Environmental Engineering Reference
In-Depth Information
Table 7.7
Variation of pH in different phases of Phailan
Stations
Surface water pH (Phase A)
Surface water pH (Phase B)
Surface water pH (Phase C)
Stn. 1
8.15
±
0.02
8.17
±
0.03
8.16
±
0.03
8.11
±
0.03
8.12
±
0.03
8.11
±
0.03
Stn. 2
Stn. 3
8.10
±
0.02
8.10
±
0.03
8.10
±
0.02
Stn. 4
8.00
±
0.02
8.00
±
0.02
8.00
±
0.02
Stn. 5
7.96
±
0.03
7.97
±
0.02
7.96
±
0.02
Phase A
pre-Phailin period (5 October 2013);
Phase B
Phailin phase (16 October 2013);
Phase C
post-Phailin phase
(5 November 2013)
Fig. 7.27
Variation of pH
during pre-Phailin (Phase
A), Phailin (Phase B) and
post-Phailin (Phase C)
periods
Table 7.8
Variation of DO (in ppm) in different phases of Phailan
Stations
Surface water DO (Phase A)
Surface water DO (Phase B)
Surface water DO (Phase C)
Stn. 1
5.73
±
0.02
4.98
±
0.03
5.33
±
0.04
Stn. 2
5.43
±
0.02
5.00
±
0.02
5.22
±
0.03
Stn. 3
6.63
±
0.03
6.03
±
0.02
5.98
±
0.02
6.55
±
0.03
5.89
±
0.03
6.10
±
0.04
Stn. 4
Stn. 5
4.80
±
0.03
4.74
±
0.03
4.91
±
0.02
Phase A
pre-Phailin period (5 October 2013);
Phase B
Phailin phase (16 October 2013);
Phase C
post-Phailin phase
(05 November 2013)
Table 7.9
Variation of chlorophyll
a
and phytoplankton in different phases of Phailan
Stations
Chlorophyll
a mg/m
3
(Phase A)
Chlorophyll
a mg/m
3
(Phase B)
Chlorophyll
a mg/m
3
(Phase C)
Phytoplankton
Nos./L (Phase
A)
Phytoplankton
Nos./L (Phase
B)
Phytoplankton
Nos./L (Phase
C)
Stn. 1
3.98
±
0.02
6.02
±
0.05
4.98
±
0.04
57,004
78,201
69,276
Stn. 2
3.47
±
0.05
5.14
±
0.04
4.54
±
0.03
50,221
75,337
70,114
Stn. 3
3.30
±
0.05
4.64
±
0.03
4.33
±
0.02
42,541
69,881
65,103
0.04 38,697 68,442 62,998
Stn. 5 2.98
±
0.04 4.09
±
0.04 3.64
±
0.03 32,494 65,310 63,812
Phase A pre-Phailin period (5 October 2013); Phase B Phailin phase (16 October 2013); Phase C post-Phailin phase
(05 November 2013)
Stn. 4
3.29
±
0.01
4.12
±
0.06
4.08
±
