1.
This book sheds out information about Jakkur
Lake and its biodiversity, industries, sewage, etc.
using STP (Space Type Pattern)

2.
Authority
The BDA (Bangalore Development Authority) was
in charge of the restoration from 2008 to 2010. In
October 2014, BDA handed over the lake to the
BBMP.

3.
Birds
Thousands of herons, cormorants and pelicans are
the common birds one can find in the lake. The
migratory and regional birds co-exist here. Some
of the birds travel upto 8000 kms at one stretch to
arrive at Jakkur lake

4.
Contamination
The types of contamination that usually occur
in the stagnant waters of a lake are: bacterial,
asphyxiating, fertilising and toxic.

5.
Drains
There are three storm water drains which feed
Jakkur lake from the surrounding areas like Yela-
hanka, Agrahara and Shivanahalli.

6.
Encroachment
The lake has been encroached not within the fenc-
ing but just metres outside with humans, vehicles,
apartments and a massive layout.

7.
Fish
Limited fishing activity happens in the lake with
the fishermen signing a contract with fisheries
department and breeding only Rohu, Catla and
Jalebi fish varieties.

8.
Groundwater
Since Jakkur lake is a manmade lake, the flow of
groundwater will vary. It depends on the hydrau-
lic potential in the ground and it will flow from
higher to lower potential.

9.
Hyacinth
Water hyacinth is an aquatic weed. Hyacinths de-
plete the amount of dissolved oxygen in the water
due to which a lot of fish die.

10.
Islands
The man made islands serve as a shelter for the
thousands of birds residing in Jakkur. These are
also known as the twin islands

11.
Jakkur
The lake at Jakkur is manmade and 200 yrs old.
Jakkur exists towards the North- Eastern out-
skirts of Blore.

12.
Kalyani
The Kalyani was set up to immerse Ganesha idols
on the day of Ganesh Chaturthi. It is separated
from the lake by a net so that the flowers and
debris can be collected.

13.
Landfills
The lake and its surroundings have often been
treated as a dumping zone. Debris, construction
materials and garbage have been dumped in the
vicinity of the lake.

14.
Man MadeWetlands
The plant is currently able to let out 8 million
litres of treated water into the man-made wetland
that further purifies the water by a natural process
before letting it enter the lake.

15.
Nitrate
Nitrate is a substance that develops naturally from
organic waste. Nitrate itself can function as an
indicator of sewage contamination.

16.
Open well
There are bore wells and beautiful old open wells
that adorn Jakkur lake. The constant water inflow
makes the water level in the well proportionate to
that of the lake.

17.
Periphery
There are at least 50-70 apartments around the
lake. Dry, dusty roads lead to the lake from the
surrounding areas. There is a walking path and
bunds on the inner boundary of the lake.

18.
Quality
As natural wetland systems in urban environ-
ments are sensitive and exposed, water cleaned by
this method can never be guaranteed to be pota-
ble. The quality of the water depends upon the
natural causes as well.

19.
Restoration
With the restoration work done by BDA, the
lake was dewatered, desilted and fenced. Bunds,
creation of three artificial islands, walk path, food
court and a few other facilities were also taken
care of.

20.
STP
A 10 MLD STP (Sewage Treatment Plant) has
been set up by BWSSB at the lake site since 2004.
The in-house lab of the STP checks the inlet and
outlet water quality at STP level daily. The STP
was installed to let only treated water into the
lake.

21.
TDS
TDS (Total Dissolved Salts) is a measure of the
combined content of all organic and inorganic
substances contained in a liquid.The level of TDS
is measured as a parameter to value the correct-
ness of the nitrate levels obtained.

22.
Urbanisation
The number of vehicles plying in and out and
emitting carbon monoxide for the lake to absorb
is high. New complexes and residential colonies
have also been constructed.

23.
Viral Infections
Viral infections that spread by water are SARS,
hepatitis A, polio and polyomavirus infections.
Diseases caused by water spread bacteria are
typhoid, dysentry and other infections caused by
salmonella bacteria.

24.
Weed
Jakkur lake was once choked with weeds and
sewage. Deweeding and conservation activities
have been in progress. The overgrowing partheni-
um weeds were cleared manually.

25.
Xylem
As the hyacinth is a floating plant, the xylem has
a major role to transport water upwards. The
transpiration rates are higher . Hence, less oxygen
is available for the aquatic life lying beneath.

26.
Yelahanka
Jakkur lake is the main lake in the chain of lakes
comprising of the Yelahanka Lake Upstream and
Rachenahalli Lake Downstream. The STP receives
wastewater from about 12,500 households from
surrounding areas like Yelahanka and Agrahara.

27.
Zephyr
The lake at anytime of the day has a calming
breeze that gushes by. The swaying trees, smell
of the fresh lake water and the wind make it an
enriching experience.

28.
Srishti Institute of Art, Design and Technology