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Eutrophication & the Process of Eutrophication
WeAre… GroupNo: 05
Name Id no
Al-amin Khandakar 20-019
Pantho Sarker 20-033
Shahriar Md. Lukman 20-047
Gourav Roy 20-059
Md. Gulam Kibria 20-075
We are Presenting…
Eutrophication
Now You are with…
Gourav Roy
Id No: 20-059
Derivation of the Word “Eutrophication”
Eutrophication
“Eu”
means “well”
“trope” means
“nourishment”
What is Eutrophication
 From that sense “Eutrophication” refers to the over
nutrition of Nitrogen, Phosphorus and Carbon in the
water bodies.
 From another sense, eutrophication is the ultimate
consequence of bacterial decomposition of the green
lives and further scarcity of oxygen and suffocation as
well.
Types of Eutrophication
 There are two types of eutrophication:
• Natural Eutrophication
• Cultural Eutrophication
Eutrophication
Natural Eutrophication
Cultural Eutrophication
Natural Eutrophication
 Eutrophication that is caused
by the normal process of the
nature not interfered by
human activities is termed as
natural eutrophication.
 This sort of eutrophication
takes many years to affect the
water bodies in a full force.
 Water bodies not near the
industrial or human habitat
places are affected by such
sort of eutrophication. Figure: Natural Eutrophication
Cultural Eutrophication
 It’s a sort of eutrophication
that is caused by human
activities.
 It’s a rapid process as it takes
only decades to eutrify and
ultimately pollutes the water.
So it is much more alarming
than the natural
eutrophication.
 It’s a process that speeds up
the natural eutrophication
process.
Figure: Cultural Eutrophication
Sources of Eutrophication
Sources of Eutrophication
Sources of
Eutrophicati
on
Point
sources
Industrial
sources
Power plants
Sewage
Treatment
Plants
Non-Point
Sources
Urban sources
Agricultural
sources
Chemical
Fertilizers
Manure
Aquaculture
Fossil fuel
sources
Forestry Land
sources
Now You are with…
Md. Gulam Kibria
Id No: 20-075
Sources of Eutrophication (Continued)
 Point Sources:
Point sources are directly attributable to one influence. In point sources
the nutrient waste travels directly from source to water. Point sources
are relatively easy to regulate.
. Types Description
Industrial
Sources
Wastes from industries as emitted through pipes and proper
drainage points, it is the prominent point source.
Power Plants Power plants have specific emitting points through which
wastes are emitted
Sewage
Treatment
Plants
Treatment process releases oxides of Nitrogen and
Phosphates in effluents, which drain into water bodies
Sources of Eutrophication (Continued)
 Non-point Sources:
Nonpoint source pollution (also known as 'diffuse' or 'runoff' pollution) is
that which comes from ill-defined and diffuse sources.
Nonpoint sources are difficult to regulate and usually vary spatially and
temporally (with season, precipitation, and other irregular events).
Types Description
Urban Sources Habitants of urban areas when emit their
wastes haphazardly, it becomes a non-point
source.
Agricultural Sources Agricultural wastes like peats, cow-dung,
vegetable wastes are of this type.
Fossil Fuel Sources If emissions of fossil fuels have no specific
point source it is non-point source.
Forestry Land Sources Forestry land sources are also non-point
sources of eutrophication.
Causes of Eutrophication
Natural run-off of
nutrients from the
soil and the
weathering of rocks.
Run-off of
inorganic
fertilizer
Run-off of
manure from
farms
Run-off from
erosion
Discharge of
detergents
(containing
phosphates).
Discharge of
partially treated
or untreated
sewage
Causes of
Eutrophication
Normally the sources of
eutrophication are
indirectly responsible for
eutrophication. But the
responsible causes are
here in this picture:
Now You are with…
Pantho Sarker
Id No: 20-033
Steps of Eutrophication Process
1. Fertilizer flows into water
causing…
2. Increased plant growth on
the surface of
water, causing…..
3. Decreased light in lower
levels of water,
causing…
Steps of Eutrophication Process (Cont’d)
4. Plants in lower levels of water
to die, causing….
5. Decay using up O2 and increasing
CO2,causing…...
6. Death of fish and other animals.
Eutrophication Process in 5 Stages
NUTRIENTS LOAD
UP
PLANTS
FLOURISH
ALGAE BLOOMS,
OXYGEN
DEPLETED
DECOMPOSITION
FURTHUR
DEPLETES
OXYGEN
DEATH OF THE
ECOSYSTEM
Visual Overview of the Eutrophication Process
Now You are with…
Shahriar Md. Lukman
Id No: 20-047
Impacts of Eutrophication
Impacts of
Eutrophication
Positive
Impacts
Negative
Impacts
Negative Impacts of Eutrophication
Negative Impacts of Eutrophication (Cont’d)
 Ecological Impacts:
 Human Health Impacts:
Harmful algal blooms which produce algal toxins found in marine
ecosystem cause harm to human beings as well as animals
Increased biomass of phytoplankton resulting in algal blooms
Increased blooms of gelatinous zooplankton
Increased biomass of macroalgae
Toxic or inedible phytoplankton species
New species invasion & Decreases in water transparency
Dissolved oxygen depletion or hypoxia resulting in death of benthic animals
Negative Impacts of Eutrophication (Cont’d)
 Socio-economic Impacts:
Impact Description
Impact on recreation
and tourism
Decreases the fitness for use of the water for water sports
(swimming, boating and fishing);
Aesthetic impacts Algal blooms are unsightly and can have unpleasant
smells.
Economical impacts Infected waters increases the costs of water treatment;
Threat for fishing industries;
Negative Impacts of Eutrophication(Cont’d)
 Other Impacts:
Increased vegetation may impede water flow and the
movement of boats
Decrease in the amenity value of the water;
The water may become unsuitable for drinking even
after treatment
Increase in rate of sedimentation
Positive Impacts of Eutrophication
Improves biodiversity.
Boosts ecotourism.
Source of fish’s food.
Aids in waste removal.
The positive impacts of eutrophication are:
Now You are with…
Al-Amin Khandakar
Id No: 20-019
World’s Scenario of Eutrophication
The Potomac River, the
fourth largest river along the
Atlantic coast and the 21st
largest in the United States
Lake Erie, the fourth largest
lake of the five Great Lakes
in North America
World’s Scenario of Eutrophication (Cont’d)
Lake Iamonia, located
at northern Leon
County, Florida, USA.
Lake Biwa ,the largest
freshwater lake in Japan
World’s Scenario of Eutrophication (Cont’d)
Lake Tai or Lake Taihu, a
large freshwater lake in the
Yangtze Delta plain near
Shanghai, China
Lake Naivasha,
located in Kenya
World’s Scenario of Eutrophication (Cont’d)
Dianchi Lake or Lake Dian
and Kunming Lake, is a large
lake located at southern China
Lake Winnipeg, a large
in central North America
Bangladesh’s Scenario of Eutrophication
Gulshan Lake,
located at Dhaka City
A village pond, located
at Manikganj
Bangladesh’s Scenario of Eutrophication
An Eutrophic river at
Bandarban
An Eutrophic river at
Munshiganj
How to Control Eutrophication?
Shellfish in
estuaries
Minimizing nonpoint pollution
• Riparian buffer zones
• Nitrogen testing and modeling
• Organic farming
• Reducing the Importing Nutrients
• Endogenous Nutrients Control
• Reducing soil erosion
• Implementing Law
Eutrophication
Any Query?
Eutrophication & the Process of Eutrophication

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Eutrophication & the Process of Eutrophication

  • 2. WeAre… GroupNo: 05 Name Id no Al-amin Khandakar 20-019 Pantho Sarker 20-033 Shahriar Md. Lukman 20-047 Gourav Roy 20-059 Md. Gulam Kibria 20-075
  • 4. Now You are with… Gourav Roy Id No: 20-059
  • 5. Derivation of the Word “Eutrophication” Eutrophication “Eu” means “well” “trope” means “nourishment”
  • 6. What is Eutrophication  From that sense “Eutrophication” refers to the over nutrition of Nitrogen, Phosphorus and Carbon in the water bodies.  From another sense, eutrophication is the ultimate consequence of bacterial decomposition of the green lives and further scarcity of oxygen and suffocation as well.
  • 7. Types of Eutrophication  There are two types of eutrophication: • Natural Eutrophication • Cultural Eutrophication Eutrophication Natural Eutrophication Cultural Eutrophication
  • 8. Natural Eutrophication  Eutrophication that is caused by the normal process of the nature not interfered by human activities is termed as natural eutrophication.  This sort of eutrophication takes many years to affect the water bodies in a full force.  Water bodies not near the industrial or human habitat places are affected by such sort of eutrophication. Figure: Natural Eutrophication
  • 9. Cultural Eutrophication  It’s a sort of eutrophication that is caused by human activities.  It’s a rapid process as it takes only decades to eutrify and ultimately pollutes the water. So it is much more alarming than the natural eutrophication.  It’s a process that speeds up the natural eutrophication process. Figure: Cultural Eutrophication
  • 11. Sources of Eutrophication Sources of Eutrophicati on Point sources Industrial sources Power plants Sewage Treatment Plants Non-Point Sources Urban sources Agricultural sources Chemical Fertilizers Manure Aquaculture Fossil fuel sources Forestry Land sources
  • 12. Now You are with… Md. Gulam Kibria Id No: 20-075
  • 13. Sources of Eutrophication (Continued)  Point Sources: Point sources are directly attributable to one influence. In point sources the nutrient waste travels directly from source to water. Point sources are relatively easy to regulate. . Types Description Industrial Sources Wastes from industries as emitted through pipes and proper drainage points, it is the prominent point source. Power Plants Power plants have specific emitting points through which wastes are emitted Sewage Treatment Plants Treatment process releases oxides of Nitrogen and Phosphates in effluents, which drain into water bodies
  • 14. Sources of Eutrophication (Continued)  Non-point Sources: Nonpoint source pollution (also known as 'diffuse' or 'runoff' pollution) is that which comes from ill-defined and diffuse sources. Nonpoint sources are difficult to regulate and usually vary spatially and temporally (with season, precipitation, and other irregular events). Types Description Urban Sources Habitants of urban areas when emit their wastes haphazardly, it becomes a non-point source. Agricultural Sources Agricultural wastes like peats, cow-dung, vegetable wastes are of this type. Fossil Fuel Sources If emissions of fossil fuels have no specific point source it is non-point source. Forestry Land Sources Forestry land sources are also non-point sources of eutrophication.
  • 15. Causes of Eutrophication Natural run-off of nutrients from the soil and the weathering of rocks. Run-off of inorganic fertilizer Run-off of manure from farms Run-off from erosion Discharge of detergents (containing phosphates). Discharge of partially treated or untreated sewage Causes of Eutrophication Normally the sources of eutrophication are indirectly responsible for eutrophication. But the responsible causes are here in this picture:
  • 16. Now You are with… Pantho Sarker Id No: 20-033
  • 17. Steps of Eutrophication Process 1. Fertilizer flows into water causing… 2. Increased plant growth on the surface of water, causing….. 3. Decreased light in lower levels of water, causing…
  • 18. Steps of Eutrophication Process (Cont’d) 4. Plants in lower levels of water to die, causing…. 5. Decay using up O2 and increasing CO2,causing…... 6. Death of fish and other animals.
  • 19. Eutrophication Process in 5 Stages NUTRIENTS LOAD UP PLANTS FLOURISH ALGAE BLOOMS, OXYGEN DEPLETED DECOMPOSITION FURTHUR DEPLETES OXYGEN DEATH OF THE ECOSYSTEM
  • 20. Visual Overview of the Eutrophication Process
  • 21. Now You are with… Shahriar Md. Lukman Id No: 20-047
  • 22. Impacts of Eutrophication Impacts of Eutrophication Positive Impacts Negative Impacts
  • 23. Negative Impacts of Eutrophication
  • 24. Negative Impacts of Eutrophication (Cont’d)  Ecological Impacts:  Human Health Impacts: Harmful algal blooms which produce algal toxins found in marine ecosystem cause harm to human beings as well as animals Increased biomass of phytoplankton resulting in algal blooms Increased blooms of gelatinous zooplankton Increased biomass of macroalgae Toxic or inedible phytoplankton species New species invasion & Decreases in water transparency Dissolved oxygen depletion or hypoxia resulting in death of benthic animals
  • 25. Negative Impacts of Eutrophication (Cont’d)  Socio-economic Impacts: Impact Description Impact on recreation and tourism Decreases the fitness for use of the water for water sports (swimming, boating and fishing); Aesthetic impacts Algal blooms are unsightly and can have unpleasant smells. Economical impacts Infected waters increases the costs of water treatment; Threat for fishing industries;
  • 26. Negative Impacts of Eutrophication(Cont’d)  Other Impacts: Increased vegetation may impede water flow and the movement of boats Decrease in the amenity value of the water; The water may become unsuitable for drinking even after treatment Increase in rate of sedimentation
  • 27. Positive Impacts of Eutrophication Improves biodiversity. Boosts ecotourism. Source of fish’s food. Aids in waste removal. The positive impacts of eutrophication are:
  • 28. Now You are with… Al-Amin Khandakar Id No: 20-019
  • 29. World’s Scenario of Eutrophication The Potomac River, the fourth largest river along the Atlantic coast and the 21st largest in the United States Lake Erie, the fourth largest lake of the five Great Lakes in North America
  • 30. World’s Scenario of Eutrophication (Cont’d) Lake Iamonia, located at northern Leon County, Florida, USA. Lake Biwa ,the largest freshwater lake in Japan
  • 31. World’s Scenario of Eutrophication (Cont’d) Lake Tai or Lake Taihu, a large freshwater lake in the Yangtze Delta plain near Shanghai, China Lake Naivasha, located in Kenya
  • 32. World’s Scenario of Eutrophication (Cont’d) Dianchi Lake or Lake Dian and Kunming Lake, is a large lake located at southern China Lake Winnipeg, a large in central North America
  • 33. Bangladesh’s Scenario of Eutrophication Gulshan Lake, located at Dhaka City A village pond, located at Manikganj
  • 34. Bangladesh’s Scenario of Eutrophication An Eutrophic river at Bandarban An Eutrophic river at Munshiganj
  • 35. How to Control Eutrophication? Shellfish in estuaries Minimizing nonpoint pollution • Riparian buffer zones • Nitrogen testing and modeling • Organic farming • Reducing the Importing Nutrients • Endogenous Nutrients Control • Reducing soil erosion • Implementing Law Eutrophication

Editor's Notes

  1. It has been shown that nitrogen transport is correlated with various indices of human activity in watersheds, including the amount of development. Ploughing in agriculture and development are activities that contribute most to nutrient loading