55
Annexure - II:
Distribution of trees in different girth classes in municipal corporation areas
Girth class
in cm
Municipal Corporations
Total
Gandhinagar Ahmedabad Surat
Vadodara Rajkot
Rajkot Junagadh Jamnagar
10-30
220,150 119,030 97,730 269,690 38,870 38,870 18,350
7,420 917,620
31-60
306,310 153,310 150,620 234,140 56,140 56,140 26,870
13,670 1,121,410
61-90
212,890 154,690 66,330 148,170 26,140 26,140 15,060
12,870 737,110
91-120
81,360
78,870 13,450 47,040 9,110 9,110 6,890
4,860 262,320
121-150
27,410
56,730 3,850 27,130 3,780 3,780 4,280
2,950 138,860
151-200
14,370
32,530 1,610 13,270 1,980 1,980
3640
2,130 80,570
201-250
2,870
14,150
390
5,280 770 770
900
1,130 28,080
250 -300
870
6,420
20
1,970 340 340
550
310 11,040
Above 300
440
2,310
5
500 410 410
150
20
4,435
Note: Above figures have been rounded in tens
The graph (Fig. 9) representing distribution of trees in different girth reveal that the numbers of
young trees are relatively less compared to the trees in middle and higher age or girth. Normally, the
compositions of trees represent a normal distribution curve in natural areas, but in the municipal
corporation areas, the trees having girth above 60 cm have normal distribution, except young trees
having GBH between 10 to 60 cm, as the number in this girth class is low. Actually, the number of
trees between 10 and 30 cm is only sixty percent of the number that is expected in case of normal
distribution of trees in the girth classes. It is possible that enumerators ignored very young trees
having GBH very close to 10 cm while enumerating them. In forestry, normally the trees having
GBH over 30 cm are considered established ones for enumeration and the rest of young trees
are never accounted in counting. Thus, Foresters normally ignore such big sapling or young tree/
plants. Although the enumerators were asked to count such young trees, perhaps all such plants are
missed in counting due to mind set of foresters. It is also true that the societies, colonies have been
established in new areas at the cost of trees but they could not raise adequate number of trees due
to lack of space. Old gardens, forest blocks and old tree groves have middle to old age trees which
were raised a few decades ago. In some cities, the scale of plantation was good during the recent
years but the survival percent was low.
Gandhinagar being a new city, established four decades ago, the number of very old and large trees
is less. On other hand, number of large trees is relatively high in Ahmedabad as they were palnted
several decade ago before the Independence.
