Pennsylvania and the Chesapeake Bay Watershed
USGS Releases new fact sheet on conservation practices
Your land, your water—Using research to guide conservation practices on local farms in the Chesapeake Bay watershed
USGS Evaluates Effects of Agricultural Conservation Practices
A new study on best management practices and nitrogen in streams of the Chesapeake Bay Watershed
Groundwater is a major source of nitrate to Chesapeake Bay
Land use, organic carbon in soils, and geology can explain where groundwater contributions are the most important
Removal of Legacy Sediments Effects Nutrient Loads in Streamflow
Effects of Legacy Sediment Removal on Nutrients and Sediment in Big Spring Run, Lancaster County, Pennsylvania, 2009–15
USGS provides monitoring, analysis, modeling and research on streams and water quality to better understand the fate and transport of nutrients and sediment to the Susquehanna and other rivers, and their tributaries, and eventually to the Chesapeake Bay. Additional research focuses on emerging contaminants and other stressors that effect human and aquatic life in the watershed and estuary.
The Susquehanna River drains the largest watershed (48 percent) and supplies 55 percent of the freshwater flowing into the Chesapeake Bay. In 2010, the largest and most complex total maximum daily load (TMDL) in the Nation was initiated in the Chesapeake Bay for nitrogen, phosphorus, and sediment. These pollution allocations were further divided by major river basins and states. Pennsylvania contributes approximately 44 percent of the nitrogen load and 24 percent of the phosphorus load to the Bay (Chesapeake Bay TMDL Document).
Also see regional science at Chesapeake Bay Activities
Summarizing Scientific Findings for Common Stakeholder Questions to Inform Nutrient and Sediment Management Activities in the Chesapeake Bay Watershed
Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay
Data-sharing agreement renewed to evaluate conservations practices and water quality in the Chesapeake Watershed
USGS develops tool to further examine nutrient and sediment trends in the Chesapeake Bay Watershed
New Synthesis Describes Current Understanding of Factors Driving Nutrient Trends in Streams of the Chesapeake Bay Watershed
Flux of Nitrogen, Phosphorous, and Suspended Sediment from the Susquehanna River Basin to the Chesapeake Bay During Tropical Storm Lee, September 2011, as in Indicator of the Effects of Reservoir Sedimentation on Water Quality
Nitrogen in the Chesapeake Bay Watershed: A Century of Change
Narrated presentation that provides a unique, long-term perspective (1950-2050) of the major drivers of nitrogen change up to the present, and forecasts how they may affect nitrogen into the future for the Chesapeake Bay watershed. Information is based off of U.S. Geological Survey Circular 1486.
Nitrogen in the Chesapeake Bay watershed—A century of change, 1950–2050
Targeted and non-targeted analysis of young-of-year smallmouth bass using comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry
Perfluoroalkyl substances in plasma of smallmouth bass from the Chesapeake Bay Watershed
Environmental and anthropogenic drivers of contaminants in agricultural watersheds with implications for land management
Modeling estrogenic activity in streams throughout the Potomac and Chesapeake Bay watersheds
Nutrient trends and drivers in the Chesapeake Bay Watershed
Factors affecting nitrate concentrations in stream base flow
Spatiotemporal variation in occurrence and co-occurrence of pesticides, hormones, and other organic contaminants in rivers in the Chesapeake Bay Watershed, United States
Estimating streamflow and base flow within the nontidal Chesapeake Bay riverine system
Aquatic invasive species in the Chesapeake Bay drainage—Research-based needs and priorities of U.S. Geological Survey partners and collaborators
Sediment dynamics and implications for management: State of the science from long‐term research in the Chesapeake Bay watershed, USA
Effects of legacy sediment removal and effects on nutrients and sediment in Big Spring Run, Lancaster County, Pennsylvania, 2009–15
USGS provides monitoring, analysis, modeling and research on streams and water quality to better understand the fate and transport of nutrients and sediment to the Susquehanna and other rivers, and their tributaries, and eventually to the Chesapeake Bay. Additional research focuses on emerging contaminants and other stressors that effect human and aquatic life in the watershed and estuary.
The Susquehanna River drains the largest watershed (48 percent) and supplies 55 percent of the freshwater flowing into the Chesapeake Bay. In 2010, the largest and most complex total maximum daily load (TMDL) in the Nation was initiated in the Chesapeake Bay for nitrogen, phosphorus, and sediment. These pollution allocations were further divided by major river basins and states. Pennsylvania contributes approximately 44 percent of the nitrogen load and 24 percent of the phosphorus load to the Bay (Chesapeake Bay TMDL Document).
Also see regional science at Chesapeake Bay Activities
Summarizing Scientific Findings for Common Stakeholder Questions to Inform Nutrient and Sediment Management Activities in the Chesapeake Bay Watershed
Updated 2020 Nutrient and Suspended-Sediment Trends for the Nine Major Rivers Entering the Chesapeake Bay
Data-sharing agreement renewed to evaluate conservations practices and water quality in the Chesapeake Watershed
USGS develops tool to further examine nutrient and sediment trends in the Chesapeake Bay Watershed
New Synthesis Describes Current Understanding of Factors Driving Nutrient Trends in Streams of the Chesapeake Bay Watershed
Flux of Nitrogen, Phosphorous, and Suspended Sediment from the Susquehanna River Basin to the Chesapeake Bay During Tropical Storm Lee, September 2011, as in Indicator of the Effects of Reservoir Sedimentation on Water Quality
Nitrogen in the Chesapeake Bay Watershed: A Century of Change
Narrated presentation that provides a unique, long-term perspective (1950-2050) of the major drivers of nitrogen change up to the present, and forecasts how they may affect nitrogen into the future for the Chesapeake Bay watershed. Information is based off of U.S. Geological Survey Circular 1486.