Koontz, J., D.G. Huggins, C.C. Freeman, D.S. Baker - Central Plains ...

Figure 34. Error bar plots of mean conductivity values for samples grouped by ecoregion.
CDF
100
90
80
70
60
50
40
30
20
10
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Mean Conductivity mS/cm
Figure 35. Cumulative distribution frequency (CDF) of mean conductivity for reference (Phase
I) and random (Phase II) populations.
Mean conductivity correlated significantly with many other water quality and FQA parameters
and spatio-temporal features (Table 9). If we consider that conductivity is the measure of the
ionic strength of the water, then measurable concentrations of nutrients and contaminants would
in theory define the ionic activity in the water (i.e. conductivity). Other correlations, though
significant, may play some role in defining the conductivity, but only in as much as those
parameters relate to inherent concentrations of ions measured. Herbicides levels go down as
conductivity increases indicating that herbicides are not contributing to conductivity values but
are merely related to conductivity levels.
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Phase One
Phase Two