The impact of urban groundwater upon surface water - eTheses ...

(a)
(c)
(e)
Depth below river bed (cm)
Depth below river bed (cm)
Depth below river bed (cm)
0 2 4 6 8
0
20
pH
D.O
40
60
Surface
Water
80
100
120
140
Dissolved Oxygen (mgl -1 )/ pH
Concentration (meql
0.00
0
0.10 0.20 0.30 0.40 0.50
-1 )
20
40
60
80
100
120
140
Riverbank piezometer, lateral off-set 10m,
depth 2.5 m.
Mn
Fe
Cr
Concentration (meql
0.00
0
0.02 0.04 0.06 0.08 0.10 0.12
-1 )
20
40
60
80
100
120
140
As
Cd
Pb
(b)
Depth below river bed (cm)
Depth below river bed (cm)
Depth below river bed (cm)
Concentration (meql
0 2 4 6 8 10 12
0
20
40
-1 )
Cl
NO3
SO4
60
80
100
120
140
Concentration (meql
0 5 10
0
-1 )
20
40
60
80
100
120
140
Cu
Ni
Zn
Concentration (meql
0.0000
0
0.0002 0.0004 0.0006 0.0008 0.0010 0.0012 0.0014
-1 )
Figure 7.19 Water quality results (8/8/01) from the western multilevel riverbed piezometer at
Profile 8.
(d)
(f)
20
40
60
80
100
120
140
Hg
15