Chesapeake Bay Coastal Bays Rivers and Streams Watersheds
Maryland Department of Natural Resources
Fixed Station Monthly Monitoring
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Lower Potomac River - Indian Head (TF2.3)

Map Showing the Location of TF2.3

Location:
Indian Head Point on the Potomac River, Near Marbury and Potomac Heights

Coordinates (NAD83):
Latitude: 38.6082
Longitude: -77.1739

Description:
This station is a tidally influenced fresh water site in the mid-channel of the Potomac River, with an approximate depth of 45 feet.

Current Parameter: Water Clarity (Secchi Depth)

Choose Other Parameters:
Dissolved
Oxygen
Water
Temperature
Salinity pH Water
Clarity


The yellow shaded area represents the range of monthly mean values that have occurred from 1985 to 2012. The blue line shows the monthly mean values for each month over that same time period. The red line shows what the current years conditions are and how they compare to the range and the average values we've seen.

2013 Water Clarity (Secchi Depth)
Lower Potomac River / Indian Head (TF2.3)

Legend

Range 1985 to 2012 2013 Mean

Water Clarity (Secchi Depth) (meters)
Lower Potomac River / Indian Head (TF2.3)
Month Minimum Mean Maximum 2012 2013
January 0.10 0.40 0.80 0.50 0.60
February 0.20 0.47 0.90 0.50 0.20
March 0.10 0.49 1.00 0.30 0.50
April 0.20 0.59 1.00 0.50 0.70
May 0.25 0.66 0.90 0.70 0.70
June 0.30 0.64 1.00 0.80 0.60
July 0.30 0.58 0.80 0.50 0.50
August 0.35 0.59 0.80 0.70 0.40
September 0.20 0.60 0.90 0.60 0.60
October 0.40 0.60 0.90 0.60 0.70
November 0.20 0.60 1.00 0.40 0.50
December 0.20 0.47 1.00 0.60 0.40

*Bottom - "Secchi Disk Was Visible On Bottom":
When the Secchi disk is still visible on the bay floor it means that the water is clear enough for light to penetrate to the depth of the disk, reflect off of the disk, and reach the surface of the water again. Most of the time, this means that there is enough light for submerged aquatic plants to grow to that depth.


NOTE: Results displayed are provisional and have not undergone full Quality Assurance procedures. Although Maryland DNR believes the data presented here are correct, we cannot guarantee their accuracy at this time.

Choose Other Parameters:
Dissolved
Oxygen
Water
Temperature
Salinity pH Water
Clarity

Return to the MapReturn to the Station Map

Additional water quality data, including nutrient data, is currently available through the Chesapeake Bay Program Data Hub.

Contact MD DNR's Resource Assessment Service at (410) 260-8630
or by email at eyesonthebay@dnr.state.md.us.


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