Karnataka - Ministry of Environment and Forests

7.1 DISTRICT-WISE WETLAND MAPS AND STATISTICS
Over all the wetlands account for 3.4 per cent of geographical area of the state with all of them falling less
than one per cent under wetlands to the geographical area of the districts. District-wise distribution of
wetlands shown that Dharwad, Kodagu and Gadag contribute less than one per cent to the total area under
wetlands. On the other hand Uttara Kannada, Shimoga and Tumkur comprise 6 to 8 per cent of total area
under wetlands (Table 6). Rest of them range in between 1 to 6 per cent. In terms of extent, Dharwad has
least extent of wetlands (3965 ha) while Tumkur has registered highest area (50608 ha). Overall there is a
reduction of 39 per cent area in the open water from post-monsoon (427921 ha) to pre-monsoon (262991 ha).
The seasonal change is least in Udupi (2 %) while highest in Koppal (80 %). Shiomga district ranked first in
terms of open water spread (41254 ha) in post-monsoon while Uttara Kannada district registered highest
(32070ha) in pre-monsoon season. Wetland statistics followed by wetland map and corresponding satellite
data for each district is given to have a fairly good idea about the distribution pattern and density of wetlands
in the district. District-wise distribution of wetlands is depicted graphically in figure 11.
Table-6: District-wise wetland area
Sr.
No.
District
Area of
district
(km 2 )
Wetland
area (ha)
% of
total
wetland
area
% of
district
area
Open water extent
(ha)
Postmonsoon
Premonsoon
Seasonal
change
(%)
1 Belgaum 13415 33412 5.2 0.2 22090 13639 -38
2 Bagalkot 6594 37470 5.8 0.2 34770 14577 -58
3 Bijapur 10475 33143 5.1 0.2 25935 12204 -53
4 Gulbarga 16224 34741 5.4 0.2 24484 20125 -18
5 Bidar 5448 10586 1.6 0.1 7697 5326 -31
6 Raichur 5559 27820 4.3 0.1 22041 13270 -40
7 Koppal 8458 25046 3.9 0.1 20453 4011 -80
8 Gadag 4657 4248 0.7 0.0 3579 2358 -34
9 Dharwad 4230 3965 0.6 0.0 2603 2075 -20
10 Uttar Kannada 10291 42190 6.6 0.2 35487 32070 -10
11 Haveri 4851 9353 1.5 0.0 5704 3728 -35
12 Bellary 8419 33372 5.2 0.2 28241 7640 -73
13 Chitradurga 8388 27486 4.3 0.1 14836 9137 -38
14 Davanagere 6018 16886 2.6 0.1 9171 6152 -33
15 Shimoga 8465 46131 7.2 0.2 41254 26184 -37
16 Udupi 3598 12226 1.9 0.1 9899 9739 -2
17 Chikmagalur 7201 23420 3.6 0.1 18795 12188 -35
18 Tumkur 10598 50608 7.9 0.3 16873 12024 -29
19 Kolar 8223 36538 5.7 0.2 5823 3320 -43
20 Bangalore -Urban 2190 8620 1.3 0.0 2518 2254 -10
21 Bangalore Rural 5815 19132 3.0 0.1 4205 3867 -8
22 Mandya 4961 23418 3.6 0.1 14009 9561 -32
23 Hassan 6814 32564 5.1 0.2 18590 11143 -40
24 Daksina Kannada 4843 10911 1.7 0.1 9558 8344 -13
25 Kodagu 4102 4018 0.6 0.0 3024 2029 -33
26 Mysore 6269 25243 3.9 0.1 21864 12410 -43
27 Chamrajnagar 5685 11029 1.7 0.1 4418 3616 -18
Total 191791 643576 100.0 3.4 427921 262991 -39
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