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About UNEP
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United Nations Environment Programme
Division of Technology, Industry and Economics
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Newsletter and Technical Publications
<International Source Book On Environmentally Sound Technologies
for Wastewater and Stormwater Management>


Figure 1.1: Lake Victoria - impact of urbanisation and pollution

The discharge of organic and other oxidizable materials in stormwater runoff imposes much oxygen demand on the receiving waters and results in oxygen depletion which could lead to anaerobic conditions (Coleman, 1993).



Figure 1.2: Quality of stormwater runoff from roads.


Figure 1.3: Quality of stormwater runoff from roofs.

 

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