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Table 17 Dynamics of fresh water use over the kinds of economic activities in South America , km 3 /yr
 
Water user  
Assessment
Forecast
  1900  1940  1950  1960  1970  1980  1990  1995 2000  2010  2025
Population, mln
110
144
188
240
294
326
356
413
494
Irrigation area, mln ha
1.2
2.2
4.81 
4.97 
6.24 
7.9 
8.76 
9.06
9.35 
10 
10.4
Agriculture
13.2
28.1
40.6
51.1
61.3
77.5
92.8
97.9
101
107
115
 
10.3
21.3
30.1
36.8
44.0
54.6
64.7
68.3
70.8
74.8
80.9
Public Supply
0.7
2.6
4.7
6.5
10.3
15.9
25.9
28.8
32.1
42.6
58.9
 
0.2
0.6
0.8
1.0
1.5
2.2
3.4
3.6
3.7
4.5
5.6
Industrial
1.2
1.8
3.9
7.3
11.3
15.9
22.3
25.8
30.3
42.2
61.9
 
0.2
0.3
0.6
1.0
1.5
1.9
2.5
2.9
3.4
5.2
9.9
Reservoirs 
0.0
0.1
0.2
0.7
4.1
8.0
11.3
14.6
18.0
21.2
24.0
Total 
15.1
32.6
49.3
65.6
87.0
117
152
167
182
213
260
 
10.8
22.3
31.7
39.6
51.1
66.7
81.9
89.4
96.0
106
120

Note: Nominator – water withdrawal, denominator – water consumption.