Geonarrative: Nontidal Network Mapper
Nontidal Network Mapper
The Nontidal Network Mapper shares the short-term water-year nutrient and suspended-sediment load and trend results for the Chesapeake Bay Program’s nontidal network.
Release notes
Updates to this application are expected every two years to coincide with the release of the latest short-term nontidal network data. Visit the Chesapeake Bay Water-Quality Loads and Trends web page for additional information or to access the data used in the application.
-
August 2022 - updated to share 2011-2020 water year results
-
July 2020 - initial release, 2009-2018 water year results
About this tool
The Nontidal Network Mapper geonarrative shares the short-term nutrient and suspended-sediment load and trend results for the Chesapeake Bay Program’s nontidal network (Figure 1).
Data collected from the 123 nontidal network stations are analyzed by the U.S. Geological Survey every two years and are used to quantify the changes in nutrient (primarily nitrogen and phosphorus) and suspended-sediment loads. The results are used by the Chesapeake Bay Program partnership to help assess response in nontidal rivers and streams to nutrient and sediment reduction efforts.
The mapper provides the primary findings for nitrogen, phosphorus, and sediment trends and gives the user tools to further examine the results for river basins and individual sites.
Tool features
For each constituent (total nitrogen, total phosphorus, and suspended sediment), interactive maps, graphs, and query tools allow users to view both site-specific load, trend, and yield information as well as patterns across the Chesapeake Bay and its seven major watersheds.
For more information:
For more information on the nontidal network: Chesapeake Bay Water-Quality Loads and Trends
Related Content
Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay
USGS develops tool to further examine nutrient and sediment trends in the Chesapeake Bay Watershed
Chesapeake Bay Water-Quality Loads and Trends
River Input Monitoring
Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2020
Application of a Weighted Regression Model for Reporting Nutrient and Sediment Concentrations, Fluxes, and Trends in Concentration and Flux for the Chesapeake Bay Nontidal Water-Quality Monitoring Network, Results Through Water Year 2012
A bootstrap method for estimating uncertainty of water quality trends
User guide to Exploration and Graphics for RivEr Trends (EGRET) and dataRetrieval: R packages for hydrologic data
Evaluating long-term changes in river conditions (water quality and discharge) is an important use of hydrologic data. To carry out such evaluations, the hydrologist needs tools to facilitate several key steps in the process: acquiring the data records from a variety of sources, structuring it in ways that facilitate the analysis, processing the data with routines that extract information about ch
Comparison of two regression-based approaches for determining nutrient and sediment fluxes and trends in the Chesapeake Bay watershed
Weighted regressions on time, discharge, and season (WRTDS), with an application to Chesapeake Bay River inputs
Load and trend results would not be possible without the ongoing monitoring and program support of our partners.
Related Content
Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay
USGS develops tool to further examine nutrient and sediment trends in the Chesapeake Bay Watershed
Chesapeake Bay Water-Quality Loads and Trends
River Input Monitoring
Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2020
Application of a Weighted Regression Model for Reporting Nutrient and Sediment Concentrations, Fluxes, and Trends in Concentration and Flux for the Chesapeake Bay Nontidal Water-Quality Monitoring Network, Results Through Water Year 2012
A bootstrap method for estimating uncertainty of water quality trends
User guide to Exploration and Graphics for RivEr Trends (EGRET) and dataRetrieval: R packages for hydrologic data
Evaluating long-term changes in river conditions (water quality and discharge) is an important use of hydrologic data. To carry out such evaluations, the hydrologist needs tools to facilitate several key steps in the process: acquiring the data records from a variety of sources, structuring it in ways that facilitate the analysis, processing the data with routines that extract information about ch
Comparison of two regression-based approaches for determining nutrient and sediment fluxes and trends in the Chesapeake Bay watershed
Weighted regressions on time, discharge, and season (WRTDS), with an application to Chesapeake Bay River inputs
Load and trend results would not be possible without the ongoing monitoring and program support of our partners.