Chapter:

Quantity-of-Waste-Water

Define Sewage. Write down its components.

Sewage is defined as the type of waste water produced by the community of people mainly characterized by its physical condition, chemical and toxic constituents, and its bacteriologic status.

The sewage consists of the following two components:

  • Sanitary Sewage or dry weather flow (DWF)
  • Storm Sewage or wet weather flow (WWF)

The dry weather flow is the flow through the sewers that would normally be available during non-rainfall periods. The wet weather flow is the additional flow in the sewers that would occur in rainy season during rainfall.

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