Sanitary

Sanitary Runoff can only be defined in Phases.  

Industrial Flow  - Check to include industrial flow.

Industrial Flow - The amount of industrial flow per unit area.

Industrial Peak Flow Factor - A factor to apply to the industrial flow to account for the peak flow.

Domestic Flow - Check to include domestic flow.

Domestic Flow - The amount of domestic flow per unit area.

Domestic Peak Flow Factor - A factor to apply to the domestic flow to account for the peak flow.

Calculation Method  - The method used to calculate flow. Available options are Discharge Unit and Main Drainage.

Discharge Unit

Main Drainage

Resulting Flow Rate - The total flow calculated.

Analysis

The resulting flow from the sanitary runoff is made up of three parts: Industrial flow runoff from the catchment area, Domestic flow runoff from the catchment area, and Sanitary flow from dwellings.

Resulting Flow =  Industrial flow rate + Domestic flow rate + flow rate from either Discharge Unit or Main Drainage.

The flow from the industrial portion of the development is calculated by:

Industrial flow rate = Catchment Area x Industrial Peak Flow Factor x Industrial Flow

The flow from the domestic portion of the development is calculated by:

Domestic flow rate = Catchment Area x Domestic Peak Flow Factor x Domestic Flow

Sanitary flow from dwellings can be calculated using either the Discharge Unit method or the Main Drainage method.

Discharge Unit sanitary flow calculation:

Sanitary flow rate =  SQRT( Total Discharge Units) * Frequency Factor

Main Drainage sanitary flow calculation:

Sanitary flow rate = (Flow Per Dwelling * Number of Dwellings) / 86400