. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. ATMOSPHERIC DEPOSITION TRENDS IN ILLINOIS. IL19 IL18 IL11 IL47 IL35 IL63 Site ID Figure 31. Box plots of the dryfall loadings for large-particle sulfate (kg ha' yr') measured at six NADP/NTN sites in Illinois (see table 1 for precise sampling intervals included, which vary slightly for each site). Table 3. Changes in Concentrations of Major Inorganic Ions in Illinois Precipitation Number with signif
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. ATMOSPHERIC DEPOSITION TRENDS IN ILLINOIS. IL19 IL18 IL11 IL47 IL35 IL63 Site ID Figure 31. Box plots of the dryfall loadings for large-particle sulfate (kg ha' yr') measured at six NADP/NTN sites in Illinois (see table 1 for precise sampling intervals included, which vary slightly for each site). Table 3. Changes in Concentrations of Major Inorganic Ions in Illinois Precipitation Number with significant Ions Ca* NH4* NO,- SO/ pH Number of sites chan ge* Percentile Up Down Up Down 25 1 6 0 3 50 0 7 0 2 75 1 6 0 2 25 3 4 0 1 50 3 4 0 1 75 3 4 0 0 25 2 5 0 0 50 2 5 0 1 75 1 6 0 0 25 0 7 0 3 50 0 7 0 0 75 1 6 0 1 25 7 0 0 0 50 6 1 0 0 75 5 2 0 0 Note: ?Using a Spearman rank correlation test, reject H„ (5 percent level): no change in concentration. 191. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Dept. of Energy and Natural Resources; Critical Trends Assessment Project. Springfield, Ill. : Ill. Dept. of Energy and Natural Resources
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