5. Conclusions
In small shallow lakes whose inflow composes by domestic
sewage and farm drainage, temperature impacts the whole water
ecological system. The ecosystem of the small shallow lakes responded
to the change of temperature by sediment float/ subsidence
or algae/plants grow. TN and TP concentrations might go
to a fixed value (or range) in small natural shallow lakes in three
temperature levels. TIN was the main form of TN, and NO_
3 was
the main form of TIN in lake in each temperature levels, their quantity
was increased with the inputs increasing. DO concentrations
increased when the pH increased. The concentrations of TN, NO_
3 ,
and NH4
changed nearly in 7 _C, and NH4
and TP nearly in 14 _C,
but they had not same curve shape. Interaction between water
quality parameters was impacted by sediment or water plant.
The growth of algae or plants might lighten eutrophication to balance
the nutrient of water ecological.
Acknowledgments
We would like to thank the National Water Pollution Control
and Manage Major Projects for Science and Technology Development
of China (2008ZX07101-006) and National Natural Science
Foundation of China (40901111) for financial supports.
5. Conclusions
In small shallow lakes whose inflow composes by domestic
sewage and farm drainage, temperature impacts the whole water
ecological system. The ecosystem of the small shallow lakes responded
to the change of temperature by sediment float/ subsidence
or algae/plants grow. TN and TP concentrations might go
to a fixed value (or range) in small natural shallow lakes in three
temperature levels. TIN was the main form of TN, and NO_
3 was
the main form of TIN in lake in each temperature levels, their quantity
was increased with the inputs increasing. DO concentrations
increased when the pH increased. The concentrations of TN, NO_
3 ,
and NH4
changed nearly in 7 _C, and NH4
and TP nearly in 14 _C,
but they had not same curve shape. Interaction between water
quality parameters was impacted by sediment or water plant.
The growth of algae or plants might lighten eutrophication to balance
the nutrient of water ecological.
Acknowledgments
We would like to thank the National Water Pollution Control
and Manage Major Projects for Science and Technology Development
of China (2008ZX07101-006) and National Natural Science
Foundation of China (40901111) for financial supports.
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