Deposition
(under development)
While this site is under development, you can visit http://www.umaine.edu/DrSoils/nadp/NADP.HTML to learn more about typical forested terrain precipitation in Maine. Below is a table of throughfall and stemflow data from BBWM.
Volume-weighted mean throughfall and stemflow chemistry by for combined treated and reference
by vegetation type for the period 1988 through 1992 (from Fernandez et al. 1999).
|
|
Throughfall |
Stemflow |
||||||
|
|
Hardwood |
Softwood |
Hardwood |
Softwood |
||||
|
H |
22 |
a |
72 |
b |
1 |
a |
154 |
b |
|
Ca |
22 |
a |
39 |
b |
42 |
a |
105 |
b |
|
Mg |
15 |
a |
24 |
b |
20 |
a |
41 |
b |
|
K |
41 |
a |
43 |
a |
419 |
a |
71 |
b |
|
Na |
24 |
a |
52 |
b |
30 |
a |
80 |
b |
|
SBC |
103 |
a |
185 |
b |
509 |
a |
297 |
a |
|
NH4 |
11 |
ab |
10 |
a |
5 |
a |
10 |
a |
|
Al |
0.3 |
a |
0.8 |
b |
0.3 |
a |
1.6 |
b |
|
Si |
2.6 |
a |
1.2 |
b |
46 |
a |
2.3 |
b |
|
SO4 |
56 |
a |
109 |
b |
97 |
a |
236 |
b |
|
NO3 |
20 |
a |
43 |
b |
12 |
a |
48 |
b |
|
Cl |
31 |
a |
65 |
b |
40 |
a |
93 |
b |
|
SAA |
108 |
a |
218 |
b |
149 |
a |
377 |
b |
|
ANC |
-8 |
a |
-78 |
b |
294 |
a |
-122 |
b |
|
DOC |
475 |
a |
886 |
b |
1152 |
a |
2421 |
b |
|
n |
455-466 |
|
143-151 |
|
146 |
|
82-90 |
|
Lower case letters indicate significant differences between vegetation types. Units are umol/L for Al and Si, umol C/L for DOC, and ueq/L for all others.
