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Browse History: Elizabeth River (2010)

Chesapeake Bay - Reporting Region Summary:



  Estuary Selection Map

Scores & Conceptual Diagram


Bay Health Index
Benthic Index of Biotic Integrity Icon
19%*
Elizabeth River: 2010

Incomplete assessment. Phytoplankton community condition continues to be very poor with a 0% for the fourth year in a row. Water quality indicators remained steady from last year.

*Based on the average of four indicators, grade not provided.
  • Water quality: Water clarity was very poor, scoring a 0% in 2010, which is consistent with the majority of water clarity scores over the last 20+ years. Chlorophyll a (27%) and dissolved oxygen (50%) both increased slightly compared to their respective scores from 2009 (24% and 49%).
  • Biotic indicators: Two of the three biotic indicators (benthic community and aquatic grasses) do not have data at this time, leading to an incomplete assessment. Aquatic grasses are not measured in the Elizabeth River because they do not naturally occur in this region. The phytoplankton community condition score in 2010 was 0% for the fourth year in a row, meaning none of the samples collected passed the threshold level.

Score Legend
Locator Map
  Index/Indicator Score     Index/Indicator Score
Benthic Index of Biotic Integrity Icon Chlorophyll a
27%
  Benthic Index of Biotic Integrity Icon Aquatic grasses
No Growth Zone
Benthic Index of Biotic Integrity Icon Dissolved oxygen
50%
  Benthic Index of Biotic Integrity Icon Benthic Index of Biotic Integrity
Insuff. Data
Benthic Index of Biotic Integrity Icon Water clarity
0%
  Benthic Index of Biotic Integrity Icon Phytoplankton Index of Biotic Integrity
0%
 
Benthic Index of Biotic Integrity Icon Water Quality Index
26%
  Biotic Index Icon Biotic Index
Insuff. Data
 

Excel Spreadsheet

Dynamic Conceptual Diagram

Editable Vector Diagram (SVG)

Maps

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Region Info

The Elizabeth River watershed drains approximately 200 square miles of land and flows into the mouth of the James River. The main branch of the estuary is approximately 5 mi long and 2 mi wide at its mouth. Land use on the watershed is predominantly urban with the Cities of Norfolk and Portsmouth flanking the main tributaries.

elizabeth_riverconceptual diagram.png

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