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Table 3 Main statistical descriptors of nutrients and oxygen saturation (DO) data at the 154 reference sites

From: Italian reference rivers under the Water Framework Directive umbrella: do natural factors actually depict the observed nutrient conditions?

 

DO

NH4-N

NO3-N

TP

 

%

mg l−1

mg l−1

mg l−1

Mean

96.09

0.026

0.666

0.030

SD

9.89

0.021

0.784

0.024

cv%

10.3

80.6

117.7

77.6

Minimum

65.0

0.001

0.005

0.001

10th

85.25

0.007

0.140

0.006

Median

97.58

0.020

0.403

0.028

75th

100.0

0.030

0.879

0.049

90th

104.9

0.047

1.392

0.060

Maximum

146.00

0.126

5.640

0.128