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City Drainage System
Rapid development of city and sub urban, requires better drainage system, this is to prevent flooding during rainy season, and decrease or even eliminate disease cause by bacteria from garbage and dump.
Based on its location of position, we could define city drainage system into two, which are surface drainage and sub surface drainage. As we known, surface drainage is some kind of drainage that appears on the surface, while sub surface, is under the surface. Commonly in big cities, they’re using sub surface drainage considering on location, and safety for pedestrian.
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