Pennsylvania and the Chesapeake Bay Watershed

Sediment Response of Stream Restoration Practices

Sediment Response of Stream  Restoration Practices

Assessing stream restoration effectiveness by quantifying sediment erosion and deposition along restored and eroded agricultural stream reaches

Turtle Creek Study

Non-Tidal Monitoring and Analysis

Non-Tidal Monitoring and Analysis

The Chesapeake Bay Nontidal monitoring network (NTN) provides water quality loads and trends for the Chesapeake Bay watershed.

NTN Geonarrative

Water Quality to Inform Conservation Management

Water Quality to Inform Conservation Management

The occurrence and distribution of nutrients, and an understanding of biogeochemical processes aims to help aid conservation efforts.

Fishing Creek Study

Science Center Objects

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 River and its tributaries and eventually to the Chesapeake Bay. Additional research efforts in the Susquehanna River basin focus on emerging contaminants and other stressors that effect human and aquatic life in the watershed and estuary.


Satellite image of Chesapeake Bay area showing sediment plume

MODIS image of Chesapeake Bay area after Tropical Storm Lee, September 2011. (Public domain.)

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 phosphorus load to the Bay (Chesapeake Bay TMDL Document).