Urban Stormwater Management

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Four factors affecting sewer pipe roughness

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Very little information know, but some testing shows it is on the same order as new pipes

Difficult to determine the effect due to difficulty in relating time and nature of deposit history, but almost all stormawater sewers likely to contain some depsoits even is only held in temporary storage during passage throught the sewerage system. Important effect on calculated flow capacity; value should be based on inspection if possible.


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