Water quality in the anacostia river
This presentation is the property of its rightful owner.
Sponsored Links
1 / 15

Water Quality in the Anacostia River PowerPoint PPT Presentation


  • 67 Views
  • Uploaded on
  • Presentation posted in: General

Water Quality in the Anacostia River. Tony Smith December 1, 2005. Introduction. Purpose: identify sources of contaminant Data NHD (USGS) NED (USGS) Land cover (USGS) USGS bioavailability studies (Phelps 2002, 2003, 2004) Conclusion. PAHs. Polycyclic aromatic hydrocarbons

Download Presentation

Water Quality in the Anacostia River

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Water quality in the anacostia river

Water Quality in the Anacostia River

Tony Smith

December 1, 2005


Introduction

Introduction

  • Purpose: identify sources of contaminant

  • Data

    • NHD (USGS)

    • NED (USGS)

    • Land cover (USGS)

    • USGS bioavailability studies (Phelps 2002, 2003, 2004)

  • Conclusion


Water quality in the anacostia river

PAHs

  • Polycyclic aromatic hydrocarbons

    • occur naturally

    • produced in combustion reactions

  • Known or suspected carcinogens and mutagens

  • Integrated Risk Information System

    • RfD (naphthalene): 20 μg / kg day (estimate of daily exposure to population without appreciable deleterious effect)


The anacostia river

The Anacostia River

  • Watershed

    • covers 176 square miles

    • home to 800,000

  • Three main drainage areas

    • northwest (32%)

    • northeast (45%)

    • Tidal (23%)

  • 1988 - 1995: spills totaling 60,000 gallons

  • “One of America’s 10 worst rivers”


Huc 02070010 middle potomac anacostia occoquan

HUC 02070010Middle Potomac-Anacostia-Occoquan


Land cover

Land Cover


Catchments and industry

Catchments and Industry


Predictions based on land cover

Predictions based on land cover

  • High concentrations in tidal drainage streams

  • Little contaminant contribution from NW and NE branches


Pah concentrations 2001

PAH concentrations, 2001


Pah concentrations 2002

PAH Concentrations, 2002


Pah concentrations 2003

PAH Concentrations, 2003


Summary of data and conclusion

Summary of Data and Conclusion

  • 20 of 23 higher than reference (p<0.05)

  • Clam survival 6 – 98%

  • NE and Tidal Branches are primary contributors

    • Beltsville Agricultural Research Center is US EPA National Priority Site

    • US Navy Yard, Washington Gas Light Facility


Pah concentrations 20021

PAH Concentrations, 2002


Additional factors

Additional Factors

  • Sediment

    • Stream gage

    • Suspended sediment

    • Precipitation

  • Frequency of water quality monitoring

  • Scope of land cover classification

  • EPA Priority Sites


Thanks

Thanks


  • Login