Page 1 of 13 . DATE OF PUBLISHED: 24.08.2013 Created by- Tapon Chakrabarti (B.SC. in Civil Engineering)
Dhanmondi lake water Pollution source investigation Report-2013
Jun 27, 2015
Types of pollutions,their sources of the Dhanmondi Lake.
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Page 1 of 13
.
DATE OF PUBLISHED: 24.08.2013
Created by-
Tapon
Chakrabarti
(B.SC. in Civil
Engineering)
Page 2 of 13
Investigation of the sources of pollution of Dhanmondi lake.
Pollution process of the natural reservoir:
There are many types of water pollution. It can be classify by followings-
Natural pollution
Man-made pollution
Natural Pollution
Man-made pollution
Domestic wastes are sometime contains pathogenic organisms.
Industrial wastes often contains
-Organic substances
-Minerals
-Radioactive materials.
Surface
run off
Seepag
e from
ground
water
Decaying
bodies of
animals &
plants
Acid
rain
Leachates
from
animal
excreta
Silt
discharg
e from
river
Soluble
organism
s &
microorg
anisms
Domestic Industrial Agricultur
al
Page 3 of 13
Situation:
The global situation of Dhanmondi lake is very important for both environment & living beings.
It has been equalized between the environment & people living in the same area. So it’s
important to keep a healthy environment through establishing the lake as well as its water purity
in its proper position. Here is the map of Dhanmondi lake-
Fig: Dhanmondi Lake (from bird’s eye)
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Fig: Map of Dhanmondi Lake
Page 5 of 13
Investigation : On the source of pollution of Dhanmondi lake.
Natural Pollution
Surface run off
Figure Type of pollution
By soluble organisms &
microorganisms.
By decaying bodies of animals.
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Natural Pollution
Pollution due to several types
of water plants.
Figure Type of pollution
By decaying bodies of plants
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Man-made pollution
Temporally used Solid waste land fill
Figure Type of pollution
Paper used for siting places
Drainage water mixing with lake
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Man-made pollution
House hold drainage water through
surface run off process gets mixed
with lake.
Figure Type of pollution
House hold waste water through direct
process gets mixed with lake water.
Due to unplanned structures spreading off
pollution.
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Man-made pollution
Throwing of wastes in to the lake
water.
Figure Type of pollution
Washing of cloths in to the lake water.
Due to the poultry firm the wastes get
mixed with lake water.
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Man-made pollution
Manhole linkage.
Figure Type of pollution
Roadway wastes through drainage
process gets mixed with lake water.
Washing waste water of hotel gets mixed
with canal.
Page 11 of 13
Man-made pollution
The sources of mineral water used
as washing place which causes
pollution.
Figure Type of pollution
Instruments of adjacent bazar are
washed here.
Some other instruments are washed here.
Page 12 of 13
Man-made pollution
Excessive food wastage gets mixed
with canal water.
Figure Type of pollution
Some other instruments are washed
here.
Throwing off Packets& Foods here & there.
Page 13 of 13
Man-made pollution
Moral report on the Dhanmondi lake:
Hence The lake is being polluted through all the way of pollution except industrial man made
pollution & natural acid rain, Silt discharge from river & leachate from animal excreta . So it’s
very necessary to check the current rate of pollution, otherwise it would be able to take a place in
history.
Human excreta.
Figure Type of pollution
Human excreta get mixed with lake
water from Toilet through leachate.
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