Chemical and Water Quality Kinetic Characteristics and Processes - Hydro-Environmental Analysis: Freshwater Environments - page 393

Ammonium ion wet deposition, 2006

1.0

0.6
1.5

1.0 1.3

1.1
1.6
1.6

0.6

0.3

0.9

0.7

3.0

0.9

0.9
0.3

0.5

1.9

2.7 2.0

2.2 2.4
2.8 2.8
2.9
3.8 3.1

3. 2.5

3.2 2.5

2.2

1.7

0.3 1.4

2.5
2.9
4.6
4.6

0.6

1.9

1.8

3.2

2.4

2.3
2.3
2.4 2.9 2.2
1.8

1.8

0.1 0.8

4.0 3.3

3.7 2.2

3.2

4.1
2.6

1.1 1.3

4.2

0.8

0.1
0.5

0.4

5.1 3.1 4.3

4.0 4.9
5.0

3.0
3.0 3.3
3.2

0.5

2.8

4.5
4.6

5.2

0.4

3.7 3.1

0.2 3.0 0.7

4.1 3.7

5.3

2.3 2.6

5.6 5.6

4.2

0.2

1.9

1.3 2.5

3.4
3.4

2.0

2.4
3.1

0.7 3.2 4.3 5.4

4.1

3.2

0.6

0.6 5.3 3.2

2.5

2.6

1.6

4.0

2.8 2.2

2.7

3.9 4.9

0.8

1.5 1.5 3.0

2.3
2.0
5.1

0.8 4.1

4.1

0.2 0.9 1.9 3.4

3.4

0.7 0.7 3.0

3.5 4.4

3.1

3.3 2.9

2.9

3.3

3.3

4.3

1.8 2.7

0.9 1.4 2.9

1.8

4.0 2.4

2.2

2.6

4.6

0.6 4.1 2.9

Ammonium as NH +
(kg/ha)

0.9

1.7

1.7
1.2

2.7

2.1

4.8

3.0 0.9

0.7 1.9

1.5

1.2

≤0.5

3.1 2.1

1.6 0.9

0.5-1.0

3.3 1.4

2.1 1.7

Sites not pictured:
AK01
AK03
PR20
VI01

1.0-1.5

2.2 1.7

1.6

1.5-2.0

1.6

< 0.1 kg/ha
0.1 kg/ha
1.2 kg/ha
0.2 kg/ha

3.2

0.8

2.4

1.7

1.7

2.0-2.5

0.9 0.9

2.5-3.0

0.9

1.3

1.6

3.0-3.5

2.5

3.5-4.0

2.3

4.0-4.5

>4.5

Inorganic nitrogen wet deposition from nitrate
and ammonium, 2006

2.2

1.2 1.4 2.3

1.0

0.9

1.1

1.0

2.2

3.6

1.2

2.3

0.8

3.0 2.4

3.2 3.0

3.3

1.1

3.6 4.3

4.4 2.9

4.2

4.0
4.0

3.4

0.5 1.8 3.6

0.9 3.9 3.9

0.9

3.5

3.5

3.4

4.0 4.3

4.6

3.6 4.2

1.1

0.2 4.8 5.1 4.6

3.5 4.9 5.4 6.9

4.2

5.9

1.5

4.7 4.5

1.0 1.8 6.7

0.3 0.7

0.7

7.3 4.3

4.6

5.7 4.2

5.1

5.1

6.8 6.8

5.3
5.2

5.4

3.5

0.8

6.3 7.0

0.7 6.6

6.5

0.4 3.2 1.1 6.3

6.5 6.2

6.1

4.8 6.7
4.7

5.2

2.2 3.1 6.5 8.1

0.2 5.4

3.4

2.2 4.1

3.8 3.3

3.6
2.6
2.5

7.6

1.2 6.1 6.0

4.2

1.3 7.6

7.2

4.2
4.3

0.9 5.6 4.1

5.5

5.9

4.0 3.7

4.7

1.3 4.5

5.1

6.2 4.1

1.4 2.0 1.9

0.3 4.7

4.7

1.5 4.1 5.0

0.9 6.7 3.4

4.9

6.2

5.0 5.0

4.6 6.2

4.7
4.4

4.6

6.6

2.5 1.4

2.1 4.4 3.3

3.3

4.1 3.7 4.2

5.0

5.5

N
(kg/ha)

1.2

5.3 4.4

1.3

3.1 3.1
2.1
2.5

4.2

3.2 6.0

4.3 2.4

≤1.0 1.1 2.9 1.7

1.0-2.0

4.2 3.6

2.5

1.8
2.8

2.0-3.0

2.7 4.6

2.9

3.0

3.8

3.0-4.0

Sites not pictured:
AK01
AK03
PR20
VI01

3.2

2.1

4.0-5.0

0.1 kg/ha
0.1 kg/ha
3.1 kg/ha
0.7 kg/ha

4.9

3.8 1.8

2.5

3.7

1.2 2.2

5.0-6.0

2.7

6.0-7.0 1.9

3.1

>7.0

3.0

4.2

FIGURE 14.23 Wet deposition nitrogen loads for 2006. (From the National Atmospheric Deposition Program/
National Trends Network. http://nadp.sws.uiuc.edu.)