water quality in the anacostia river
Download
Skip this Video
Download Presentation
Water Quality in the Anacostia River

Loading in 2 Seconds...

play fullscreen
1 / 15

Water Quality in the Anacostia River - PowerPoint PPT Presentation


  • 118 Views
  • Uploaded on

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

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Water Quality in the Anacostia River' - allyson


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
slide3
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”
predictions based on land cover
Predictions based on land cover
  • High concentrations in tidal drainage streams
  • Little contaminant contribution from NW and NE branches
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
additional factors
Additional Factors
  • Sediment
    • Stream gage
    • Suspended sediment
    • Precipitation
  • Frequency of water quality monitoring
  • Scope of land cover classification
  • EPA Priority Sites
ad