Fig. 8.3
Spatial analysis plot and GIS map of FL4 data (Ni, Cr, Mg
and Co). Outlier sites: St. 14, 24, 41, 42, 47 . . . . . . . . . . . . . . . 94
Fig. 8.4
Spatial analysis plot and GIS maps of a FL5 data (K, Cl, P
and Na). Outlier sites: St. 7, 10, 11, 12, 27, 28, 32, 33; b FL6
data (Se, I and Br). Outlier sites: St. 2, 13, 14 . . . . . . . . . . . . . . 95
Fig. A.1 The histograms of data distribution of the selected elements
and the predicted normal distribution curves. . . . . . . . . . . . . . . . 101
Fig. A.2 EWMA charts of concentration data after excluding the outlier
sites (when CV% > 50%, indexed as Me_1 in the graph,
N = 47—the number of outlier sites) and of original data
(CV% < 50%, indexed as Me in the graph, N = 47) . . . . . . . . . 103
List of Figures
xxiii