Chesapeake Bay Benthic Monitoring Program

 Home   Up   Upper Bay   Western Tributaries   Eastern Tributaries   Maryland Mainstem   Patuxent River   Potomac River 
_____________________/\__________________________________________________________________________________________________


Potomac River

Stratum Summary

The Potomac River has one of the highest areas with degraded benthic community condition in the Chesapeake Bay. Much of the problem in the Potomac River is severe oxygen depletion in the lower deep mainstem. In 2003, the Potomac River had the highest percentage of sites among strata failing the Restoration Goals because of insufficient abundance or biomass. Fifty-nine percent of the bottom dissolved oxygen readings at Water Quality Monitoring Program stations in the lower Potomac were below 1 mg/L in 2003. Note the increased estimate of severely degraded condition in 1996 and 2003, the two years with the highest precipitation and most severe hypoxia (chart below).

The Potomac River sampling stratum coincides with the Potomac River Basin. There are further details at the basin level which the Benthic Program provides to summarize benthic community condition for the basin Tributary Teams. Tributary Teams consider basin summaries that synthesize monitoring information from several sources, including watershed, ambient water quality, habitat, and living resources components. This information is linked to nutrient and sediment pollution sources and is intended to provide the Tributary Teams with resources to consult in setting Tributary Strategy Goals.



 

CIMS
Home
What are
Benthos?
Design and
Methods
Results Reports and
Other Documents
Data
Sets
Related
Information
LTB
Home
Credits

URL http://esm.versar.com/vcb/benthos/strata/upperbay.htm

Revised: Sept 10, 2013