Water Science Center, Virginia and West Virginia Water Science Center

Rappahannock tributary summary: A summary of trends in tidal water quality and associated factors, 1985-2022 Rappahannock tributary summary: A summary of trends in tidal water quality and associated factors, 1985-2022

The Rappahannock Tributary Summary outlines change over time for a suite of monitored tidal water quality parameters and associated potential drivers of those trends for the period of 1985 to 2022, and provides a brief description of the current state of knowledge explaining these observed changes. Water quality parameters described include surface (above pycnocline) total nitrogen (TN)...
Authors
Breck Sullivan, Kaylyn Gootman, Alex Gunnerson, Sarah Betts, Cindy Johnson, Christopher Mason, Elgin Perry, Gopal Bhatt, Jennifer Keisman, James Webber, Jon Harcum, Michael Lane, Olivia Devereux, Qian Zhang, Rebecca Murphy, Renee Karrh, Thomas Butler, Vanessa Van Note, Angie Wei
By
Maryland-Delaware-D.C. Water Science Center

Siting considerations for satellite observation of river discharge Siting considerations for satellite observation of river discharge

With growing global capability for satellite measurement of river discharge (flow) comes a need to understand and reduce error in satellite-based discharge measurements. Satellite-based discharge estimates are based on measurements of water surface width, elevation, slope, and potentially velocity. Site selection is important for reducing error and uncertainty in both conventional and...
Authors
Jack R. Eggleston, Christopher Mason, David Bjerklie, Michael Durand, Robert W. Dudley, Merritt Harlan
By
Water Resources Mission Area, New England Water Science Center

Examining the complex relations between climate and streamflow in the mid-atlantic region of the United States Examining the complex relations between climate and streamflow in the mid-atlantic region of the United States

We explored the complex relations between climate and streamflow in the Mid-Atlantic region of the United States. In 124 watersheds across this region, we quantified spatial and temporal variation in air temperature (AT), precipitation (P), and streamflow (Q) from 1981 through 2020. Upward directional trends in monthly values of AT, P, and Q indicated an increase of 0.27–1.9 degrees...
Authors
Karen Rice, Christopher Mason, Aaron L. Mills
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

James Tributary summary: A summary of trends in tidal water quality and associated factors, 1985-2021 James Tributary summary: A summary of trends in tidal water quality and associated factors, 1985-2021

The James Tributary Summary outlines change over time for a suite of monitored tidal water quality parameters and associated potential drivers of those trends for the period 1985 – 2021 and provides a brief description of the current state of knowledge explaining these observed changes. Water quality parameters described include surface (above pycnocline) total nitrogen (TN), surface...
Authors
Breck Sullivan, Kaylyn Gootman, Alex Gunnerson, Cindy Johnson, Christopher Mason, Elgin Perry, Gopal Bhatt, Jennifer Keisman, James Webber, Jon Harcum, Mike Lane, Olivia Devereux, Qian Zhang, Rebecca Murphy, Renee Karrh, Tom Butler, Vanessa Van Note, Zhaoying Wei
By
Maryland-Delaware-D.C. Water Science Center, Virginia and West Virginia Water Science Center

Tracking status and trends in seven key indicators of stream health in the Chesapeake Bay watershed Tracking status and trends in seven key indicators of stream health in the Chesapeake Bay watershed

“The Bay Connects us, the Bay reflects us” writes Tom Horton in the book “Turning the Tide—Saving the Chesapeake Bay”. The Chesapeake Bay watershed contains the largest estuary in the United States. The watershed stretches north to Cooperstown, New York, south to Lynchburg and Virginia Beach, Virginia, west to Pendleton County, West Virginia, and east to Seaford, Delaware, and Scranton...
Authors
Samuel Austin, Matthew Cashman, John W. Clune, James Colgin, Rosemary M. Fanelli, Kevin Krause, Emily Majcher, Kelly Maloney, Christopher Mason, Douglas Moyer, Tammy M. Zimmerman
By
Ecosystems Mission Area, Water Resources Mission Area, Environmental Health Program, Chesapeake Bay Activities, Eastern Ecological Science Center, Maryland-Delaware-D.C. Water Science Center, Pennsylvania Water Science Center, South Atlantic Water Science Center (SAWSC), Virginia and West Virginia Water Science Center

Prioritizing river basins for intensive monitoring and assessment by the US Geological Survey Prioritizing river basins for intensive monitoring and assessment by the US Geological Survey

The US Geological Survey (USGS) is currently (2020) integrating its water science programs to better address the nation’s greatest water resource challenges now and into the future. This integration will rely, in part, on data from 10 or more intensively monitored river basins from across the USA. A team of USGS scientists was convened to develop a systematic, quantitative approach to...
Authors
Peter Van Metre, Sharon Qi, Jeffrey Deacon, Cheryl A. Dieter, Jessica Driscoll, Michael Fienen, Terry Kenney, Patrick Lambert, David Lesmes, Christopher Allen Mason, Anke Mueller-Solger, MaryLynn Musgrove, Jaime Painter, Donald Rosenberry, Lori Sprague, Anthony Tesoriero, Lisamarie Windham-Myers, David Wolock
By
Water Resources Mission Area, Integrated Water Availability Assessments, Wildland Fire Science

Near-field remote sensing of surface velocity and river discharge using radars and the probability concept at 10 USGS streamgages Near-field remote sensing of surface velocity and river discharge using radars and the probability concept at 10 USGS streamgages

Near-field remote sensing of surface velocity and river discharge (discharge) were measured using coherent, continuous wave Doppler and pulsed radars. Traditional streamgaging requires sensors be deployed in the water column; however, near-field remote sensing has the potential to transform streamgaging operations through non-contact methods in the U.S. Geological Survey (USGS) and other...
Authors
John Fulton, Christopher Mason, Jack R. Eggleston, Matthew Nicotra, C.-L. Chiu, Mark Henneberg, Heather Best, Jay Cederberg, Stephen Holnbeck, R. Lotspeich, Christopher Laveau, Tommaso Moramarco, Mark Jones, Jonathan Gourley, Danny Wasielewski
By
Water Resources Mission Area, Colorado Water Science Center, National Innovation Center, Pennsylvania Water Science Center

Non-USGS Publications**

McGarvey, D.J. and Mason, C.A. 2015. Re-Envisioning the Communication of our Science. Limnology and Oceanography Bulletin, 24: 1-4. https://doi.org/10.1002/lob.10007.

**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.

Hydrologic technician Fisseha Mengistu reels in a sampling bottle.

Informing Chesapeake Bay Watershed Management by Monitoring Trends in River Nutrient and Sediment Loads

The USGS has computed nutrient and suspended-sediment loads and trends through water year 2023 in Chesapeake Bay rivers. These monitoring-based estimates help federal, state, and local managers evaluate and plan water-quality restoration strategies.
By
Chesapeake Bay Activities, Maryland-Delaware-D.C. Water Science Center, Pennsylvania Water Science Center, Virginia and West Virginia Water Science Center
Informing Chesapeake Bay Watershed Management by Monitoring Trends in River Nutrient and Sediment Loads

Informing Chesapeake Bay Watershed Management by Monitoring Trends in River Nutrient and Sediment Loads

The USGS has computed nutrient and suspended-sediment loads and trends through water year 2023 in Chesapeake Bay rivers. These monitoring-based estimates help federal, state, and local managers evaluate and plan water-quality restoration strategies.
Learn More
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

USGS revises 2020 nontidal load and trend results

Issue: The USGS has revised loads and trends through 2020 from monitoring stations in the Chesapeake Bay Program (CBP) Nontidal Network (NTN). The original release of the results was in July 2022. During a process to implement a new software package for the next update of NTN data, the USGS discovered some questionable data values. Most of the questionable values were related to a coding...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center
USGS revises 2020 nontidal load and trend results

USGS revises 2020 nontidal load and trend results

Issue: The USGS has revised loads and trends through 2020 from monitoring stations in the Chesapeake Bay Program (CBP) Nontidal Network (NTN). The original release of the results was in July 2022. During a process to implement a new software package for the next update of NTN data, the USGS discovered some questionable data values. Most of the questionable values were related to a coding...
Learn More
Table of Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

USGS calculates loads and trends through 2021 for the nine major rivers entering Chesapeake Bay

Issue: The amount of nutrients and suspended sediment entering the Chesapeake Bay affect water-quality conditions in tidal waters. Excess nutrients contribute to algal blooms that lower the oxygen levels in tidal waters that are important for fish and shellfish. The algal blooms, along with suspended sediment, also decrease visibility in shallow waters for submerged aquatic grasses. The grasses...
By
Chesapeake Bay Activities, Maryland-Delaware-D.C. Water Science Center, Virginia and West Virginia Water Science Center
USGS calculates loads and trends through 2021 for the nine major rivers entering Chesapeake Bay

USGS calculates loads and trends through 2021 for the nine major rivers entering Chesapeake Bay

Issue: The amount of nutrients and suspended sediment entering the Chesapeake Bay affect water-quality conditions in tidal waters. Excess nutrients contribute to algal blooms that lower the oxygen levels in tidal waters that are important for fish and shellfish. The algal blooms, along with suspended sediment, also decrease visibility in shallow waters for submerged aquatic grasses. The grasses...
Learn More
White Heron in Marsh

Tracking Status and Trends in Seven Key Indicators of River and Stream Condition in the Chesapeake Bay Watershed

Identifying and tracking the status of, and trends in, stream health within the Chesapeake Bay watershed is essential to understanding the past, present, and future trajectory of the watershed’s resources and ecological condition. A team of USGS scientists is meeting this need with an initiative to track the status of, and trends in, key indicators of the health of non-tidal freshwater streams...
By
Chesapeake Bay Activities, Eastern Ecological Science Center, Maryland-Delaware-D.C. Water Science Center, Pennsylvania Water Science Center, South Atlantic Water Science Center (SAWSC), Virginia and West Virginia Water Science Center
Tracking Status and Trends in Seven Key Indicators of River and Stream Condition in the Chesapeake Bay Watershed

Tracking Status and Trends in Seven Key Indicators of River and Stream Condition in the Chesapeake Bay Watershed

Identifying and tracking the status of, and trends in, stream health within the Chesapeake Bay watershed is essential to understanding the past, present, and future trajectory of the watershed’s resources and ecological condition. A team of USGS scientists is meeting this need with an initiative to track the status of, and trends in, key indicators of the health of non-tidal freshwater streams...
Learn More
Photograph of Pequea Creek, Pennsylvania

Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay

Issue: The amount of nutrients and suspended sediment entering the Chesapeake Bay affect water-quality conditions in tidal waters. Excess nutrients contribute to algal blooms that lower the oxygen levels in tidal waters that are important for fish and shellfish. The algal blooms, along with suspended sediment, also decrease visibility in shallow waters for submerged aquatic grasses. The grasses...
By
Core Science Systems Mission Area, Chesapeake Bay Activities, Virginia and West Virginia Water Science Center
Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay

Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay

Issue: The amount of nutrients and suspended sediment entering the Chesapeake Bay affect water-quality conditions in tidal waters. Excess nutrients contribute to algal blooms that lower the oxygen levels in tidal waters that are important for fish and shellfish. The algal blooms, along with suspended sediment, also decrease visibility in shallow waters for submerged aquatic grasses. The grasses...
Learn More
A bluegill visits submerged aquatic vegetation

Chesapeake Bay Water-Quality Loads and Trends

Access the most recent data gathered from the Chesapeake Bay Nontidal Monitoring Network, learn about the techniques used to collect this data, and read about the history of the Chesapeake Bay Nontidal Monitoring Program. Nontidal Network (NTN) data refers to data from the 123 monitoring stations where nutrients and sediment are collected monthly and during storms. River Input Monitoring (RIM)...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center
Chesapeake Bay Water-Quality Loads and Trends

Chesapeake Bay Water-Quality Loads and Trends

Access the most recent data gathered from the Chesapeake Bay Nontidal Monitoring Network, learn about the techniques used to collect this data, and read about the history of the Chesapeake Bay Nontidal Monitoring Program. Nontidal Network (NTN) data refers to data from the 123 monitoring stations where nutrients and sediment are collected monthly and during storms. River Input Monitoring (RIM)...
Learn More
Filter Total Items: 14

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2024 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2024

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed were calculated using monitoring data from the Chesapeake Bay River Input Monitoring (RIM) Network stations for the period 1985 through 2024. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2023 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2023

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed were calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations for the period 1985 through 2023. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2023 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2023

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay River Input Monitoring (RIM) Network stations for the period 1985 through 2023. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Data used to prioritize the selection of river basins for intensive monitoring and assessment by the U.S. Geological Survey Data used to prioritize the selection of river basins for intensive monitoring and assessment by the U.S. Geological Survey

The U.S. Geological Survey (USGS) developed a systematic, quantitative approach to prioritize candidate basins that can support the assessment and forecasting objectives of the major USGS water science programs. Candidate basins were the level-4 hydrologic units (HUC4) with some of the smaller HUC4s being combined (hereafter referred to as modified HUC4 basins). Candidate basins for the...
By
Colorado Water Science Center

Selected inputs for examining the complex relations between climate and streamflow in the Mid-Atlantic region of the United States Selected inputs for examining the complex relations between climate and streamflow in the Mid-Atlantic region of the United States

Streams provide water for human activities and consumption in much of the world. Streamflow is largely controlled by climate forces, therefore it is likely sensitive to climate changes. We analyzed daily air temperature (AT), precipitation (P), and stream discharge (Q) metrics for 124 watersheds in Maryland, Virginia, and North Carolina, United States, from 1981 through 2020. Spatial...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2022 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2022

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay River Input Monitoring (RIM) Network stations for the period 1985 through 2022. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Selected Inputs of Siting Considerations for Satellite Observation of River Discharge Selected Inputs of Siting Considerations for Satellite Observation of River Discharge

Uncertainty of satellite discharge estimates is affected by choice of satellite sensor, hydraulic variable for observation, and discharge estimation algorithm, as well as the availability of ground-calibration data. Site selection is very important for reducing error and uncertainty in both conventional and satellite-based discharge measurements because geomorphic river characteristics...
By
Virginia and West Virginia Water Science Center

Environmental Sampling of Per- and Polyfluoroalkyl Substances in the Middle Chickahominy River Watershed, Virginia, 2021-2022 (ver. 2.0, September 2023) Environmental Sampling of Per- and Polyfluoroalkyl Substances in the Middle Chickahominy River Watershed, Virginia, 2021-2022 (ver. 2.0, September 2023)

These data were collected to understand the occurrence of Per- and Polyfluoroalkyl Substances (PFAS) in the middle Chickahominy River watershed. Specifically, this effort was initiated to: 1. Determine concentrations of PFAS in surface water at select locations in the middle Chickahominy River watershed; 2. Determine concentrations of PFAS in edible portions of fish at select locations...
By
Virginia and West Virginia Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2021 Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2021

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay River Input Monitoring (RIM) Network stations for the period 1985 through 2021. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Computed Streamflow Using Satellite Data for Selected Rivers in Alaska Computed Streamflow Using Satellite Data for Selected Rivers in Alaska

This dataset provides computed remotely-sensed streamflows (RSQ) at river reaches of selected rivers in Alaska. We used the relation between water-surface elevation data derived from satellite altimetry and dynamic surface water extent data derived from LANDSAT and Sentinel imagery data with the Modified Optimized Manning Method Algorithm (MOMMA) to compute remotely sensed streamflows...
By
Alaska Science Center, New England Water Science Center

Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2020 (ver. 2.0, January 2023) Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2020 (ver. 2.0, January 2023)

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations stations for the period 1985 through 2020. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach...
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center

Radar-based field measurements of surface velocity and discharge from 10 U.S. Geological Survey streamgages for various locations in the United States, 2002-19 Radar-based field measurements of surface velocity and discharge from 10 U.S. Geological Survey streamgages for various locations in the United States, 2002-19

Near-field remote sensing methods were used to collect Doppler velocity and pulsed stage radar data at 10 conventional U.S. Geological Survey streamgages in river reaches with varying hydrologic and hydraulic characteristics. Basin sizes ranged from 381 to 66,200 square kilometers and included agricultural, desert, forest, mixed, and high-gradient mountain environments. During the siting...
By
Colorado Water Science Center
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

An illustration of updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

By
Chesapeake Bay Activities
Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

Updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

An illustration of updated short-term nitrogen and phosphorous trends in the Chesapeake Bay

By
Chesapeake Bay Activities
Table of Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)
Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)
Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)
Table of Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Summary of long-term (1985-2021) and short-term (2012-2021) trends in nitrogen, phosphorus, and suspended-sediment loads for the River Input Monitoring stations. “Improving” or “Degrading” trends are classified as likelihood estimates greater than or equal to 67 percent, whereas “No trend” estimates are greater than 33 and less than 67 percent.

By
Chesapeake Bay Activities
Table of Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Trends in nitrogen, phosphorus, and suspended-sediment loads for RIM (2021)

Summary of long-term (1985-2021) and short-term (2012-2021) trends in nitrogen, phosphorus, and suspended-sediment loads for the River Input Monitoring stations. “Improving” or “Degrading” trends are classified as likelihood estimates greater than or equal to 67 percent, whereas “No trend” estimates are greater than 33 and less than 67 percent.

By
Chesapeake Bay Activities

Geonarrative: Nontidal Network Mapper Geonarrative: Nontidal Network Mapper

The Nontidal Network Mapper is a data-driven, interactive narrative that shares the short-term nutrient and suspended-sediment load and trend results for the Chesapeake Bay Program’s non-tidal network (NTN) and provides interactive tools to further examine results.
By
Chesapeake Bay Activities, Virginia and West Virginia Water Science Center
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