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Maryland Real-Time Water Quality
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01649500
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Model Info
USGS station:
01649190 Paint Branch Near College Park, MD
01649500 Northeast Branch Anacostia River at Riverdale, MD
01651000 Northwest Branch Anacostia River near Hyattsville, MD
01658000 Mattawoman Creek near Pomonkey, MD (discontinued July 2011)
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Constituent:
Computed discharge
Specific conductance at 25 degrees Celsius
pH
Water temperature
Turbidity
Diss. oxygen
Computed total nitrogen, 2007-2018
Computed total phosphorus, 2004-2005
Computed total phosphorous, 2007-2018
Computed E. coli, 2007-2018
Computed suspended sediment, 2004-2005
Computed suspended sediment, 2007-2018
concentration
load
hourly
daily
Time period:
Year 2005
Year 2004
All
Month
1st Quarter (Jan-Mar)
2nd Quarter (Apr-Jun)
3rd Quarter (Jul-Sep)
4th Quarter (Oct-Dec)
Model Form:
1. - Present
Model Form #1
log
10
(
SS
) = - 0.8655 + 0.4228 log
10
(
TURB
) + 0.8201 log
10
(
Q
)
where:
SS
is computed suspended sediment, in milligrams per liter
TURB
is turbidity, in formazin nephelometric units
Q
is computed discharge, stage-discharge rating curve, in cubic feet per second
Model Calibration
Basic Data
Number of measurements:
73
Mean squared error:
0.04605316
Multiple R
2
:
0.95
Bias correction (smearing) factor:
1.05
Explanatory Variables
Variable
Value
Standard error
Intercept
-0.8655
0.1179
log
10
(
TURB
)
0.4228
0.0648
log
10
(
Q
)
0.8201
0.0779
Correlation Matrix
Intercept
log
10
(
TURB
)
log
10
(
Q
)
Intercept
1
0.5973
-0.8832
log
10
(
TURB
)
0.5973
1
-0.8911
log
10
(
Q
)
-0.8832
-0.8911
1
Reference
Miller, C.V., Gutierrez-Magness, A.L., Feit Majedi, B.L., and Foster, G.D.
, 2007,
Water quality in the Upper Anacostia River, Maryland: Continuous and discrete monitoring with simulations to estimate concentrations and yields
: U.S. Geological Survey Scientific Investigations Report 2007-5142, 43 p.
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