97
-20
20
40
60
0
9 I,,
-20 ,~
o~
I
201'
I
9
4011
." Mn 2+ (pM)
'
~
60~
i
i
100
2oo
3oo
0
NO 3" (mM)
n
n
0.4
0.8
-201
01
201
401
.
60!
~
.2
0
Fe2+(mlvl)
--, -20
8 20
4O
0
-20
9 "
=
=
.~
0 ~,
20 9
40 9
2S O 4
(raM)
60 9
,
a
,
,
~
0.2
0.4
016
0
-20
0
20
6O
5
I0 15 20 0
4 0
9
alkalinity (meq/])
4
8
1'2 16
-20
20
40
w
-20 r
01
pH
-2: h
F_..h (my)
60
o
200
3oo 6
.
9 - 2 0 0 - , ~
o
noo 200
Fig. 4.54. Porewater profiles from thesediments of the Oka River (Kolomna, Russia)