Results and Discussion
ESRs in the district are prioritized considering biological,
ecological, geo-climatic, renewable energy and social prospects.
Weightages are assigned to the grids for prioritizing
eco-sensitiveness based on the relative significance of themes
based on the aggregate metric score as ESR 1 (regions of highest
sensitivity), ESR2 (regions of higher sensitivity), ESR3
(regions of high sensitivity) and ESR4 (regions of moderate
sensitivity), respectively. Land use of 2013 is assessed using
remote sensing data of Landsat ETM+ sensor 30 m resolution.
Land-use analysis reveals that the region has about 32.08% under
evergreen–semi-evergreen forests (Table 2),
and higher forest cover (>80%) is confined to the grids in
Sahyadri region (Supa, Yellapura, Ankola, Sirsi taluks). The
coastal taluks are having forest cover in the range 60–80%
towards eastern part, whereas western side totally degraded due
to higher pressure. The plains show least cover (<20%)
reflecting higher degradation, and the natural forest cover in
the district is only 542,475 Ha. The land clearing and
subsequent Table 2 Land use and
fragmentation of forests in Uttara Kannada
Category |
Land-use analysis |
Fragment type |
Spatial extent |
Ha |
% |
Ha |
% |
Built-up |
31589 |
3.07 |
Transitional |
59435 |
5.78 |
Water |
28113 |
2.73 |
Perforated |
8909 |
0.87 |
Cropland |
145395 |
14.13 |
Open fields |
37660 |
3.66 |
Patch |
30618 |
2.98 |
Moist deciduous forest |
161996 |
15.74 |
Evergreen to semi-evergreen forest |
330204 |
32.08 |
Edge |
179870 |
17.48 |
Scrub/grass |
40402 |
3.93 |
Acacia/Eucalyptus/hardwood plantations |
122927 |
11.94 |
Interior |
263643 |
25.62 |
Teak/bamboo/softwood plantations |
67111 |
6.52 |
Coconut/arecanut/cashew nut plantations |
53993 |
5.25 |
Non-forest area |
486611 |
47.3 |
Dry deciduous forest |
9873 |
0.96 |
Total area (Ha) |
1029086 |
agricultural expansion, exotic plantations resulted in the
degradation of large forest patches at temporal scale.
Weightages were assigned to the grids based on the extent of
forest cover, and grids in Sahyadri region have highest ranking
(10) compared to plains (1). Fragmentation analysis considering
the spatial extent of forests reveals that contiguous forests
(interior forests) cover only 25.62%, and land use under non-
forest categories (cropland, plantations, built-up, etc.) covers
47.29% of the landscape across coast, Sahyadri and plains.
Flora and fauna of terrestrial and aquatic ecosystems have been
studied through field investigations and compilation of
information from published literature. These strategies helped
in documenting 1068 species of flowering plants, representing
138 families. Grids in Honnavar, Kumta, Sirsi, Bhatkal, Siddapur
are with higher weights, and Mundgod and Haliyal show least
endemism [29].
Analysis of faunal distribution shows that tiger (Panthera
tigris), leopard, wild dog (dhole) and sloth bear are the
main predators. The district is a paradise for birds; 272 birds
are listed in the Dandeli, out of which 19 are considered to be
endemic [36]. The distribution of
freshwater fishes is highly correlated to terrestrial landscape
elements, of which quantity and quality of evergreen forests are
more important [2]. Higher
weightages (10) are assigned to the grids with endemic species,
and least (3) were assigned for grids with non-endemic fauna.
Biomass is estimated grid-wise, based on the spatial extent of
forest and per hectare basal area. The total biomass of the
district is 113823.58 Gg, with Sahyadrian
taluks such as Supa, Sirsi and Yellapura having greater biomass
(>1200 Gg) followed by the coastal taluks (Karwar, Ankola, Kumta, Honnavar). Grids with
higher standing biomass regions were assigned higher weightages
[26, 39],
as these regions help in maintaining global carbon through
sequestration. Tree diversity is computed through the Shannon
diversity index which shows that most evergreen to
semi-evergreen forests with diversity values ranging between 3
and 4. Uttara Kannada district has two important protected
areas, namely Anshi National Park and Dandeli Wildlife
Sanctuary, which are assigned higher weights as they are key
eco-sensitive regions with diverse biodiversity [40].
Geo-climatic variables such as altitude, slope and rainfall are
analysed to identify sensitive zones. Highest elevation is 758 m
in Supa taluk. Grids with elevations
>600 m as higher priority for conservation and > 400 m is
moderate and rest is of least concern. Rainfall pattern shows
that the district falls in the high rainfall zone, except
Mundgod and eastern parts of Haliyal, Yellapura. Grids are
assigned weights based on the quantum and duration of rainfall [40]. The sub-basin-wise field
investigations were carried out to account perennial, seasonal
flows of the region. Hydrological regime analysis reveals the
existence of perennial streams in the catchment dominated by
diverse forests with native vegetation (>60% cover) compared
to the streams in the catchments of either degraded forests or
dominated by monoculture plantations [32]. Grids in Sahyadri regions
show 12-month water availability in the streams and were
assigned higher weightages. Streams in Haliyal, Mundgod, eastern
part of Yellapura have flow of only 4 months due to scarce
rainfall and monoculture plantations.
Environmentally sound alternative sources of energy resources
(solar, wind, io) potential were considered for prioritization [26, 33–36]. The region receives an
aver- age solar insolation of 5.42 kWh/m2/day
annually and has more than 300 clear sunny days. Wind resource
assessment shows wind speed varies from 1.9 m/s (6.84 km/hr.) to
3.93 m/s (14.15 km/hr.) throughout the year with a minimum in
October and maxi- mum in June and July. Bioresource availability
is computed based on the compilation of data on the area and
productivity of agriculture and horticulture crops, forests and
plantations. Sector-wise energy demand is computed based on a
primary household survey of 2500 households, the National Sample
Survey Organization (NSSO study) data and the information
compiled from the literature. The supply/demand ratio in the
district ranges from less than 0.5 to greater than 2. Sirsi,
Siddapur, Yellapur, Supa and eastern hilly areas of Kumta,
Honnavar and Ankola are fuelwood surplus regions. Hybridizing
wind energy systems with other locally available resources
(solar, bioen- ergy) would assure the reliable energy supply to
meet the energy demand at decen- tralized levels, and weights
were assigned based on the availability [33–36]. The location of
forest-dwelling communities such as Kunbis, Siddis, Goulis,
Gondas was spatially mapped, and the respective grids
were assigned highest weights, because these people are directly
and indirectly dependent on forest resources and have been
protecting forests. Grid-wise population is computed by
aggregating villages in the respective grid for 2011. Population
density is computed for each grid and weigh- tages were
assigned. Grids with the lowest population density (<50
persons) were assigned higher weight (considering the likely
lower anthropogenic stress) and vice versa [40, 41].
The four major estuaries, viz. Kali, Gangavali, Aghanashini, and
Sharavathi, are rich in mangrove species diversity and vital for
fishery and cultivation of Kagga rice (salt tolerant) varieties.
The biological diversity analysis shows Aghanashini and
Ganagavali estuaries have higher fish diversity and mangrove
species due to the absence of major anthropogenic activities
(dam or hydro projects). Estuaries such as Sharavathi and Kali
are severely disturbed with unplanned developmental activities [38, 39], which has affected the
productivity of livelihood resources (fish, bivalves, etc.).
Coastal grids were assigned weightages based on the biological
diversity and productivity (considering provisional goods—fish,
bivalves, sand and salt).
Aggregation of these spatial layers corresponding to biological,
ecological, geo- climatic, renewable energy and social variables
aided in prioritising the grids as ESR 1, ESR 2, ESR 3 and ESR
4, respectively, (Fig. 5a) based on
the composite metric score. Spatially, 52.38% of the district
represents ESR 1, 14.29% of area represents ESR 2, 13.1% of area
represents ESR 3 and about 20.23% of the district is in ESR 4.
Figure 5b depicts ESR with taluk and
gram panchayat (decentralized administrative units with a
cluster of few villages) boundaries. Uttara Kannada district has
11 taluks and 209 panchayats. ESR analyses reveal that ESR 1
consists of mainly Supa, Yellapura, Ankola, Sirsi, Siddapura,
Honnavar and Kumta taluks. Considering Panchayat-level analyses,
102 panchayats are in ESR 1, while 37 panchayats in ESR 2, 33
panchayats in ESR 3 and 37 panchayats in ESR 4. Sahyadri and
eastern part of coastal regions represent highest ecological
sensitiveness. ESR 2 is as good as ESR 1, except degradation of
forest patches in some localities. ESR 3 represents moderate
conservation region, and only regulated development is allowed
in these areas. ESR 4 represents less sensitiveness.
The visualization is implemented through open layers by adding
the WMS layer. Figure 6 visualizes
layer of Western Ghats boundary, Western Ghats states and dis-
tricts, Uttara Kannada Panchayats boundary on the backend layer
of OpenStreetsMap and also the land-use WMS layer of Bhuvan. The
user can choose different layers using the checkbox option and
view accordingly. This information contributes to ana- lyzing
and utilizing the resources in an efficient way, which helps the
decision-maker or the concerned citizen to use the data to make
better plans and policies. SDSS aids users to visualize diverse
themes of land, ecology, energy, socio, hydro and estuarine
variables of rich biodiversity hotspots and also provides an
opportunity to integrate ecological and socio-economic aspects
in decision-making. The 73rd amendment to the constitution
(1992) empowers local governing bodies to make relevant plans
for the socio-economic development of a region. Inclusive growth
enhances social capital for the public can be achieved by
ensuring the active and effective partici- pation of all
sections of society at every level of governance. The
implementation of SDSS at local levels would help in realizing
the vision of Biodiversity act, 2002, which empowers
Biodiversity Management Committees (BMC) at panchayat with the
knowledge of local biodiversity richness with ecological status
to take decisions towards the prudent use of natural resources.
Fig. 5 Ecological
sensitive regions of Uttara Kannada at panchayat level
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