Eutrophication & the Process of Eutrophication
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Transcript of Eutrophication & the Process of Eutrophication
We Are… Group No: 05
Name Id noAl-amin Khandakar 20-019
Pantho Sarker 20-033Shahriar Md. Lukman 20-047
Gourav Roy 20-059Md. Gulam Kibria 20-075
We are Presenting…
Eutrophication
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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
EutrophicationNatural 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 Eutrophicat
ion
Point sources
Industrial sources
Power plants
Sewage Treatment
Plants
Non-Point Sources
Urban sources
Agricultural sources
Chemical Fertilizers
Manure
AquacultureFossil fuel sources
Forestry Land sources
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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 DescriptionIndustrial 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 DescriptionUrban 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 EutrophicationNatural 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 ofEutrophication
Normally the sources of eutrophication are indirectly responsible for eutrophication. But the responsible causes are here in this picture:
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Pantho SarkerId 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
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Shahriar Md. Lukman
Id No: 20-047
Impacts of Eutrophication
Impacts of Eutrophicatio
n
Positive Impacts
Negative Impacts
Negative Impacts of Eutrophication
Negative Impacts of
Eutrophication
Ecological Impacts
Human health Impacts
Socio-economic Impacts
Impact on Recreation and
Tourism
Aesthetic Impacts
Economical Impacts
Other Impacts
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:
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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?
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