Let the river be it should be
The University of Warwick
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Garin Lei
12/02/2010
Living river
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Why clean water can’t keep clean
v 9.68 ton nitrogen (Ammonia) fell to the ground per square
km per year (Shanghai)
v Take a Glass of 10 litre pure water exposed outdoor, green
algae will appear within 45 days, and the water will be stink
and dirty within 12 months
v Rainwater was discharged to the river
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Out breaking of green algae
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How to make the river from algae-type to grass-type
1
Stop the pollution
2
Change the Water
3
Chemicals
4
Let the river be it should be
?
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A Brief introduction of Water ecology
Aquatic vegetarians, Aquatic animals, Microorganisms and the
inorganic environment include water, which live interdepended
and interacted, and eventually form the chain of aquatic life
Solar
Solar
soil
soil
water
water
Air
Air
Environment
Environment
photosynthesis
photosynthesis and
and other
other environmental
environmental
functions
functions
Consumer
（Aquatic
animals）
Producer
（Aquatic
vegetarians）
Inorganic salt
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Reducer
（Microorganism）
The key elements of water ecology
Transparency
Hydrodynamic
Oxygen content
Environmental carrying capacity
Self-purification ability
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Improve the self-purification capability of the
river
v Hydrodynamic (machinery or natural power)
v Environmental carrying capacity (pave the sewage
pipes)
v Transparency (Remove the green algae)
v Oxygen content (producer- Aquatic plants)
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Eat it!
v Daphnia magna sp (62 Dm) Algae worm
§ Local species
§ Natural enemy of different kinds of algae
§ Will die without food (green algae), food of fish
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Aquatic plants
§ Floating plants absorbing nutrition fortification from roots and
leaves, Carbon source from the air and the upper water,
discharging oxygen into the air and upper water
§ Emerged plants absorbing nutrition fortification from roots
system, Carbon source from the air and discharge oxygen into the
air
§ Submerged plants absorbing nutrition fortification from roots
and leaves, Carbon source comes from water and discharges
oxygen into water
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The original status of Duanpu River
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Releasing the algae worm (1 month’s later)
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Plant the grass (2 months’ later)
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New living river
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Keep walking
•Duanpu river was restored its self-purification capability, and kept clean for 18
months without any human interferences.
•The bank of Duanpu river had been restored as it should be.
•Something will be done of 17 rivers in Baoshan District like this one this year.
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Data Change
vOxygen content
2.45
4.68
vBOD5
8.81
7.12
10.53
5.07
8.07
3.00
0.721
0.323
vCODcr
(COD chromium)
vNh3-N
(ammonia nitrogen)
vTP
(phosphor)
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