Environmental Engineering Reference
In-Depth Information
(a)
1986 Annual Precipitation - Weighted pH
4.5
5.4
5.3
4.4
5.2
4.6
4.5
5.4
5.4
5.2
4.6
5.4
5.4
5.4
5.3
4.5
4.5
5.4
5.2
5.6
5.4
5.6
5.2
5.5
5.2
5.5
5.4
5.6
5.4
5.4
5.0
5.1
4.
5.7
5.1
5.1
5.6
4.9
5.3
5.1
5.2
4.9
5.1
5.2
5.3
4.7
5.2
5.1
5.1
1986 Annual Hydrogen Ion Deposition - kg ha
-1
(b)
0.36
0.17
0.15
0.03
0.48
0.08
0.15
0.07
0.07
0.21
0.42
0.02
0.29
0.01
0.07
0.50
0.04
0.03
0.02
0.35
0.07
0.43
0.10
0.03
0.46
0.01
0.01
0.03
0.05
0.01
0.01
0.04
0.01
0.04
0.01
0.01
0.04
0.04
0.04
0.0
0.01
0.03
0.03
0.02
0.08
0.01
0.01
0.05
0.05
0.02
0.06
0.04
0.07
0.02
0.06
0.07
Figure 9.9
(a) 1986 annual precipitation-weighted pH, (b) annual hydrogen ion deposition, kg ha
−
1
.
(Adapted from National Acid Precipitation Assessment Program, 1991. Washington, D.C.: Government
Printing Office.)
