Table 6. Range of measured values at calibration sites and goodness-of-fit statistics averaged over all calibration sites.
[Abbreviations: °C, degrees Celsius; L, liter; m, meter; mg, milligram; mL, milliliter; µm, micrometer; <, less than; rl, reporting level]
Constituent |
Unit |
Data type |
Range of
measured
values |
Year |
Mean
error |
Mean
absolute
error |
Root mean
square error |
Water temperature |
°C |
Hourly |
0–28 |
2006 |
-0.01 |
0.54 |
0.69 |
| | | |
2007 |
0.06 |
0.64 |
0.78 |
| | | |
2008 |
0.17 |
0.63 |
0.80 |
| | | |
2009 |
-0.17 |
0.58 |
0.72 |
Dissolved oxygen |
mg/L |
Hourly |
0–20 |
2006 |
0.12 |
1.12 |
1.57 |
| | | |
2007 |
0.51 |
1.30 |
1.84 |
| | | |
2008 |
-0.19 |
1.01 |
1.47 |
| | | |
2009 |
-0.66 |
1.30 |
1.77 |
Ammonia |
mg/L |
Grab |
<rl–1.7 |
2007 |
0.05 |
0.12 |
0.17 |
| | | |
2008 |
-0.08 |
0.21 |
0.25 |
Nitrate |
mg/L |
Grab |
<rl–0.8 |
2007 |
0.01 |
0.03 |
0.03 |
| | | |
2008 |
0.01 |
0.03 |
0.03 |
Particulate nitrogen |
mg/L |
Grab |
0.06–4.0 |
2007 |
-0.18 |
0.28 |
0.48 |
| | | |
2008 |
-0.15 |
0.24 |
0.38 |
Total nitrogen |
mg/L |
Grab |
0.6–5.9 |
2007 |
0.11 |
0.41 |
0.58 |
| | | |
2008 |
-0.03 |
0.38 |
0.48 |
Orthophosphorus |
mg/L |
Grab |
0.01–0.27 |
2007 |
0.01 |
0.03 |
0.05 |
| | | |
2008 |
0.00 |
0.03 |
0.03 |
Total phosphorus |
mg/L |
Grab |
0.06–0.50 |
2007 |
0.00 |
0.05 |
0.07 |
| | | |
2008 |
0.00 |
0.04 |
0.05 |
Blue-green algae |
µm3/mL |
Grab |
0–113×106 |
2007 |
-3.3×106 |
7.5×106 |
14.9×106 |
| | | |
2008 |
0.5×106 |
3.6×106 |
5.8×106 |
Particulate carbon |
mg/L |
Grab |
0.5–18 |
2007 |
0.15 |
1.44 |
2.26 |
| | | |
2008 |
0.61 |
1.38 |
1.96 |
Dissolved organic carbon |
mg/L |
Grab |
5–14 |
2007 |
0.36 |
0.75 |
1.15 |
| | | |
2008 |
-0.19 |
0.65 |
0.81 |
|
First posted July 14, 2011
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