CHAPTER 17 . Sustainable Developmental Planning in Ecologically Sensitive Dahanu Region
317
Table 17.2. Phytoplankton analysis of surface waters during low tide (day) from Dahanu creek in October 1991 and October 1996
Sam- Percent in groups
ChloroTotal N°
Shannon Weaver
station phyceae
phyceae
phyceae
phyceae
phyceae
per 100 ml
diversity index
1991 1996 1991 1996 1991 1996 1991 1996 1991 1996 1991 1996 1991 1996
n.s.
17.00
n.s. 25.00
n.s.
58.00
n.s.
n.s.
1600
n.s. 2.99
n.s.
7.00
n.S.
10.34
n.S. 48.30
n.s.
38.36
n.s.
n.s.
1933
n.s. 2.62
n.S.
23.34
13.00 10.00
26.10 63.33 60.90 3.33
1500
966 3.29
2.41
4
n.s.
28.57
n.s.
9.53
n.s.
61.90
n.s.
n.s.
2100
n.s. 3.05
n.s.
5
3.57
n.s.
7.14
n.s. 10.72
n.s.
78.57
n.s.
n.s.
1867
n.S. 2.36
n.s.
6
23.53
38.40 11 .76
23.10 64.71
38.50
850
1079
2.68
1.92
n.s.
3.57
n.s. 17.86
n.s.
78.57
n.s.
n.s.
2800
n.s. 2.81
n.s.
n.s.
12.50
n.s. 14.60
n.s.
64.56
n.s.
8.34
n.s.
3200
n.s. 2.95
n.s.
7.50
13.30 5.00 26.70 80.00 60.00 7.50
2667
945 3.18
2.26
10
n.s.
4.28
n.s.
6.38
n.s.
87.20
n.s.
2.14
n.s.
3133
n.s. 2.43
n.s.
11
n.s.
n.s.
161 .6
n.S.
33.3
n.s.
50.1
n.s.
n.s. 1008 n.s.
2.31
- Absent, n.s.: not sampled.
* Diversity index, indicative of ecologica l hea lth, has decreased in October 1996 compared to Octo ber 1991.
Fig. 17.2. Ecological pyramids
Ideal pyramid
C4 :0.10fO
for Dahanu creek in October
O:O.lofC2
1991 and October 1996 (based
C2:0.10fC1
on biomass: kg dry wt km-' )
C1 :0,1 ofP
D
P
D
October 1991
October 1996
• Typology of industries to be permitted in ecologically fragile Dahanu region;
• Examination of the effect of thermal power plant operating in Dahanu region.
The Institute's report submitted to the judiciary in October 1996 dealt with the
afforereferred issues and presented its findings, conclusions and recommendations on
each issue as delineated below.